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Manual
WAGO-I/O-SYSTEM 750
Fieldbus Coupler MODBUS RTU
750-316/300-000
RS-485; 150 Baud ... 115.2 kBaud; digital and analog signals
Version 1.0.0
2 WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
© 2014 by WAGO Kontakttechnik GmbH & Co. KG
All rights reserved.
WAGO Kontakttechnik GmbH & Co. KG
Hansastraße 27
D-32423 Minden
Phone: +49 (0) 571/8 87 – 0
Fax: +49 (0) 571/8 87 – 1 69
E-Mail: [email protected]
Web: http://www.wago.com
Technical Support
Phone: +49 (0) 571/8 87 – 5 55
Fax: +49 (0) 571/8 87 – 85 55
E-Mail: [email protected]
Every conceivable measure has been taken to ensure the accuracy and completeness of this documentation. However, as errors can never be fully excluded, we always appreciate any information or suggestions for improving the documentation.
E-Mail: [email protected]
We wish to point out that the software and hardware terms as well as the trademarks of companies used and/or mentioned in the present manual are generally protected by trademark or patent.
Manual
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table of Contents 3
Table of Contents
1 Notes about this Documentation ................................................................. 6
Validity of this Documentation ................................................................. 6
Subject to Changes ............................................................................. 10
Personnel Qualifications ..................................................................... 10
Use of the WAGO-I/O-SYSTEM 750 in Compliance with Underlying
Technical Condition of Specified Devices ......................................... 11
Safety Advice (Precautions) .................................................................... 12
Manufacturing Number ........................................................................... 15
Storage, Assembly and Transport ........................................................... 16
Assembly Guidelines/Standards .............................................................. 17
Connection ..................................................................................... 19
Dimensioning ................................................................................. 20
Connection ..................................................................................... 23
Supplementary Power Supply Regulations ........................................ 28
Supply Example.................................................................................. 29
Power Supply Unit ............................................................................. 31
Grounding the DIN Rail ..................................................................... 32
Framework Assembly .................................................................... 32
Insulated Assembly ........................................................................ 32
Grounding Function............................................................................ 33
WAGO Shield Connecting System .................................................... 35
Fieldbus Connection ........................................................................... 40
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4 Table of Contents WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
4.5
4.5.1
4.5.2
4.5.3
Mode Selector Switch......................................................................... 43
Manual Configuration .................................................................... 49
Technical Data ........................................................................................ 52
Device Data ........................................................................................ 52
System Data ........................................................................................ 52
Connection Type ................................................................................ 52
Climatic Environmental Conditions ................................................... 53
Mechanical Strength acc. to IEC 61131-2 .......................................... 53
Standards and Guidelines ........................................................................ 56
Mounting onto Carrier Rail ..................................................................... 59
Carrier Rail Properties ........................................................................ 59
WAGO DIN Rail ................................................................................ 60
Inserting and Removing Devices ............................................................ 62
Inserting the Fieldbus Coupler/Controller .......................................... 63
Removing the Fieldbus Coupler/Controller ....................................... 63
Inserting the I/O Module .................................................................... 64
Removing the I/O Module .................................................................. 65
Data Contacts/Internal Bus ..................................................................... 66
Power Contacts/Field Supply .................................................................. 67
Connecting a Conductor to the CAGE CLAMP
................................... 68
Startup of the Fieldbus Coupler .............................................................. 69
Process Data Architecture ....................................................................... 71
Example of an Input Process Image ................................................... 72
Example of an Output Process Image ................................................ 73
Process Data MODBUS RTU ............................................................ 74
Memory Space .................................................................................... 75
Adressing the I/O Modules ............................................................ 76
Data Exchange between MODBUS RTU Master and I/O Modules .. 77
Evaluating Fieldbus Status ................................................................. 81
Evaluating Node Status – I/O LED (Blink Code Table) .................... 82
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Table of Contents 5
Evaluating Power Supply Status ........................................................ 88
Behavior of the Fieldbus Coupler during Interruption of Operations ..... 89
Internal Data Bus Error ...................................................................... 89
MODBUS-Functions ............................................................................... 90
Description of the MODBUS Functions ............................................ 93
Function Code FC23 (Read/Write Multiple Registers) ............... 102
MODBUS Register Mapping ........................................................... 103
Bit Access .................................................................................... 104
MODBUS Registers ......................................................................... 105
Accessing Register Values .......................................................... 105
Watchdog Registers ..................................................................... 106
Diagnostic Registers .................................................................... 110
Configuration Registers ............................................................... 110
Firmware Information Registers .................................................. 112
Constant Registers ....................................................................... 113
Specialty Modules ............................................................................ 126
System Modules ............................................................................... 151
Binary Space Module .................................................................. 151
12 Use in Hazardous Environments ............................................................ 152
Marking Configuration Examples ......................................................... 153
Marking for Europe According to ATEX and IEC-Ex .................... 153
Marking for America According to NEC 500 .................................. 156
Special Conditions for Safe Operation of the ATEX and IEC Ex (acc.
DEMKO 08 ATEX 142851X and IECEx PTB 07.0064) ................. 158
Special conditions for safe use (ATEX Certificate TÜV 07 ATEX
Special conditions for safe use (IEC-Ex Certificate TUN 09.0001 X)161
ANSI/ISA 12.12.01 .......................................................................... 163
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1
Notes about this Documentation WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Notes about this Documentation
Always retain this documentation!
This documentation is part of the product. Therefore, retain the documentation during the entire service life of the product. Pass on the documentation to any subsequent user. In addition, ensure that any supplement to this documentation is included, if necessary.
1.1 Validity of this Documentation
This documentation is only applicable to the “Fieldbus Coupler MODBUS RTU”
(750-316/300-000).
The product “Fieldbus Coupler MODBUS RTU” (750-316/300-000) shall only be installed and operated according to the instructions in this manual and the system description for the WAGO-I/O-SYSTEM 750.
Consider power layout of the WAGO-I/O-SYSTEM 750!
In addition to these operating instructions, you will also need the system description for the WAGO-I/O-SYSTEM 750, which can be downloaded at www.wago.com
. There, you can obtain important information including information on electrical isolation, system power and supply specifications.
1.2 Copyright
This Manual, including all figures and illustrations, is copyright-protected. Any further use of this Manual by third parties that violate pertinent copyright provisions is prohibited. Reproduction, translation, electronic and phototechnical filing/archiving (e.g., photocopying) as well as any amendments require the written consent of WAGO Kontakttechnik GmbH & Co. KG, Minden, Germany.
Non-observance will involve the right to assert damage claims.
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1.3 Symbols
Notes about this Documentation 7
Personal Injury!
Indicates a high-risk, imminently hazardous situation which, if not avoided, will result in death or serious injury.
Personal Injury Caused by Electric Current!
Indicates a high-risk, imminently hazardous situation which, if not avoided, will result in death or serious injury.
Personal Injury!
Indicates a moderate-risk, potentially hazardous situation which, if not avoided, could result in death or serious injury.
Personal Injury!
Indicates a low-risk, potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
Damage to Property!
Indicates a potentially hazardous situation which, if not avoided, may result in damage to property.
Damage to Property Caused by Electrostatic Discharge (ESD)!
Indicates a potentially hazardous situation which, if not avoided, may result in damage to property.
Important Note!
Indicates a potential malfunction which, if not avoided, however, will not result in damage to property.
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8 Notes about this Documentation WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Additional Information:
Refers to additional information which is not an integral part of this documentation (e.g., the Internet).
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1.4 Number Notation
Table 1: Number Notation
Number code Example
Decimal 100
Hexadecimal
Binary
0x64
'100'
'0110.0100'
Notes about this Documentation 9
Note
Normal notation
C notation
In quotation marks, nibble separated with dots (.)
1.5 Font Conventions
Table 2: Font Conventions
Font type Indicates italic Names of paths and data files are marked in italic-type. e.g.: C:\Programme\WAGO-I/O-CHECK
Menu Menu items are marked in bold letters. e.g.: Save
>
Input
A greater-than sign between two names means the selection of a menu item from a menu. e.g.: File > New
Designation of input or optional fields are marked in bold letters, e.g.: Start of measurement range
“Value” Input or selective values are marked in inverted commas. e.g.: Enter the value “4 mA” under Start of measurement range .
[Button] Pushbuttons in dialog boxes are marked with bold letters in square brackets. e.g.: [Input]
[Key] Keys are marked with bold letters in square brackets. e.g.: [F5]
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10 Important Notes
2 Important Notes
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
This section includes an overall summary of the most important safety requirements and notes that are mentioned in each individual section. To protect your health and prevent damage to devices as well, it is imperative to read and carefully follow the safety guidelines.
2.1 Legal Bases
2.1.1 Subject to Changes
WAGO Kontakttechnik GmbH & Co. KG reserves the right to provide for any alterations or modifications that serve to increase the efficiency of technical progress. WAGO Kontakttechnik GmbH & Co. KG owns all rights arising from the granting of patents or from the legal protection of utility patents. Third-party products are always mentioned without any reference to patent rights. Thus, the existence of such rights cannot be excluded.
2.1.2 Personnel Qualifications
All sequences implemented on WAGO-I/O-SYSTEM 750 devices may only be carried out by electrical specialists with sufficient knowledge in automation. The specialists must be familiar with the current norms and guidelines for the devices and automated environments.
All changes to the coupler or controller should always be carried out by qualified personnel with sufficient skills in PLC programming.
2.1.3 Use of the WAGO-I/O-SYSTEM 750 in Compliance with
Underlying Provisions
Fieldbus couplers, fieldbus controllers and I/O modules found in the modular
WAGO-I/O-SYSTEM 750 receive digital and analog signals from sensors and transmit them to actuators or higher-level control systems. Using programmable controllers, the signals can also be (pre-) processed.
The devices have been developed for use in an environment that meets the IP20 protection class criteria. Protection against finger injury and solid impurities up to
12.5 mm diameter is assured; protection against water damage is not ensured.
Unless otherwise specified, operation of the devices in wet and dusty environments is prohibited.
Operating the WAGO-I/O-SYSTEM 750 devices in home applications without further measures is only permitted if they meet the emission limits (emissions of interference) according to EN 61000-6-3. You will find the relevant information in the section “Device Description” > “Standards and Guidelines” in the manual for the used fieldbus coupler/controller.
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Important Notes 11
Appropriate housing (per 94/9/EG) is required when operating the WAGO-I/O-
SYSTEM 750 in hazardous environments. Please note that a prototype test certificate must be obtained that confirms the correct installation of the system in a housing or switch cabinet.
2.1.4 Technical Condition of Specified Devices
The devices to be supplied ex works are equipped with hardware and software configurations, which meet the individual application requirements. WAGO
Kontakttechnik GmbH & Co. KG will be exempted from any liability in case of changes in hardware or software as well as to non-compliant usage of devices.
Please send your request for modified and new hardware or software configurations directly to WAGO Kontakttechnik GmbH & Co. KG.
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12 Important Notes WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
2.2 Safety Advice (Precautions)
For installing and operating purposes of the relevant device to your system the following safety precautions shall be observed:
Do not work on devices while energized!
All power sources to the device shall be switched off prior to performing any installation, repair or maintenance work.
Install the device only in appropriate housings, cabinets or in electrical operation rooms!
The WAGO-I/O-SYSTEM 750 and its components are an open system. As such, install the system and its components exclusively in appropriate housings, cabinets or in electrical operation rooms. Allow access to such equipment and fixtures to authorized, qualified staff only by means of specific keys or tools.
Replace defective or damaged devices!
Replace defective or damaged device/module (e.g., in the event of deformed contacts), since the long-term functionality of device/module involved can no longer be ensured.
Protect the components against materials having seeping and insulating properties!
The components are not resistant to materials having seeping and insulating properties such as: aerosols, silicones and triglycerides (found in some hand creams). If you cannot exclude that such materials will appear in the component environment, then install the components in an enclosure being resistant to the above-mentioned materials. Clean tools and materials are imperative for handling devices/modules.
Clean only with permitted materials!
Clean soiled contacts using oil-free compressed air or with ethyl alcohol and leather cloths.
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Important Notes 13
Do not use any contact spray!
Do not use any contact spray. The spray may impair contact area functionality in connection with contamination.
Do not reverse the polarity of connection lines!
Avoid reverse polarity of data and power supply lines, as this may damage the devices involved.
Avoid electrostatic discharge!
The devices are equipped with electronic components that may be destroyed by electrostatic discharge when touched. Please observe the safety precautions against electrostatic discharge per DIN EN 61340-5-1/-3. When handling the devices, please ensure that environmental factors (personnel, work space and packaging) are properly grounded.
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14 System Description
3 System Description
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
The WAGO-I/O-SYSTEM 750 is a modular, fieldbus-independent input/output system (I/O system). The configuration described here consists of a fieldbus coupler/controller (1) and the modular I/O modules (2) for any signal shapes that form the fieldbus node together. The end module (3) completes the node and is required for correct operation of the fieldbus node.
Figure 1: Fieldbus Node (Example)
Fieldbus couplers/controllers are available for different fieldbus systems.
The standard fieldbus couplers/controllers and extended ECO fieldbus couplers contain the fieldbus interface, electronics and a power supply terminal. The fieldbus interface forms the physical interface to the relevant fieldbus. The electronics process the data of the I/O modules and make it available for the fieldbus communication. The 24 V system supply and the 24 V field supply are fed in via the integrated power supply terminal.
The fieldbus coupler/controller exchanges process data with the respective control via the respective fieldbus. The programmable fieldbus controllers (PFC) allow implementation of additional PLC functions. WAGO-I/O-PRO is used to program the fieldbus controllers according to IEC 61131-3.
I/O modules for diverse digital and analog I/O signals as well as special functions can be connected to the fieldbus coupler/controller. The communication between the fieldbus coupler/controller and the I/O modules is carried out via an internal bus.
The components of the WAGO-I/O-SYSTEM 750 have clear termination points, light emitting diodes for status display, plug-in mini WSB tags and group marker cards for labeling.
The 1, 2 or 3 wire technology supplemented by a ground wire connection allows for direct sensor or actuator wiring.
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System Description 15
3.1 Manufacturing Number
The serial number indicates the delivery status directly after production. This number is part of the labeling on the side of each component.
In addition, the serial number is printed on the cover cap of the configuration and programming interface of the fieldbus coupler/controller, so that it can also be read when installed.
Figure 2: Labeling on the Side of a Component (Example)
Manufacturing number
01 03 01 02 03 - B060606
Calendar week
Year Software version
Hardware version
Firmware Internal loader version number
Figure 3: Example of a Manufacturing Number
The manufacturing number consists of the production week and year, the software version (if available), the hardware version of the component, the firmware loader
(if available) and further internal information for WAGO Kontakttechnik GmbH
& Co. KG.
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3.2 Component Update
For the case of an update of one component, the lateral marking on each component contains a prepared matrix.
This matrix makes columns available for altogether three updates to the entry of the current update data, like production order number (NO; starting from calendar week 13/2004), date stamp (DS), software version (SW), hardware version (HW) and the firmware loader version (FWL, if available).
Current version data for
Production order no. NO
1. Update 2. Update 3. Update
only starting from
Date stamp
Software version
DS
SW
calendar week 13/2004
Hardware version
Firmware loader vers.
HW
FWL
only for fieldbus
couplers/controllers
If the update of a component took place, the current version data are registered into the columns of the matrix.
Additionally with the update of a fieldbus coupler or controller also the cover of the configuration and programming interface of the fieldbus coupler or controller is imprinted with the current production order number.
The original manufacturing information on the device's housing remains unchanged.
3.3 Storage, Assembly and Transport
Whenever possible, the components are to be stored in their original packaging.
Likewise, the original packaging provides optimal protection during transport.
When assembling or repacking the components, the contacts must not be soiled or damaged. The components must be stored and transported in appropriate containers/packaging. Thereby, the ESD information is to be regarded.
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System Description 17
3.4 Assembly Guidelines/Standards
DIN 60204 Electrical equipping of machines
DIN EN 50178 Equipping of high-voltage systems with electronic components
(replacement for VDE 0160)
EN 60439 Low voltage switchgear assemblies
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18 System Description
3.5 Power Supply
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
3.5.1 Isolation
Within the fieldbus node, there are three electrically isolated potentials:
• Electrically isolated fieldbus interface via transformer
• Electronics of the fieldbus couplers/controllers and the I/O modules
(internal bus)
• All I/O modules have an electrical isolation between the electronics
(internal bus, logic) and the field electronics. Some digital and analog input modules have each channel electrically isolated, please see catalog.
Figure 4: Isolation for Fieldbus Couplers/Controllers (Example)
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3.5.2 System Supply
System Description 19
3.5.2.1 Connection
The WAGO-I/O-SYSTEM 750 requires a 24 V direct current system supply.
The power supply is provided via the fieldbus coupler/controller and, if necessary, in addition via internal system supply modules 750-613. The power supply is reverse voltage protected.
Do not use an incorrect voltage/frequency!
The use of an incorrect supply voltage or frequency can cause severe damage to the components.
Figure 5: System Supply via Fieldbus Coupler/Controller (left) and via Internal System Supply
Module (right)
Table 3: Legend for Figure “System Supply via Fieldbus Coupler/Controller (left) and via Internal
System Supply Module (right)”
Position Description
1
2
System supply DC 24 V (-25 % … +30 %)
System supply 0 V
The fed DC 24 V supplies all internal system components, e.g. fieldbus coupler/controller electronics, fieldbus interface and I/O modules via the internal bus (5 V system voltage). The 5 V system voltage is galvanically connected to the
24 V system supply.
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Figure 6: System Voltage for Standard Couplers/Controllers and Extended ECO Couplers
Only reset the system simultaneously for all supply modules!
Reset the system by simultaneously switching the system supply at all supply modules (fieldbus coupler/controller and potential supply module with bus power supply) off and on again.
3.5.2.2 Dimensioning
Recommendation
A stable power supply cannot always be assumed. Therefore, you should use regulated power supplies to ensure the quality of the supply voltage.
The supply capacity of the fieldbus coupler/controller or the internal system supply module can be taken from the technical data of the components.
Table 4: Alignment
Internal current consumption
*)
Current consumption via system voltage (5 V for electronics of I/O modules and fieldbus coupler/controller).
Total current for I/O modules
*)
Available current for the I/O modules. Provided by the bus power supply unit. See fieldbus coupler/controller and internal system supply module
*)
See current catalog, manuals, Internet
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Example:
System Description 21
Calculating the current consumption on the fieldbus coupler:
Internal current consumption of the coupler
Total current for I/O modules
Sum I
(5 V) total
350 mA at 5 V
1650 mA at 5 V
2000 mA at 5 V
The internal current consumption is indicated in the technical data for each bus terminal. In order to determine the total requirement, add together the values of all
I/O modules in the node.
Please note the aggregate current for I/O modules. It may be necessary to supply potential!
When the sum of the internal current consumption for the I/O modules exceeds their aggregate current, you must use a supply module with bus power supply.
Install it before the position where the permissible aggregate current would be exceeded.
Example:
Calculating the total current on a standard fieldbus coupler/controller:
A node configuration with 20 relay modules (750-517) and 30 digital input modules (750-405) should be attached to a fieldbus coupler/controller:
Internal current consumptions 20 × 90 mA = 1800 mA at 5 V
+ 30 × 2 mA = 60 mA at 5 V
Sum of internal current consumptions 1860 mA at 5 V
However, the fieldbus coupler can only provide 1650 mA for the I/O modules.
Consequently, an internal system supply module (750-613), e. g. in the middle of the node, should be added.
Recommendation
Utilize the smartDESIGNER feature WAGO ProServe
® software to configure fieldbus node assembly. You can test the configuration via the integrated plausibility check.
The maximum input current of the 24 V system supply is 500 mA. The exact electrical consumption (I
(V)
) can be determined with the following formulas:
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Fieldbus coupler or controller
I
(5 V) total
= Sum of all the internal current consumption of the connected
I/O modules + internal current consumption of the fieldbus coupler/controller
Internal system supply module
I
(5 V) total
= Sum of all the internal current consumption of the connected
I/O modules at internal system supply module
Input current I
(24 V)
=
5 V
24 V
×
I
(5 V) total
η
η = 0.87
(87 % Efficiency of the power supply at nominal load 24 V)
Activate all outputs when testing the current consumption!
If the electrical consumption of a power supply point for the 24 V system supply exceeds 500 mA, then the cause may be an improperly dimensioned node or a defect.
During the test, you must activate all outputs.
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3.5.3 Field Supply
System Description 23
3.5.3.1 Connection
Sensors and actuators can be directly connected to the relevant channel of the I/O module in 1, 2, 3 or 4 conductor connection technology. The I/O module supplies power to the sensors and actuators. The input and output drivers of some I/O modules require the field side supply voltage.
The fieldbus coupler/controller provides field side power (DC 24 V). In this case it is a passive power supply without protection equipment.
Power supply modules with or without fuse holder and diagnostic capability are available for the power supply of other field potentials (DC 24 V, AC/DC 0 …
230 V, AC 120 V, AC 230 V). The power supply modules can also be used to set up various potential groups. The connections are connected in pairs to a power contact.
Figure 7: Field Supply for Standard Couplers/Controllers and Extended ECO Couplers
Table 5: Legend for Figure “Field Supply for Standard Couplers/Controllers and Extended ECO
Couplers”
Field supply
1 24 V (-15 % / +20 %)
2 0 V
3 Optional ground potential
Power jumper contacts
4 Potential distribution to adjacent I/O modules
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750-316/300-000 Fieldbus Coupler MODBUS RTU
The field-side power supply is automatically derived from the power jumper contacts when snapping an I/O module.
The current load of the power contacts must not exceed 10 A on a continual basis.
By inserting an additional power supply module, the field supply via the power contacts is disrupted. From there a new power supply occurs which may also contain a new voltage potential.
Re-establish the ground connection when the connection to the power jumper contacts is disrupted!
Some I/O modules have no or very few power contacts (depending on the I/O function). Due to this, the passing through of the relevant potential is disrupted. If you require a field supply via power jumper contacts for subsequent I/O modules, then you have to use a power supply module.
Note the data sheets of the I/O modules.
Use a spacer module when setting up a node with different potentials!
In the case of a node setup with different potentials, e.g. the alteration from
DC 24 V to AC 230 V, you should use a spacer module. The optical separation of the potentials acts as a warning to heed caution in the case of wiring and maintenance works. Thus, you can prevent the results of wiring errors.
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System Description 25
3.5.3.2 Fusing
Internal fusing of the field supply is possible for various field voltages via an appropriate power supply module.
Table 6: Power Supply Modules
Order No. Field Voltage
750-601
750-609
750-615
750-617
24 V DC, Supply/Fuse
230 V AC, Supply/Fuse
120 V AC, Supply/Fuse
24 V AC, Supply/Fuse
750-610
750-611
24 V DC, Supply/Fuse/Diagnosis
230 V AC, Supply/Fuse/Diagnosis
750-606 Supply Module 24 V DC, 1,0 A, Ex i
750-625/000-001 Supply Module 24 V DC, 1,0 A, Ex i (without diagnostics)
Figure 8: Supply Module with Fuse Carrier (Example 750-610)
Observe the maximum power dissipation and, if required, UL requirements!
In the case of power supply modules with fuse holders, you must only use fuses with a maximum dissipation of 1.6 W (IEC 127).
For UL approved systems only use UL approved fuses.
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750-316/300-000 Fieldbus Coupler MODBUS RTU
In order to insert or change a fuse, or to switch off the voltage in succeeding I/O modules, the fuse holder may be pulled out. In order to do this, use a screwdriver for example, to reach into one of the slits (one on both sides) and pull out the holder.
Figure 9: Removing the Fuse Carrier
Lifting the cover to the side opens the fuse carrier.
Figure 10: Opening the Fuse Carrier
Figure 11: Changing the Fuse
After changing the fuse, the fuse carrier is pushed back into its original position.
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System Description 27
Alternatively, fusing can be done externally. The fuse modules of the WAGO series 281 and 282 are suitable for this purpose.
Figure 12: Fuse Modules for Automotive Fuses, Series 282
Figure 13: Fuse Modules for Automotive Fuses, Series 2006
Figure 14: Fuse Modules with Pivotable Fuse Carrier, Series 281
Figure 15: Fuse Modules with Pivotable Fuse Carrier, Series 2002
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750-316/300-000 Fieldbus Coupler MODBUS RTU
3.5.4 Supplementary Power Supply Regulations
The WAGO-I/O-SYSTEM 750 can also be used in shipbuilding or offshore and onshore areas of work (e. g. working platforms, loading plants). This is demonstrated by complying with the standards of influential classification companies such as Germanischer Lloyd and Lloyds Register.
Filter modules for 24 V supply are required for the certified operation of the system.
Table 7: Filter Modules for 24 V Supply
Order No. Name Description
750-626 Supply Filter Filter module for system supply and field supply
(24 V, 0 V), i. e. for fieldbus coupler/controller and bus power supply (750-613)
750-624 Supply Filter Filter module for the 24 V field supply
(750-602, 750-601, 750-610)
Therefore, the following power supply concept must be absolutely complied with.
Figure 16: Power Supply Concept
Use a supply module for equipotential bonding!
Use an additional 750-601/ 602/ 610 Supply Module behind the 750-626 Filter
Module if you want to use the lower power jumper contact for equipotential bonding, e.g., between shielded connections and require an additional tap for this potential.
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
System Description 29
3.5.5 Supply Example
Suppl Sggggggggggggggggg
The system supply and the field supply shall be separated!
You should separate the system supply and the field supply in order to ensure bus operation in the event of a short-circuit on the actuator side.
Figure 17: Supply Example for Standard Couplers/Controllers
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30 System Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 8: Legend for Figure “Supply Example for Fieldbus Coupler/Controller”
Pos. Description
1 Power Supply on coupler via external Supply Module
2 Power Supply with optional ground
3 Internal System Supply Module
4 Separation module recommended
5 Supply Module passive
6 Supply Module with fuse carrier/diagnostics
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750-316/300-000 Fieldbus Coupler MODBUS RTU
System Description 31
3.5.6 Power Supply Unit
The WAGO-I/O-SYSTEM 750 requires a 24 VDC voltage (system supply).
Recommendation
A stable power supply cannot always be assumed everywhere. Therefore, you should use regulated power supplies to ensure the quality of the supply voltage
(see also table “WAGO power supply units”).
For brief voltage dips, a buffer (200 µF per 1 A load current) must be provided.
Power failure time not acc. IEC 61131-2!
Note that the power failure time of 10 ms acc. IEC 61131-2 is not maintained in a maximum configuration.
The power demand must be determined individually depending on the entry point of the field supply. All loads through field devices and I/O modules must be taken into account. The field supply also impacts the I/O modules because the input and output drivers of some I/O modules require the voltage of the field supply.
System and field supply must be isolated!
The system supply and field supply must be isolated to ensure bus operation in the event of short circuits on the actuator side.
Table 9: WAGO Power Supply Units (Selection)
Description WAGO Power
Supply Unit
787-612
787-622
Primary switched mode;
DC 24 V; 2,5 A Input nominal voltage AC 230 V
Primary switched mode;
DC 24 V; 5 A Input nominal voltage AC 230 V
787-632
288-809
288-810
288-812
288-813
Primary switched mode;
DC 24 V; 10 A Input nominal voltage AC 230/115 V
Rail-mounted modules with universal mounting carrier
AC 115 V/DC 24 V; 0,5 A
AC 230 V/DC 24 V; 0,5 A
AC 230 V/DC 24 V; 2 A
AC 115 V/DC 24 V; 2 A
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32 System Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
3.6 Grounding
3.6.1 Grounding the DIN Rail
3.6.1.1 Framework Assembly
When setting up the framework, the carrier rail must be screwed together with the electrically conducting cabinet or housing frame. The framework or the housing must be grounded. The electrical connection is established via the screw. Thus, the carrier rail is grounded.
Ensure sufficient grounding is provided!
You must take care to ensure the flawless electrical connection between the carrier rail and the frame or housing in order to guarantee sufficient grounding.
3.6.1.2 Insulated Assembly
Insulated assembly has been achieved when there is constructively no direct ohmic contact between the cabinet frame or machine parts and the carrier rail.
Here, the earth ground must be set up via an electrical conductor in accordance with valid national safety regulations.
Recommendation
The optimal setup is a metallic assembly plate with grounding connection which is electrically conductive linked to the carrier rail.
The separate grounding of the carrier rail can be easily set up with the aid of the
WAGO ground wire terminals.
Table 10: WAGO Ground Wire Terminals
Order No. Description
283-609 1-conductor ground (earth) terminal block make an automatic contact to the carrier rail; conductor cross section: 0.2 mm² … 16 mm
2
Note : Also order the end and intermediate plate (283-320).
Manual
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
3.6.2 Grounding Function
System Description 33
The grounding function increases the resistance against electro-magnetic interferences. Some components in the I/O system have a carrier rail contact that dissipates electro-magnetic interferences to the carrier rail.
Figure 18: Carrier Rail Contact (Example)
Ensure sufficient grounding is provided!
You must take care to ensure the direct electrical connection between the carrier rail contact and the carrier rail.
The carrier rail must be grounded.
For information on carrier rail properties, see section “Mounting” > … > “Carrier
Rail Properties”.
The bottom CAGE CLAMP
® connectors of the supply modules enable optional connection of a field-side functional ground. This potential is made available to the I/O module arranged on the right through the spring-loaded contact of the three power contacts. Some I/O modules are equipped with a knife-edge contact that taps this potential. This forms a potential group with regard to functional ground with the I/O module arranged on the left.
Manual
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34 System Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
3.7 Shielding
3.7.1 General
Use of shielded cables reduces electromagnetic interference and thus increases signal quality. Measurement errors, data transmission errors and interference due to excessive voltage can be prevented.
Connect the cable shield to the ground potential!
Integrated shielding is mandatory to meet the technical specifications in regards to measuring accuracy. Connect the cable shield and ground potential at the inlet to the cabinet or housing. This allows induced interference to dissipate and to be kept away from devices in the cabinet or housing.
Improve shielding performance by placing the shield over a large area!
Higher shielding performance is achieved via low-impedance connection between shield and ground. For this purpose, connect the shield over a large surface area, e.g., WAGO shield connecting system. This is especially recommended for largescale systems where equalizing current or high impulse-type currents caused by atmospheric discharge may occur.
Keep data and signal lines away from sources of interference!
Route data and signal lines separately from all high voltage cables and other sources of high electromagnetic emission (e.g., frequency converter or drives).
3.7.2 Bus Cables
The shielding of the bus line is described in the respective configuration guidelines and standards of the bus system.
Manual
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
3.7.3 Signal Lines
System Description 35
I/O modules for analog signals and some interface I/O modules are equipped with shield clamps.
Use shielded signal lines!
Only use shielded signal lines for analog signals and I/O modules which are equipped with shield clamps. Only then can you ensure that the accuracy and interference immunity specified for the respective I/O module can be achieved even in the presence of interference acting on the signal cable.
3.7.4 WAGO Shield Connecting System
The WAGO shield connecting system consists of shield clamping saddles, busbars and various mounting carriers. These components can be used to achieve many different configurations.
Figure 19: Examples of the WAGO Shield Connecting System
Figure 20: Application of the WAGO Shield Connecting System
Manual
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36 Device Description
4 Device Description
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
The Fieldbus Coupler MODBUS RTU 750-316/300-000 links the
WAGO-I/O-SYSTEM 750 to the MODBUS fieldbus system.
In the Fieldbus Coupler, all input signals from the sensors are combined. After connecting the Fieldbus Coupler, the Fieldbus Coupler determines which I/O modules are on the node and creates a local process image from these. Analog and specialty module data is sent via words and/or bytes; digital data is grouped bitby-bit.
The data of the analog modules is mapped first into the process image. The modules are mapped in the order of their physical position after the Coupler.
The bits of the digital modules are combined into words and then mapped after the analog ones in the process image. If the number of digital I/Os is greater than 16 bits, the Fieldbus Coupler automatically begins a new word.
Manual
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Device Description 37
4.1 View
The view shows three parts:
• The fieldbus connection and the rotary encoder switch are located on the left side.
• LEDs for operating status, bus communication, error messages and diagnostics, as well as the service interface are in the middle area.
• The right side shows a power supply unit for the system supply and contacts for the field supply of the series-connected I/O modules via power jumper contacts.
LEDs show the status of the operating voltage for the system and field power (jumper contacts).
Figure 21: View MODBUS RTU Fieldbus Controller
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38 Device Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 11: Key for View of MODBUS RTU Fieldbus Coupler
Pos.
Designation
Explanation
1
ON, TxD,
RxD,
CRC, I/O
Fieldbus status LEDs
2 ---
Group marking carrier (retractable) with additional marking possibility on two miniature
WSB markers
3 A, B or C Status LED’s System/Field Supply
For details see Section:
”evice Description” >
“Display Elements”
---
4
5
6
7
8
9
10
11
12
13
14
15
16
--- Data Contacts
24 V, 0 V CAGE CLAMP
+
---
---
-
---
(Ground)
---
---
---
---
---
CAGE CLAMP
24 VDC
CAGE CLAMP
®
Connections Field Supply
(Ground)
®
®
Connections System Supply
Connections Field Supply
Power Jumper Contact 24 VDC
Unlocking Lug
CAGE CLAMP
®
Connections Field Supply 0 V
Power Jumper Contact 0 V
Power Jumper Contact (Ground)
Service Interface (open flap)
Rotary encoder switch
Locking Disc
Fieldbus connection RS-232
“Device Description” >
“Display Elements”
“Connect Devices” > “Data
Contacts/Internal Bus”
“Connect Devices” >
“Connecting a conductor to the CAGE CLAMP
®
”
“Connect Devices” >
“Connecting a conductor to the CAGE CLAMP
®
”
“Connect Devices” >
“Power Contacts/
Field Supply”
“Mounting” >
“Inserting and Removing
Devices”
“Connect Devices” >
“Connecting a conductor to the CAGE CLAMP
®
”
“Connect Devices” >
“Power Contacts/
Field Supply”
“Connect Devices” >
“Connecting a conductor to the CAGE CLAMP
®
”
“Connect Devices” >
“Power Contacts/
Field Supply”
“Device Description” >
“Operating Elements”
“Device Description” >
“Operating Elements”
“Mounting” > “Inserting and Removing Devices”
“Device Description” >
“Connectors”
Manual
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
4.2 Connectors
Device Description 39
4.2.1 Device Supply
The device is powered via terminal blocks with CAGE CLAMP
® connections.
The device supply generates the necessary voltage to power the electronics of the device and the internal electronics of the connected I/O modules.
The fieldbus interface is galvanically separated to the electrical potential of the device.
Figure 22: Device Supply
Manual
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40 Device Description
4.2.2 Fieldbus Connection
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Figure 23: Pin Assignment for D-Sub Fieldbus Connection (Female)
The SUB-D connector for the RS-232 interface is wired as follows:
Table 12: Bus Connection and Connection Plug Arrangement for the RS-232
Contact
1
2
3
4
Signal
-
TxD
RxD
-
1:1 PC connection
--------
--------
--------
--------
-
TxD
RxD
- not used
Receive signal
Transmit signal not used
Description
5
6
7
8
GND
-
-
-
--------
--------
--------
--------
GND
-
-
-
Signal and supply ground not used not used not used
9 - -------- - not used
The pin arrangement corresponds to the RS-232 DCE arrangement. This allows the use of customary 9-pole 1:1 socket/plug cables for the direct connection of a
PC.
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Device Description 41
4.3 Display Elements
The operating condition of the fieldbus coupler or the node is displayed with the help of illuminated indicators in the form of light-emitting diodes (LEDs).
The LED information is routed to the top of the case by light guides. In some cases, the LEDs are multi-colored (red, green or orange).
+
+
+
Figure 24: Display Elements
For the diagnostics of the different domains fieldbus, node and supply voltage, the
LEDs can be divided into three groups:
Table 13: Display Elements Fieldbus Status
LED Color Meaning
ON green indicates a correct initialization
TxD indictes that data is being sent
RxD red/green/ orange red/green/ orange indicates that data is being received
TxD/RxD red/green/ orange indicates the existing transfer of data
Table 14: Display Elements Node Status
LED
I/O
Color red/green/ orange
Meaning
Indicates the operation of the node and signals via a blink code faults encountered.
Table 15: Display Elements Supply Voltage
LED
A
B
Color green green
Meaning indicates the status of the operating voltage – system indicates the status of the operating voltage – power jumper contacts
More information about the LED Signaling
Read the detailed description for the evaluation of the displayed LED state in the section “Diagnostics” > … > “LED Signaling”.
Manual
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42 Device Description
4.4 Operating Elements
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
4.4.1 Service Interface
The service interface is located behind the flap.
It is used for the communication with the WAGO-I/OCHECK and for downloading the firmware updates.
Figure 25: Service Interface (Closed and Opened Flap)
Table 16: Legend for Figure “Service Interface (Closed and Opened Flap)”
Number
1
2
Description
Open closed
View Service Interface
Device must be de-energized!
To prevent damage to the device, unplug and plug in the communication cable only when the device is de-energized!
The connection to the 4-pin header under the cover flap can be realized via the communication cables with the item numbers750-920 and 750-923 or via the
WAGO radio adapter with the item number 750-921.
Manual
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
4.4.2 Mode Selector Switch
The mode selector switch is located behind the cover flap.
Device Description 43
Figure 26: Mode Selector Switch (Closed and Open Damper of the Service Port)
Table 17: Mode Selector Switch
Number
1
Description
Open the damper
2 Operating mode switch
The operating mode switch serves for setting the parameters in the configuration mode. This multifunction sliding switch features 3 slide lock positions and a pushbutton function.
The sliding switch is designed for a number of operations in compliance with
EN61131T2.
The switch must be set to the top or center position. The user can disregard the bottom position.
Table 18: Operating Mode Selector Switch Positions, Static Positions for PowerOn/Reset
Positions of the mode selector switch
Top position
Center position
Function
These switch positions are important only in the configuration mode.
For a detailed description of the configuration options refer to the
Section “Device Description” > … > “Manual Configuration”.
Bottom position Do not use. This position is not relevant for the user.
The fieldbus coupler performs the following functions if a position change of the switch is performed during ongoing operation:
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44 Device Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 19: Mode Selector Switch Positions, Dynamic Positions During the Current Operation
Position change of the mode selector switch
Function
From the top to the center position
No reaction.
*)
From the center to the top position
No reaction.
*)
From the center to the bottom position
No reaction.
The switch may not be at the bottom position during a PowerOn. The user can disregard a change to this position.
No reaction. From the bottom to the center position
Press down
(e.g., using a screwdriver)
Hardware reset. The fieldbus coupler restarts.
All outputs are reset
A hardware reset can be performed at any position of the mode selector switch.
Fieldbus coupler restart.
*) Settings are applied during manual configuration by moving the operating mode selector switch from the center to the top position and then back to the center position.
4.4.3 Rotary Encoder Switch
Station address from 1 to 247 can be set using the two hexadecimal rotary encoder switches. The configuration or programming mode can also be set using the rotary encoder switch.
Figure 27: Rotary Encoder Switch
10
11
12
13
14
7
8
9
4
5
6
Table 20: Rotary Encoder Switch Positions
Decimal value
0
Switch setting "x1" Switch setting "x10" Result
0 0 Configuration/Programming mode (serial)
1
2
3
1
2
3
0
0
0
Slave address/Station address 1
Slave address/Station address 2
Slave address/Station address 3
4
5
6
7
8
9
0
0
0
0
0
0
Slave address/Station address 4
Slave address/Station address 5
Slave address/Station address 6
Slave address/Station address 7
Slave address/Station address 8
Slave address/Station address 9
A-
B
C
D
E
0
0
0
0
0
Slave address/Station address 10
Slave address/Station address 11
Slave address/Station address 12
Slave address/Station address 13
Slave address/Station address 14
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Device Description 45
1
2
3
4
5
E
F
0
B
C
D
8
9
A-
6
7
8
9
A-
5
6
7
2
3
4
D
E
F
0
1
A-
B
C
62
63
64
65
66
67
68
69
56
57
58
59
60
61
70
71
72
73
74
50
51
52
53
54
55
42
43
44
45
46
47
48
49
34
35
36
37
38
39
40
41
25
26
27
28
29
30
31
32
33
19
20
21
22
23
24
Table 20: Rotary Encoder Switch Positions
Decimal value
15
Switch setting "x1" Switch setting "x10" Result
F 0 Slave address/Station address 15
16
17
18
0
1
2
1
1
1
Slave address/Station address 16
Slave address/Station address 17
Slave address/Station address 18
3
4
5
6
7
8
1
1
1
1
1
1
Slave address/Station address 19
Slave address/Station address 20
Slave address/Station address 21
Slave address/Station address 22
Slave address/Station address 23
Slave address/Station address 24
9
A-
B
C
D
E
F
0
1
2
3
4
5
6
7
8
9
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
Slave address/Station address 25
Slave address/Station address 26
Slave address/Station address 27
Slave address/Station address 28
Slave address/Station address 29
Slave address/Station address 30
Slave address/Station address 31
Slave address/Station address 32
Slave address/Station address 33
Slave address/Station address 34
Slave address/Station address 35
Slave address/Station address 36
Slave address/Station address 37
Slave address/Station address 38
Slave address/Station address 39
Slave address/Station address 40
Slave address/Station address 41
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
Slave address/Station address 42
Slave address/Station address 43
Slave address/Station address 44
Slave address/Station address 45
Slave address/Station address 46
Slave address/Station address 47
Slave address/Station address 48
Slave address/Station address 49
Slave address/Station address 50
Slave address/Station address 51
Slave address/Station address 52
Slave address/Station address 53
Slave address/Station address 54
Slave address/Station address 55
Slave address/Station address 56
Slave address/Station address 57
Slave address/Station address 58
Slave address/Station address 59
Slave address/Station address 60
Slave address/Station address 61
Slave address/Station address 62
Slave address/Station address 63
Slave address/Station address 64
Slave address/Station address 65
Slave address/Station address 66
Slave address/Station address 67
Slave address/Station address 68
Slave address/Station address 69
Slave address/Station address 70
Slave address/Station address 71
Slave address/Station address 72
Slave address/Station address 73
Slave address/Station address 74
Manual
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46 Device Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
D
E
F
0
1
A-
B
C
7
8
9
4
5
6
2
3
4
5
6
1
2
3
E
F
0
6
7
8
9
A-
B
C
D
122
123
124
125
126
127
128
129
116
117
118
119
120
121
130
131
132
133
134
110
111
112
113
114
115
102
103
104
105
106
107
108
109
94
95
96
97
98
99
100
101
85
86
87
88
89
90
91
92
93
79
80
81
82
83
84
Table 20: Rotary Encoder Switch Positions
Decimal value
75
Switch setting "x1" Switch setting "x10" Result
B 4 Slave address/Station address 75
76
77
78
C
D
E
4
4
4
Slave address/Station address 76
Slave address/Station address 77
Slave address/Station address 78
F
0
1
2
3
4
4
5
5
5
5
5
Slave address/Station address 79
Slave address/Station address 80
Slave address/Station address 81
Slave address/Station address 82
Slave address/Station address 83
Slave address/Station address 84
5
6
7
8
9
A-
B
C
D
E
F
0
1
2
3
4
5
5
5
5
5
5
5
5
5
5
5
5
6
6
6
6
6
6
Slave address/Station address 85
Slave address/Station address 86
Slave address/Station address 87
Slave address/Station address 88
Slave address/Station address 89
Slave address/Station address 90
Slave address/Station address 91
Slave address/Station address 92
Slave address/Station address 93
Slave address/Station address 94
Slave address/Station address 95
Slave address/Station address 96
Slave address/Station address 97
Slave address/Station address 98
Slave address/Station address 99
Slave address/Station address 100
Slave address/Station address 101
6
6
6
6
6
6
6
6
6
6
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
8
8
8
8
8
8
8
Slave address/Station address 102
Slave address/Station address 103
Slave address/Station address 104
Slave address/Station address 105
Slave address/Station address 106
Slave address/Station address 107
Slave address/Station address 108
Slave address/Station address 109
Slave address/Station address 110
Slave address/Station address 111
Slave address/Station address 112
Slave address/Station address 113
Slave address/Station address 114
Slave address/Station address 115
Slave address/Station address 116
Slave address/Station address 117
Slave address/Station address 118
Slave address/Station address 119
Slave address/Station address 120
Slave address/Station address 121
Slave address/Station address 122
Slave address/Station address 123
Slave address/Station address 124
Slave address/Station address 125
Slave address/Station address 126
Slave address/Station address 127
Slave address/Station address 128
Slave address/Station address 129
Slave address/Station address 130
Slave address/Station address 131
Slave address/Station address 132
Slave address/Station address 133
Slave address/Station address 134
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Device Description 47
6
7
8
9
A-
B
C
D
3
4
5
0
1
2
E
F
0
1
2
D
E
F
A-
B
C
5
6
7
8
9
2
3
4
182
183
184
185
186
187
188
189
176
177
178
179
180
181
190
191
192
193
194
170
171
172
173
174
175
162
163
164
165
166
167
168
169
154
155
156
157
158
159
160
161
145
146
147
148
149
150
151
152
153
139
140
141
142
143
144
Table 20: Rotary Encoder Switch Positions
Decimal value
135
Switch setting "x1" Switch setting "x10" Result
7 8 Slave address/Station address 135
136
137
138
8
9
A-
8
8
8
Slave address/Station address 136
Slave address/Station address 137
Slave address/Station address 138
B
C
D
E
F
0
8
8
8
8
8
9
Slave address/Station address 139
Slave address/Station address 140
Slave address/Station address 141
Slave address/Station address 142
Slave address/Station address 143
Slave address/Station address 144
1
2
3
4
5
6
7
8
9
A-
B
C
D
E
F
0
1
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
A-
A-
Slave address/Station address 145
Slave address/Station address 146
Slave address/Station address 147
Slave address/Station address 148
Slave address/Station address 149
Slave address/Station address 150
Slave address/Station address 151
Slave address/Station address 152
Slave address/Station address 153
Slave address/Station address 154
Slave address/Station address 155
Slave address/Station address 156
Slave address/Station address 157
Slave address/Station address 158
Slave address/Station address 159
Slave address/Station address 160
Slave address/Station address 161
A-
A-
A-
A-
A-
A-
A-
A-
A-
A-
A-
A-
A-
A-
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
C
C
C
Slave address/Station address 162
Slave address/Station address 163
Slave address/Station address 164
Slave address/Station address 165
Slave address/Station address 166
Slave address/Station address 167
Slave address/Station address 168
Slave address/Station address 169
Slave address/Station address 170
Slave address/Station address 171
Slave address/Station address 172
Slave address/Station address 173
Slave address/Station address 174
Slave address/Station address 175
Slave address/Station address 176
Slave address/Station address 177
Slave address/Station address 178
Slave address/Station address 179
Slave address/Station address 180
Slave address/Station address 181
Slave address/Station address 182
Slave address/Station address 183
Slave address/Station address 184
Slave address/Station address 185
Slave address/Station address 186
Slave address/Station address 187
Slave address/Station address 188
Slave address/Station address 189
Slave address/Station address 190
Slave address/Station address 191
Slave address/Station address 192
Slave address/Station address 193
Slave address/Station address 194
Manual
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48 Device Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
5
6
7
F
2
3
4
F
0
1
C
D
E
6
7
8
9
A-
B
1
2
3
4
5
E
F
0
242
243
244
245
246
247
255
236
237
238
239
240
241
230
231
232
233
234
235
222
223
224
225
226
227
228
229
214
215
216
217
218
219
220
221
205
206
207
208
209
210
211
212
213
199
200
201
202
203
204
Table 20: Rotary Encoder Switch Positions
Decimal value
195
Switch setting "x1" Switch setting "x10" Result
3 C Slave address/Station address 195
196
197
198
4
5
6
C
C
C
Slave address/Station address 196
Slave address/Station address 197
Slave address/Station address 198
7
8
9
A-
B
C
C
C
C
C
C
C
Slave address/Station address 199
Slave address/Station address 200
Slave address/Station address 201
Slave address/Station address 202
Slave address/Station address 203
Slave address/Station address 204
D
E
F
0
1
2
3
4
5
6
7
8
9
A-
B
C
D
C
C
C
D
D
D
D
D
D
D
D
D
D
D
D
D
D
Slave address/Station address 205
Slave address/Station address 206
Slave address/Station address 207
Slave address/Station address 208
Slave address/Station address 209
Slave address/Station address 210
Slave address/Station address 211
Slave address/Station address 212
Slave address/Station address 213
Slave address/Station address 214
Slave address/Station address 215
Slave address/Station address 216
Slave address/Station address 217
Slave address/Station address 218
Slave address/Station address 219
Slave address/Station address 220
Slave address/Station address 221
D
D
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
F
F
F
F
F
F
F
F
F
Slave address/Station address 222
Slave address/Station address 223
Slave address/Station address 224
Slave address/Station address 225
Slave address/Station address 226
Slave address/Station address 227
Slave address/Station address 228
Slave address/Station address 229
Slave address/Station address 230
Slave address/Station address 231
Slave address/Station address 232
Slave address/Station address 233
Slave address/Station address 234
Slave address/Station address 235
Slave address/Station address 236
Slave address/Station address 237
Slave address/Station address 238
Slave address/Station address 239
Slave address/Station address 240
Slave address/Station address 241
Slave address/Station address 242
Slave address/Station address 243
Slave address/Station address 244
Slave address/Station address 245
Slave address/Station address 246
Slave address/Station address 247
Manual configuration mode, see Section "Device
Description" > … > "Manual Configuration"
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
4.4.3.1 Manual Configuration
Device Description 49
Activate the compatibility mode when replacing the fieldbus coupler!
If a 750-315 or 750-316 fieldbus coupler is replaced with a 750-315/300-000 or
750-316/300-000 fieldbus coupler in a system during ongoing operation, the compatibility mode must be activated when word-by-word access to data is to be provided to binary I/O modules.
Apply parameters set in non-volatile memory!
Parameters set in configuration mode are only applied in non-volatile memory when you exit configuration mode. If you do not exit configuration mode correctly, the settings are discarded!
Exit configuration mode correctly after creating the parameters to apply them!
Discard parameters set incorrectly by users!
You can discard incorrect parameters set during configuration before they are applied in the non-volatile memory.
Proceed as described below to discard parameters:
1. Turn the power supply off.
2. Set the correct station address at the rotary encoder switches if necessary.
3. Turn the power supply on again.
The procedures for manual configuration are described in this section.
1. Switch off the power to the device.
2. Set the value ‘F’ (‘FF’ = station address 255) at both rotary encoder switches.
3. Set the operating mode selector switch to the center position ‘STOP’.
4. Turn the power supply on again.
The device is in configuration mode.
The ON LED is off.
5. Wait until the RxD LED lights up green.
Note: While adjusting the rotary encoder switches, the TxD LED and CRC
LED remain off!
6. Set the parameter to be changed at rotary encoder switch ‘x1’.
Manual
Version 1.0.0
50 Device Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
7. Set a required value at rotary encoder switch ‘x10’.
8. Set the selector switch to the top position ‘RUN’.
9. Wait until the TxD LED (green) and CRC LED (red) light up.
10. Set the selector switch to the center position.
11. Wait until either the TxD LED or the CRC LED goes out.
TxD LED remains lit:
The set combination for the rotary encoder switch is valid.
The setting has been applied.
CRC LED remains lit:
The set combination for the rotary encoder switch is invalid.
The setting has been rejected.
12. Set any further parameters as required using the rotary encoder switch.
Starting at Step 6, repeat the steps described for this above.
To end the configuration mode and apply the settings you must set station address
‘0’ as follows:
1. Set the value ‚0‘ at both rotary encoder switches.
2. Set the selector switch to the top position ‘RUN’.
3. Wait until the TxD LED (green) and CRC LED (red) light up.
4. Set the operating mode selector switch to the center position ‘STOP’.
The settings are applied.
I/O LED flashes red.
The I/O LED and ON LED light up green.
The fieldbus coupler is now in Configuration/Programming mode (station address ‚0‘).
If required, another station address can be set:
1. Switch off the power to the device.
2. Set a station address via the rotary encoder switches.
3. Turn the power supply on again.
The fieldbus coupler accepts the set station address.
Manual
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Device Description 51
Table 21: Manual Configuration
Switch setting "x1" Switch setting "x10" Result
1 Baud Rate Index 0
1
150 baud
300 baud
2
3
4
5
6
7
8
9
600 baud
1200 baud
2400 baud
4800 baud
9600 baud
*)
19200 baud
38400 baud
2 Byte Frame Index
A-
0
1
2
57600 baud
115200 baud
8 Data bits => 1 Stop bit "no parity"
*)
7 Data bits => 2 Stop bits "no parity"
1 Stop bit "even parity"
1 Stop bit "odd parity"
3
4
DataLength
EOF Time Index
3
0
1
0
8 Data bits => 2 Stop bits "no parity"
7 Data bits => 3 Stop bits "no parity"
8 Data bits
*)
7 Data bits
‚Frametime‘
*)
5 Modbus Mode
6 Error Check
7 Disable Watchdog
5
6
7
0
1
2
3
4
1
0
1
0
1
8 Compatibility mode 0
1
100 ms
200 ms
500 ms
1000 ms
1 ms
10 ms
50 ms
ASCII
RTU
*) disabled enabled
*)
Watchdog enabled
*)
Watchdog disabled
Non-compliant response
*)
Compatibility regarding word access to bit values
*)
Factory setting
The settings described in the Section „Manual Configuration“ can also be made using the “WAGO ETHERNET Settings” tool.
Set station address “0” when using “WAGO ETHERNET Settings”!
The configuration interface of the device must be activated for this procedure!
Set station address "0" to activate the configuration interface.
Manual
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52 Device Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 22: Technical Data – Device Data
Width
Height (from upper edge of DIN 35 rail)
51 mm/2.01 in
65 mm
Protection type IP20
Table 23: Technical Data – System Data
Max. number of bus participants
Transmission medium
Bus connection
247 with repeater
Shielded Cu cable 2 (4) x 0,25 mm
2
1 x D-Sub 9; socket
Bus segment length max
5
Baud rate 150 Baud … 115.2 kBaud
Max. number of I/O modules 64
Table 24: Technical Data – Field Wiring
Wire connection CAGE CLAMP
®
Cross section
Stripped lengths
0.08 mm² … 2.5 mm², AWG 28 … 14
8 mm … 9 mm / 0.33 in
Table 25: Technical Data – Power Jumper Contacts
Power jumper contacts Spring contact, self-cleaning
Voltage drop at I max.
< 1 V/64 modules
Table 26: Technical Data – Data Contacts
Data contacts Slide contact, hard gold plated, selfcleaning
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
4.5.4 Climatic Environmental Conditions
Device Description 53
Table 27: Technical Data – Climatic Environmental Conditions
Operating temperature range
Storage temperature range
0 °C … 55 °C
−25 °C … +85 °C
Relative humidity without condensation Max. 95 %
Resistance to harmful substances
Maximum pollutant concentration at relative humidity < 75 %
Special conditions
Acc. to IEC 60068-2-42 and
IEC 60068-2-43
SO
2
≤
25 ppm
H
2
S
≤
10 ppm
Ensure that additional measures for components are taken, which are used in an environment involving:
– dust, caustic vapors or gases
– ionizing radiation
4.5.5 Mechanical Strength acc. to IEC 61131-2
Table 28: Technical Data – Mechanical Strength acc. to IEC 61131-2
Test specification Frequency range Limit value
IEC 60068-2-6 vibration 5 Hz
≤
f < 9 Hz 1.75 mm amplitude (permanent)
3.5 mm amplitude (short term)
9 Hz
≤
f < 150 Hz 0.5 g (permanent)
1 g (short term)
Note on vibration test:
IEC 60068-2-27 shock a) Frequency change: max. 1 octave/minute b) Vibration direction: 3 axes
15 g
Note on shock test: a) A Type of shock: half sine b) Shock duration: 11 ms c) Shock direction: 3x in positive and 3x in negative direction for each of the three mutually perpendicular axes of the test specimen
IEC 60068-2-32 free fall 1 m (module in original packing)
Manual
Version 1.0.0
54 Device Description
4.6 Approvals
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
More information about approvals.
Detailed references to the approvals are listed in the document “Overview
Approvals WAGO-I/O-SYSTEM 750 ”, which you can find via the internet under: www.wago.com
> SERVICES > DOWNLOADS > Additional documentation and information on automation products > WAGO-I/O-SYSTEM
750 > System Description.
The following approvals have been granted to 750-316/300-000 fieldbus coupler/controller:
Conformity Marking
C
UL
US
UL508
Korea Certification MSIP-REM-W43-FBC750
TÜV 07 ATEX 554086 X
I M2 Ex d I Mb
II 3 G Ex nA IIC T4 Gc
II 3 D Ex tc IIIC T135°C Dc
Ambient temperature range:
IECEx TUN 09.0001 X
Ex d I Mb
Ex nA IIC T4 Gc
Ex tc IIIC T135°C Dc
Ambient temperature range:
C
UL
US
ANSI/ISA 12.12.01
Class I, Div2 ABCD T4
0 °C ≤ T
0 °C ≤ T a a
≤ +60 °C
≤ +60 °C
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Device Description 55
The following ship approvals have been granted to 750-316/300-000 fieldbus coupler/controller:
Federal Maritime and Hydrographic Agency
BV (Bureau Veritas)
DNV (Det Norske Veritas) Class B
GL (Germanischer Lloyd)
KR (Korean Register of Shipping)
Cat. A, B, C, D (EMC 1)
NKK (Nippon Kaiji Kyokai)
PRS (Polski Rejestr Statków)
RINA (Registro Italiano Navale)
Manual
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56 Device Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
4.7 Standards and Guidelines
750-316/300-000 meets the following requirements on emission and immunity of interference:
EMC CE-Immunity to interference acc. to EN 61000-6-2: 2005
EMC CE-Emission of interference acc. to EN 61000-6-4: 2007
750-316/300-000 meets the following requirements on emission and immunity of interference:
EMC marine applications-Immunity to interference acc. to Germanischer Lloyd (2003)
EMC marine applications-Emission of interference acc. to Germanischer Lloyd (2003)
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
5 Mounting
Mounting 57
5.1 Installation Position
Along with horizontal and vertical installation, all other installation positions are allowed.
Use an end stop in the case of vertical mounting!
In the case of vertical assembly, an end stop has to be mounted as an additional safeguard against slipping.
WAGO order no. 249-116 End stop for DIN 35 rail, 6 mm wide
WAGO order no. 249-117 End stop for DIN 35 rail, 10 mm wide
5.2 Overall Configuration
The maximum total length of a fieldbus node without fieldbus coupler/controller is 780 mm including end module. The width of the end module is 12 mm. When assembled, the I/O modules have a maximum length of 768 mm.
Examples:
• 64 I/O modules with a 12 mm width can be connected to a fieldbus coupler/controller.
• 32 I/O modules with a 24 mm width can be connected to a fieldbus coupler/controller.
Exception:
The number of connected I/O modules also depends on the type of fieldbus coupler/controller is used. For example, the maximum number of stackable I/O modules on one PROFIBUS DP/V1 fieldbus coupler/controller is 63 with no passive I/O modules and end module.
Observe maximum total length of a fieldbus node!
The maximum total length of a fieldbus node without fieldbus coupler/controller and without using a 750-628 I/O Module (coupler module for internal data bus extension) may not exceed 780 mm.
Also note the limitations of individual fieldbus couplers/controllers.
Manual
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58 Mounting
Increase the total length using a coupler module for internal data bus extension!
You can increase the total length of a fieldbus node by using a 750-628 I/O
Module (coupler module for internal data bus extension). For such a configuration, attach a 750-627 I/O Module (end module for internal data bus extension) after the last I/O module of a module assembly. Use an RJ-45 patch cable to connect the I/O module to the coupler module for internal data bus extension of another module block.
This allows you to segment a fieldbus node into a maximum of 11 blocks with maximum of 10 I/O modules for internal data bus extension.
The maximum cable length between two blocks is five meters.
More information is available in the manuals for the 750-627 and 750-628 I/O
Modules.
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Mounting 59
5.3 Mounting onto Carrier Rail
5.3.1 Carrier Rail Properties
All system components can be snapped directly onto a carrier rail in accordance with the European standard EN 50022 (DIN 35).
Do not use any third-party carrier rails without approval by WAGO!
WAGO Kontakttechnik GmbH & Co. KG supplies standardized carrier rails that are optimal for use with the I/O system. If other carrier rails are used, then a technical inspection and approval of the rail by WAGO Kontakttechnik GmbH &
Co. KG should take place.
Carrier rails have different mechanical and electrical properties. For the optimal system setup on a carrier rail, certain guidelines must be observed:
• The material must be non-corrosive.
• Most components have a contact to the carrier rail to ground electromagnetic disturbances. In order to avoid corrosion, this tin-plated carrier rail contact must not form a galvanic cell with the material of the carrier rail which generates a differential voltage above 0.5 V (saline solution of 0.3 % at 20°C).
• The carrier rail must optimally support the EMC measures integrated into the system and the shielding of the I/O module connections.
• A sufficiently stable carrier rail should be selected and, if necessary, several mounting points (every 20 cm) should be used in order to prevent bending and twisting (torsion).
• The geometry of the carrier rail must not be altered in order to secure the safe hold of the components. In particular, when shortening or mounting the carrier rail, it must not be crushed or bent.
• The base of the I/O components extends into the profile of the carrier rail.
For carrier rails with a height of 7.5 mm, mounting points are to be riveted under the node in the carrier rail (slotted head captive screws or blind rivets).
• The medal springs on the bottom of the housing must have low-impedance contact with the DIN rail (wide contact surface is possible).
Manual
Version 1.0.0
60 Mounting
5.3.2 WAGO DIN Rail
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
WAGO carrier rails meet the electrical and mechanical requirements shown in the table below.
Table 29: WAGO DIN Rail
Order number Description
210-113 /-112 35 x 7.5; 1 mm; steel yellow chromated; slotted/unslotted
210-114 /-197
210-118
210-198
210-196
35 x 15; 1.5 mm; steel yellow chromated; slotted/unslotted
35 x 15; 2.3 mm; steel yellow chromated; unslotted
35 x 15; 2.3 mm; copper; unslotted
35 x 7.5; 1 mm; aluminum; unslotted
5.4 Spacing
The spacing between adjacent components, cable conduits, casing and frame sides must be maintained for the complete fieldbus node.
Figure 28: Spacing
The spacing creates room for heat transfer, installation or wiring. The spacing to cable conduits also prevents conducted electromagnetic interferences from influencing the operation.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Mounting 61
5.5 Mounting Sequence
Fieldbus couplers/controllers and I/O modules of the WAGO-I/O-SYSTEM 750 are snapped directly on a carrier rail in accordance with the European standard EN
50022 (DIN 35).
The reliable positioning and connection is made using a tongue and groove system. Due to the automatic locking, the individual devices are securely seated on the rail after installation.
Starting with the fieldbus coupler/controller, the I/O modules are mounted adjacent to each other according to the project design. Errors in the design of the node in terms of the potential groups (connection via the power contacts) are recognized, as the I/O modules with power contacts (blade contacts) cannot be linked to I/O modules with fewer power contacts.
Risk of injury due to sharp-edged blade contacts!
The blade contacts are sharp-edged. Handle the I/O module carefully to prevent injury.
Insert I/O modules only from the proper direction!
All I/O modules feature grooves for power jumper contacts on the right side. For some I/O modules, the grooves are closed on the top. Therefore, I/O modules featuring a power jumper contact on the left side cannot be snapped from the top.
This mechanical coding helps to avoid configuration errors, which may destroy the I/O modules. Therefore, insert I/O modules only from the right and from the top.
Don't forget the bus end module!
Always plug a bus end module 750-600 onto the end of the fieldbus node! You must always use a bus end module at all fieldbus nodes with WAGO-I/O-
SYSTEM 750 fieldbus couplers/controllers to guarantee proper data transfer.
Manual
Version 1.0.0
62 Mounting WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
5.6 Inserting and Removing Devices
Perform work on devices only if they are de-energized!
Working on energized devices can damage them. Therefore, turn off the power supply before working on the devices.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Mounting 63
5.6.1 Inserting the Fieldbus Coupler/Controller
1. When replacing the fieldbus coupler/controller for an already available fieldbus coupler/controller, position the new fieldbus coupler/controller so that the tongue and groove joints to the subsequent I/O module are engaged.
2. Snap the fieldbus coupler/controller onto the carrier rail.
3. Use a screwdriver blade to turn the locking disc until the nose of the locking disc engages behind the carrier rail (see the following figure). This prevents the fieldbus coupler/controller from canting on the carrier rail.
With the fieldbus coupler/controller snapped in place, the electrical connections for the data contacts and power contacts (if any) to the possible subsequent I/O module are established.
Figure 29: Release Tab Standard Fieldbus Coupler/Controller (Example)
5.6.2 Removing the Fieldbus Coupler/Controller
1. Use a screwdriver blade to turn the locking disc until the nose of the locking disc no longer engages behind the carrier rail.
2. Remove the fieldbus coupler/controller from the assembly by pulling the release tab.
Electrical connections for data or power contacts to adjacent I/O modules are disconnected when removing the fieldbus coupler/controller.
Manual
Version 1.0.0
64 Mounting WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
5.6.3 Inserting the I/O Module
1. Position the I/O module so that the tongue and groove joints to the fieldbus coupler/controller or to the previous or possibly subsequent I/O module are engaged.
Figure 30: Insert I/O Module (Example)
2. Press the I/O module into the assembly until the I/O module snaps into the carrier rail.
Figure 31: Snap the I/O Module into Place (Example)
With the I/O module snapped in place, the electrical connections for the data contacts and power jumper contacts (if any) to the fieldbus coupler/controller or to the previous or possibly subsequent I/O module are established.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Mounting 65
5.6.4 Removing the I/O Module
1. Remove the I/O module from the assembly by pulling the release tab.
Figure 32: Removing the I/O Module (Example)
Electrical connections for data or power jumper contacts are disconnected when removing the I/O module.
Manual
Version 1.0.0
66 Connect Devices
6 Connect Devices
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
6.1 Data Contacts/Internal Bus
Communication between the fieldbus coupler/controller and the I/O modules as well as the system supply of the I/O modules is carried out via the internal bus. It is comprised of 6 data contacts, which are available as self-cleaning gold spring contacts.
Figure 33: Data Contacts
Do not place the I/O modules on the gold spring contacts!
Do not place the I/O modules on the gold spring contacts in order to avoid soiling or scratching!
Ensure that the environment is well grounded!
The devices are equipped with electronic components that may be destroyed by electrostatic discharge. When handling the devices, ensure that the environment
(persons, workplace and packing) is well grounded. Avoid touching conductive components, e.g. data contacts.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
6.2 Power Contacts/Field Supply
Connect Devices 67
Risk of injury due to sharp-edged blade contacts!
The blade contacts are sharp-edged. Handle the I/O module carefully to prevent injury.
Self-cleaning power jumper contacts used to supply the field side are located on the right side of most of the fieldbus couplers/controllers and on some of the I/O modules. These contacts come as touch-proof spring contacts. As fitting counterparts the I/O modules have male contacts on the left side.
Figure 34: Example for the Arrangement of Power Contacts
Field bus node configuration and test via smartDESIGNER
With the WAGO ProServe
®
Software smartDESIGNER, you can configure the structure of a field bus node. You can test the configuration via the integrated accuracy check.
Manual
Version 1.0.0
68 Connect Devices WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
6.3 Connecting a Conductor to the CAGE CLAMP
®
The WAGO CAGE CLAMP
®
connection is appropriate for solid, stranded and finely stranded conductors.
Only connect one conductor to each CAGE CLAMP
®
!
Only one conductor may be connected to each CAGE CLAMP
®
.
Do not connect more than one conductor at one single connection!
If more than one conductor must be routed to one connection, these must be connected in an up-circuit wiring assembly, for example using WAGO feedthrough terminals.
Exception:
If it is unavoidable to jointly connect 2 conductors, then you must use a ferrule to join the wires together. The following ferrules can be used:
Length:
Nominal cross section
WAGO product:
max.
:
8 mm
1 mm
2
for 2 conductors with 0.5 mm
2
each
216-103 or products with comparable properties
1. For opening the CAGE CLAMP
®
insert the actuating tool into the opening above the connection.
2. Insert the conductor into the corresponding connection opening.
3. For closing the CAGE CLAMP
®
simply remove the tool. The conductor is now clamped firmly in place.
Figure 35: Connecting a Conductor to a CAGE CLAMP
®
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
7 Function Description
Function Description 69
7.1 Startup of the Fieldbus Coupler
The mode selector switch may not be located in the lower position!
The operating mode selector switch may not be set to the bottom position if startup is to be performed!
Once the master switch has been configured and the fieldbus coupler and the I/O modules have been electrically installed, the fieldbus node starts running.
After the power supply has been switched on, or after a reset, the fieldbus coupler executes an initialization phase. In the initialization phase, the firmware for the fieldbus coupler is started first.
During the firmware start, the I/O LED is flashes orange.
After this, the fieldbus coupler determines the information from the connected I/O modules that is required to run the fieldbus node. During this phase, the I/O LED will flash red.
After a trouble-free startup, the fieldbus coupler enters the “INIT” status and the
I/O LED is green.
If an error occurs during start up, an error message is indicated by a blink code.
Figure 36: Starting Up of the Fieldbus Coupler
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70 Function Description
More information about the LED Signaling
Read the detailed description for the evaluation of the displayed LED state in the section “Diagnostics” > … > “LED Signaling”.
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Manual
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
7.2 Process Data Architecture
Function Description 71
7.2.1 Basic Setup
After switching on the fieldbus coupler, it identifies all I/O modules of the node that send or expect to receive data (data/bit width > 0). Any number of analog input/output modules and digital input/output modules can be arranged within a node.
Additional Information
For the number of input and output bits or bytes of the individual I/O modules, refer to the corresponding description of the I/O modules.
The coupler creates an internal local process image on the basis of the data width, the type of I/O module and the position of the module in the node. This process image is separated into input and output data range.
The data of the digital input/output modules is bit-oriented, i.e., data is exchanged bit by bit. The analog I/O bus modules represent all byte-oriented bus modules, which send data byte by byte.
This group includes: counter modules, angle and distance measurement modules and communication modules.
For both, the local input and output process image, the I/O module data is stored in the corresponding process image depending on the order in which the modules are connected to the coupler.
Hardware changes can result in changes of the process image!
If the hardware configuration is changed by adding, changing or removing of I/O modules with a data width > 0 bit, this result in a new process image structure.
The process data addresses would then change. If adding modules, the process data of all previous modules has to be taken into account.
A memory range of 256 words (Word 0 ... 255) is initially available in the fieldbus coupler for the process image of the physical input and output data.
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7.2.2 Example of an Input Process Image
The following figure is an example of an input process image with input module data.
The configuration is comprised of 16 digital and 8 analog inputs.
Thus, input process image has a data length of 8 words for the analog I/O modules and 1 word for the digital modules; i.e., 9 words in total.
Figure 37: Example of an Input Process Image
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750-316/300-000 Fieldbus Coupler MODBUS RTU
7.2.3 Example of an Output Process Image
Function Description 73
The following example for the output process image with output module data consists of 2 digital and 4 analog outputs.
The output data process image for register access comprises 4 words for the analog outputs and 1 word for the digital outputs; i.e., 5 words in total.
Write access to output data is possible starting from MODBUS address 0x0000.
In divergence from the MODBUS standard, an offset of 200hex (0x0200) must be added to the MODBUS address for read access to output data. Output data can be read back in under the same addresses both with the MODBUS functions for read access to output data (FC1, FC3, FC23) and with the MODBUS functions for read access to input data (FC2, FC4).
Figure 38: Example of an Output Image
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74 Function Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
7.2.4 Process Data MODBUS RTU
For some I/O modules (and their variations), the structure of the process data depends on the fieldbus.
The internal mapping method for data greater than one byte conforms to Intel formats.
Additional information about the fieldbus-specific process data structure
For the respective fieldbus-specific structure of the process values of any I/O module within the 750 or 753 Series of the WAGO-I/O-SYSTEM, refer to
Section “Structure of Process Data for MODBUS RTU”.
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Function Description 75
7.3 Data Exchange
The MODBUS RTU protocol is used for exchange of process data for the fieldbus coupler 750-315/300-000 .
MODBUS RTU operates according to the master/slave principle. The master is a higher-level controller, e.g., a PC or a PLC.
The WAGO-I/O-SYSTEM 750 fieldbus couplers are slave devices.
The master requests communication. This request can be directed to certain nodes by addressing. The nodes receive the request and, depending on the request type, send a reply to the master.
The maximum number of simultaneous connections can not be exceeded. Existing connections must first be terminated before new ones can be set up. The Fieldbus
Coupler MODBUS RTU is essentially equipped with two interfaces for data exchange:
• the interface to the fieldbus (Master)
• the interface to the I/O modules.
Data exchange takes place between the fieldbus master and the I/O modules.
If MODBUS is used as the fieldbus, access is made to the data using a MODBUS function implemented in the fieldbus coupler.
7.3.1 Memory Space
Figure 39: Memory Areas and Data Exchange
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76 Function Description WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
The fieldbus coupler’s process image contains the physical data for the bus modules.
These have a value of 0 ... 255.
1 The input module data can be read from the fieldbus side.
2 Likewise, data can be written to the output modules from the fieldbus side.
In addition, all output data is mirrored to a memory area with the address offset
0x0200. This makes it possible to read back output values by adding 0x0200 to the MODBUS address.
7.3.2 Addressing
Module inputs and outputs in a fieldbus coupler are addressed internally as soon as they are started. The order in which the connected modules are addressed depends on the type of module that is connected (input module, output module).
The process image is formed from these addresses.
The physical arrangement of the I/O modules in the fieldbus node is arbitrary.
7.3.2.1 Adressing the I/O Modules
Addressing references the complex I/O modules (modules which occupy one or more bytes) first in accordance with their physical placement downstream of the fieldbus coupler/controller. Consequently, these modules occupy addresses starting from word 0.
This is followed by the data for the remaining I/O modules (bit-oriented I/O modules), always indicates in bytes. In this process, byte by byte is filled with this data in the physical order. As soon as a complete byte is occupied by the bitoriented I/O modules, the process begins automatically with the next byte.
Hardware changes can result in changes of the process image!
If a hardware configuration is changed or expanded, this may result in a new process image structure. In this case, the process data addresses also change. In case of an expansion, the process data of all previous I/O modules has to be taken into account.
Observe process data quantity!
For the number of input and output bits or bytes of the individual I/O modules, please refer to the corresponding descriptions of the I/O modules.
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Function Description 77
Table 30: Data Width of the I/O Modules (Examples)
Data width ≥ 1 word/channel
Analog input modules
Analog Output Modules
Input modules for thermocouples
Input modules for resistor sensors
Pulse width output modules
Interface modules
Up/down counters
I/O modules for angle and distance measurement
Data width = 1 bit/channel
Digital Input Modules
Digital Output Modules
Digital output modules with diagnostics (2 bits/channel)
Supply modules with fuse carrier/diagnostics
Solid-state load relays
Relay output modules
7.3.3 Data Exchange between MODBUS RTU Master and I/O
Modules
Data exchange between the MODBUS RTU master and the I/O modules is conducted using the MODBUS functions implemented in the fieldbus coupler/controller via bit-by-bit or word-by-word reading and writing routines.
There are four different types of process data in the fieldbus coupler/controller:
• Input words
• Output words
• Input bits
• Output bits
Word-by-word access to the digital I/O modules is performed in accordance with the following table:
Table 31: Assignment of Digital Inputs and Outputs to Process Data Words According to the Intel
Format
Digital
Inputs/
Outputs
16. 15. 14. 13. 12. 11. 10. 9. 8. 7. 6. 5. 4. 3. 2. 1.
Process Data
Word
Byte
Bit
15
Bit
14
Bit
13
Bit
12
Bit
11
Bit
10
Bit
9
Bit
8
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
High byte D1 Low byte D0
Outputs can be read back in by adding an offset of 200
hex
(0x0200) to the
MODBUS address.
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Figure 40: Data Exchange Between the MODBUS Master and the I/O Modules
Function registers start at address 0x1000. These registers can be addressed in a similar manner with the MODBUS function codes that are implemented
(read/write).
The specific register address is then specified instead of the address for a module channel.
Additional information
A detailed description of MODBUS addressing is given in the Section “Fieldbus
Communication” > … > “MODBUS Register Mapping”.
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750-316/300-000 Fieldbus Coupler MODBUS RTU
8 Commissioning
Commissioning 79
The various steps required for starting the device are explained in this documentation in the following sections.
The procedure for making electrical connections is described in the Section
“Connecting the Devices”.
The procedure for configuring for operation is elucidated in the Section “Device
Description” > … > “Rotary Encoder Switch” > “Manual Configuration”. This section contains information about the configuration options that are available and how different configurations can be implemented.
The operating status and malfunctions of the fieldbus coupler/controller are indicated by LEDs. The meaning of the LEDs and their flashing response is explained in the Section “Diagnostics” > … > “LED Signaling”.
To restore the factory settings, proceed as follows:
1. Switch off the supply voltage of the fieldbus coupler.
2. Connect the communication cable 750-920 respectively 750-923 to the configuration interface of the fieldbus coupler and to your computer.
3. Switch on the supply voltage of the fieldbus coupler.
4 Start the WAGO-ETHERNET-Settings/Modbus-Settings program.
5. In the top menu bar, select [Factory Settings] and click [Yes] to confirm.
A restart of the fieldbus node is implemented automatically. The start takes place with the default settings.
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80 Diagnostics
9 Diagnostics
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
9.1 LED Signaling
For on-site diagnostics, the fieldbus coupler has several LEDs that indicate the operational status of the fieldbus coupler or the entire node (see following figure).
Figure 41: Display Elements
The diagnostics displays and their significance are explained in detail in the following section.
The LEDs are assigned in groups to the various diagnostics areas:
Table 32: LED Assignment for Diagnostics
Diagnostics area LEDs
Fieldbus status
Node status
Status Supply Voltage
• ON
• TxD
• RxD
• CRC
• I/O
• A (system supply)
• B (field supply)
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Diagnostics 81
9.1.1 Evaluating Fieldbus Status
Communication status via the fieldbus is indicated by the top LED group (ON,
TxD, RxD and CRC).
Table 33: Fieldbus Diagnostics – Solution in Event of Error
LED
Status
Explanation Remedy
ON green
OFF
TxD/RxD
Initialization OK
Initialization failed, no function or self-test
-
1. Check the power supply (24 V, 0
V) and the IP configuration. green
OFF
Data is being exchanged via the
RS-232 interface.
No data is being exchanged via the
RS-232 interface.
-
-
CRC red
OFF
Checksum error in the received
MODBUS telegram
Nor error, normal operation
1. Check the serial connection or the interface parameters.
-
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9.1.2 Evaluating Node Status – I/O LED (Blink Code Table)
The communication status between fieldbus coupler/controller and the I/O modules is indicated by the I/O LED.
Table 34: Node Status Diagnostics – Solution in Event of Error
LED Status Meaning Solution
I/O green The fieldbus node is operating correctly. Normal operation. orange flashing red red flashing red cyclical flashing
Start of the firmware.
1 … 2 seconds of rapid flashing indicate start-up.
Coupler/controller hardware defect
Flashing with approx.. 10 Hz indicates the initialization of the internal bus or of a internal bus error.
-
Replace the fieldbus coupler/controller.
Note the following flashing sequence.
Up to three successive flashing sequences indicate internal data bus errors. There are short intervals between the sequences.
Evaluate the flashing sequences based on the following blink code table.
The blinking indicates an error message comprised of an error code and error argument. off
No data cycle on the internal bus. The fieldbus coupler/controller supply is off.
Device boot-up occurs after turning on the power supply. The I/O LED flashes orange.
Then the bus is initialized. This is indicated by flashing red at 10 Hz for
1 … 2 seconds.
After a trouble-free initialization, the I/O LED is green.
In the event of an error, the I/O LED continues to blink red. Blink codes indicate detailed error messages. An error is indicated cyclically by up to 3 flashing sequences.
After elimination of the error, restart the node by turning the power supply of the device off and on again.
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Diagnostics 83
Figure 42: Node Status – I/O LED Signaling
Figure 43: Error Message Coding
Example of a module error:
• The I/O LED starts the error display with the first flashing sequence
(approx. 10 Hz).
• After the first break, the second flashing sequence starts (approx. 1 Hz):
The I/O LED blinks four times.
Error code 4 indicates “data error internal data bus”.
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• After the second break, the third flashing sequence starts (approx. 1 Hz):
The I/O LED blinks twelve times.
Error argument 12 means that the internal data bus is interrupted behind the twelfth I/O module.
The thirteenth I/O module is either defective or has been pulled out of the assembly.
Table 35: Blink Code- Table for the I/O LED Signaling, Error Code 1
Error code 1: “Hardware and configuration error”
Error
Argument
Error Description Solution
-
Invalid check sum in the parameter area of the fieldbus controller.
1. Turn off the power supply for the node.
2. Replace the fieldbus controller.
3. Turn the power supply on again.
1
Overflow of the internal buffer memory for the attached I/O modules.
1. Turn off the power for the node.
2. Reduce the number of I/O modules.
3. Turn the power supply on again.
4. If the error persists, replace the fieldbus controller.
2
I/O module(s) with unknown data type
1. Determine the faulty I/O module by first turning off the power supply.
2. Plug the end module into the middle of the node.
3. Turn the power supply on again.
4. - LED continues to flash? -
Turn off the power supply and plug the end module into the middle of the first half of the node (toward the fieldbus controller).
- LED not flashing? -
Turn off the power and plug the end module into the middle of the second half of the node (away from the fieldbus controller).
5. Turn the power supply on again.
6. Repeat the procedure described in step 4 while halving the step size until the faulty I/O module is detected.
7. Replace the faulty I/O module.
8. Inquire about a firmware update for the fieldbus controller.
3
Unknown module type of the
Flash program memory
1. Turn off the power supply for the node.
2. Replace the fieldbus controller.
3. Turn the power supply on again.
4
Fault when writing in the Flash program memory.
1. Turn off the power supply for the node.
2. Replace the fieldbus controller.
3. Turn the power supply on again.
5
Fault when deleting the Flash memory.
1. Turn off the power supply for the node.
2. Replace the fieldbus controller.
3. Turn the power supply on again.
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Diagnostics 85
Table 35: Blink Code- Table for the I/O LED Signaling, Error Code 1
Error code 1: “Hardware and configuration error”
Error
Argument
Error Description Solution
6
The I/O module configuration after
AUTORESET differs from the configuration determined the last time the fieldbus controller was powered up.
1. Restart the fieldbus controller by turning the power supply off and on.
7
Fault when writing in the serial EEPROM.
1. Turn off the power supply for the node.
2. Replace the fieldbus controller.
3. Turn the power supply on again.
8
Invalid hardwarefirmware combination.
1. Turn off the power supply for the node.
2. Replace the fieldbus controller.
3. Turn the power supply on again.
9
Invalid check sum in the serial EEPROM.
1. Turn off the power supply for the node.
2. Replace the fieldbus controller.
3. Turn the power supply on again.
10
Serial EEPROM initialization error
1. Turn off the power supply for the node.
2. Replace the fieldbus controller.
3. Turn the power supply on again.
11
Fault when reading in the serial
EEPROM.
1. Turn off the power supply for the node.
2. Replace the fieldbus controller.
3. Turn the power supply on again.
12
Timeout during access on the serial
EEPROM
1. Turn off the power supply for the node.
2. Replace the fieldbus controller.
3. Turn the power supply on again.
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14
Maximum number of gateway or mailbox modules exceeded
1. Turn off the power for the node.
2. Reduce the number of corresponding modules to a valid number.
3. Turn the power supply on again.
Table 36: Blink Code Table for the I/O LED Signaling, Error Code 2
Error code 2: -not used-
Error
Argument
Error Description Solution
- Not used -
86 Diagnostics WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 37: Blink Code Table for the I/O LED Signaling, Error Code 3
Error code 3: “Protocol error, internal bus”
Error
Argument
Error Description Solution
-
Internal data bus communication is faulty, defective module cannot be identified.
- Are passive power supply modules (750-613) located in the node? -
1. Check that these modules are supplied correctly with power.
2. Determine this by the state of the associated status LEDs.
- Are all modules connected correctly or are there any
750-613 Modules in the node? -
1. Determine the faulty I/O module by turning off the power supply.
2. Plug the end module into the middle of the node.
3. Turn the power supply on again.
4. - LED continues to flash? -
Turn off the power supply and plug the end module into the middle of the first half of the node (toward the fieldbus coupler).
- LED not flashing? -
Turn off the power and plug the end module into the middle of the second half of the node (away from the fieldbus coupler).
5. Turn the power supply on again.
6. Repeat the procedure described in step 4 while halving the step size until the faulty I/O module is detected.
7. Replace the faulty I/O module.
8. If there is only one I/O module on the fieldbus coupler and the LED is flashing, either the I/O module or fieldbus coupler is defective. Replace the I/O module with a pretested, properly functioning I/O module. If the LED no longer flashes, the replaced I/O module was faulty.
Replace this I/O module.
9. If the LED continues to flash, the fieldbus coupler is faulty. Replace the fieldbus coupler.
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Diagnostics 87
Table 38: Blink Code Table for the I/O LED Signaling, Error Code 4
Error code 4: “Physical error, internal bus”
Error
Argument
Error Description Solution
-
Internal bus data transmission error or interruption of the internal data bus at the fieldbus coupler
1. Turn off the power supply to the node.
2. Plug the end module behind the fieldbus coupler.
3. Turn the power supply on.
4. Observe the error argument signaled.
- Is no error argument indicated by the I/O LED? -
5. Replace the fieldbus coupler.
- Is an error argument indicated by the I/O LED? -
5. Identify the faulty I/O module by turning off the power supply.
6. Plug the end module into the middle of the node.
7. Turn the power supply on again.
8. - LED continues to flash? -
Turn off the power and plug the end module into the middle of the first half of the node (toward the fieldbus coupler).
- LED not flashing? -
Turn off the power and plug the end module into the middle of the second half of the node (away from the fieldbus coupler).
9. Turn the power supply on again.
10. Repeat the procedure described in step 6 while halving the step size until the faulty I/O module is detected.
11. Replace the faulty I/O module.
12. If there is only one I/O module on the fieldbus coupler and the LED is flashing, either the I/O module or fieldbus coupler is defective. Replace the I/O module with a pretested, properly functioning I/O module. If the LED no longer flashes, the replaced I/O module was faulty.
Replace this I/O module.
13. If the LED continues to flash, the fieldbus coupler is faulty. Replace the fieldbus coupler. n*
Interruption of the internal data bus behind the nth I/O module with process data
1. Turn off the power supply to the node.
2. Replace the (n+1) I/O module containing process data.
3. Turn the power supply on.
* The number of light pulses (n) indicates the position of the I/O module.
I/O modules without data are not counted (e.g., supply modules without diagnostics)
Table 39: Blink Code Table for the I/O LED Signaling, Error Code 5
Error code 5: “Initialization error, internal bus”
Error
Argument
Error Description Solution n*
Error in register communication during internal bus initialization
1. Turn off the power supply to the node.
2. Replace the (n+1) I/O module containing process data.
3. Turn the power supply on.
* The number of light pulses (n) indicates the position of the I/O module.
I/O modules without data are not counted (e.g., supply modules without diagnostics)
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 40: Blink Code Table for the 'I/O' LED Signaling, Error Code 7…8
Error code 7…8: -not used-
Error
Argument
Error Description Solution
- Not used
Table 41: Blink Code Table for the I/O LED Signaling, Error Code 9
Error code 9: “CPU Trap error”
Error
Argument
Error Description Solution
1 Illegal Opcode
2
3
Stack overflow
Stack underflow
Fault in the program sequence.
1. Please contact the I/O Support.
4 NMI
9.1.3 Evaluating Power Supply Status
The power supply unit of the device has two green LEDs that indicate the status of the power supplies.
LED “A” indicates the 24 V supply of the coupler.
LED “B” or “C” reports the power available on the power jumper contacts for field side power.
Table 42: Power Supply Status Diagnostics – Solution in Event of Error
LED Status Meaning Solution
A
Green
Operating voltage for the system is available.
-
Off No power is available for the system
Check the power supply for the system
(24 V and 0 V).
B or C
Green
Off
The operating voltage for power jumper contacts is available.
No operating voltage is available for the power jumper contacts.
-
Check the power supply for the power jumper contacts (24 V and 0 V).
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Diagnostics 89
9.2 Behavior of the Fieldbus Coupler during
Interruption of Operations
An interruption of operation occurs when the fieldbus coupler can no longer exchange process data with the master and/or the I/O modules.
9.2.1 Loss of Power
In the case loss of power outage or falling below the minimum level of the power supply to the fieldbus coupler, the communication with the master and the I/O modules will be interrupted. The I/O modules connected to the fieldbus coupler will switch their output data to a value of “0”.
9.2.2 Loss of Fieldbus
The fieldbus coupler determines that a loss of the fieldbus has occurred when the communication to the master is interrupted. A loss of fieldbus can be caused by losing the master itself or by an interruption in the communication connection.
A loss of fieldbus additionally means that the fieldbus coupler cannot receive any output process data from the master nor can it send any input process data to the master.
During a loss of fieldbus, the fieldbus coupler switches the output signal of the
I/O modules to a value of “0”.
9.2.3 Internal Data Bus Error
The fieldbus coupler determines that an internal data bus error has occurred when the communication with the I/O modules is disrupted or interrupted. An internal data bus error can occur due to the removal e.g. of an I/O module from the fieldbus node.
In addition, an internal data bus error means that the fieldbus coupler cannot exchange any more process data with the I/O modules.
The I/O modules switch their output signals to a value of “0” in the case of an error.
The fieldbus coupler reports an internal data bus error by sending a blink code. To send the blink code, the fieldbus coupler uses the I/O LED.
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90 Fieldbus Communication WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
10 Fieldbus Communication
10.1 MODBUS-Functions
10.1.1 General
MODBUS is a non-vendor-specific, open fieldbus standard for a wide range of applications in production and process automation.
The MODBUS protocol is implemented in accordance with the "MODBUS
APPLICATION PROTOCOL SPECIFICATION V1.1b3" and provides the following functions:
• Provision of the process image
• Provision of the fieldbus variables
• Provision of various settings for the fieldbus coupler/controller via the fieldbus
Additional Information
The structure of a datagram is specific for the individual function. Refer to the descriptions of the MODBUS Function codes.
Information Additional information
More information is available on the Internet at: http://www.modbus.org
The MODBUS protocol is essentially based on the following basic data types:
Table 43: Basic Data Types for the MODBUS Protocol
Data Type
Discrete Inputs
Length
1 bits
Description
Digital inputs:
Coils
Input Register
1 bits
16 bits
Digital outputs:
Analog inputs:
Holding Register 16 bits Analog outputs:
One or more function codes are defined for every basic data type.
Using these functions, the necessary binary input/output data or analog input/output data and internal variables from the fieldbus node can be set or read out directly.
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Fieldbus Communication 91
Reading of outputs with FC1 to FC4 and FC23 is possible by adding an offset!
In divergence from the MODBUS standard, all functions access input and output data in an identical manner for read access. An offset of 200hex (0x0200) must be added to the MODBUS address for read access to output data. For write access to output data either the MODBUS base addresses starting from 0x0000 or the
MODBUS address with an offset of 200hex (0x0200…) may be used equivalently.
Table 44: List of MODBUS Functions Implemented in the Fieldbus Coupler
Function code Function name Type of access and description Access to resources
FC1 0x01
FC2 0x02
Read Coils
Read Discrete
Inputs
Reading of multiple input bits, reading back of multiple output bits
R: Process image
FC3 0x03
FC4 0x04
Read Holding
Registers
Read Input
Registers
Reading of multiple input registers, reading back of multiple output registers
R: Process image, internal variables
FC5 0x05
FC6 0x06
FC11 0x0B
Write Single Coil Writing of a single output bit
Write Single
Register
Get Comm Event
Counters
Writing of a single output register
Communication event counter
W:
W:
Process image
Process image, internal variables
R: None
FC15 0x0F
FC16
FC23
0x10
0x17
Write Multiple
Coils
Write Multiple
Registers
Read/Write
Multiple
Registers
Writing of multiple output bits W: Process image
Writing of multiple output registers
Reading of multiple input registers, reading and writing of multiple output registers
W:
R/W:
Process image, internal variables
Process image, internal variables
To execute a desired function, specify the respective function code and the address of the selected input or output data.
Note the number system when addressing!
The examples listed use the hexadecimal system (i.e.: 0x000) as their numerical format. Addressing begins with 0. The format and beginning of the addressing may vary according to the software and the control system. All addresses then need to be converted accordingly.
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92 Fieldbus Communication WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
10.1.2 Using the MODBUS Functions
The graphic overview illustrates the access of a few MODBUS functions to process image data using an example of a fieldbus node.
Note
Figure 44: Using MODBUS Functions for a Fieldbus Coupler/Controller
Use of bit functions should be given priority for binary signals!
It is meaningful to access binary signals using bit functions . If reading or writing access to binary signals is performed via register functions , an address shift may occur when other analog input/output modules are operated at the fieldbus coupler/controller.
Note!
Only the 512 binary input and output signals with the lowest values may be addressed using bit functions . Only register functions may be used to access digital inputs/outputs beyond this.
Manual
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
10.1.3 Description of the MODBUS Functions
Fieldbus Communication 93
All MODBUS functions are executed as follows:
1. A MODBUS TCP master (e.g., a PC) makes a request to the WAGO fieldbus node using a specific function code based on the desired operation..
2. The WAGO fieldbus node receives the datagram and then responds to the master with the proper data, which is based on the master’s request.
If the WAGO fieldbus node receives an incorrect request, it sends an error datagram (Exception) to the master.
The exception code contained in the exception has the following meaning:
Table 45: Exception Codes
Exception code Meaning
0x01 Illegal function
0x02
0x03
0x04
Illegal data address
Illegal data value
Slave device failure
0x05
0x06
0x08
0x0A
0x0B
Acknowledge
Server busy
Memory parity error
Gateway path unavailable
Gateway target device failed to respond
The telegram structure for Request, Response and Exception is explained for each function code using examples in the sections that follow.
Manual
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94 Fieldbus Communication WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
10.1.3.1 Function Code FC1 (Read Coils) and FC2 (Read Discrete Inputs)
These functions read out multiple input bits (e.g., digital inputs) and/or output bits
(e.g., digital outputs) and are to be used identically.
Based on the tables for MODBUS register mapping, these bit functions can be used to address only the 512 lowest value input or output bits for the process image. As the maximum number of I/O modules (64) enables a node to be set up with up to 1024 digital signals, it may be necessary to also address digital inputs/
-outputs beyond this. Register functions FC3 and FC4 must be used for this.
Structure of the request
The request determines the start address and the number of bits to be read.
Example: A request of which bit 0 to bit 7 is to be read.
Table 46: Request Structure for Function Codes FC1 and FC2
Byte
Byte 0, 1
Byte 2, 3
Byte 4, 5
Byte 6
Byte 7
Byte 8, 9
Byte 10, 11
Field name
Transaction identifier
Protocol identifier
Length field
Unit identifier
Example
0x0000
0x0000
0x0006
0x01 not used
MODBUS function code 0x01 or 0x02
Starting address 0x0000
Bit count 0x0008
Structure of the response
The current values of the queried bits are entered into the data field. Value 1 =
ON, value 0 = OFF. The least significant bit of the first data byte contains the first bit of the request. The other bits follow in ascending order. If the number of inputs is not a multiple of 8, the remaining bits of the last data byte are filled with zeros.
Table 47: Response Structure for Function Codes FC1 and FC2
Byte
...
Byte 7
Field name
MODBUS function code
Example
0x01 or 0x02
Byte 8
Byte 9
Byte count
Bit values
0x01
0x12
The status of inputs 7 to 0 is indicated as byte value 0x12 or binary 0001 0010.
Input 7 is the bit with the highest value, input 0 with the lowest value for this byte.
Assignment is made from 7 to 0 as follows:
Manual
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Fieldbus Communication 95
Table 48: Input Assignments
OFF OFF OFF ON OFF OFF ON OFF
Bit 0 0 0 1 0 0 1 0
Coil 7 6 5 4 3 2 1 0
Structure of the exception
Table 49: Exception Structure for Function Codes FC1 and FC2
Byte
...
Byte 7
Field name
Byte 8
Example
MODBUS function code 0x81 (for FC1) or 0x82
(for FC2)
Exception code 0x02
10.1.3.2 Function Code FC3 (Read Holding Registers) and FC4 (Read Input
Registers)
These functions read out multiple input words (input registers) and/or output words (output registers) and are to be used indentically.
Structure of the request
The request determines the address of the start word (start register) and the number of registers to be read.
Example: request to read registers 0 and 1.
Table 50: Request Structure for Function Codes FC3 and FC4
Byte
Byte 0, 1
Byte 2, 3
Byte 4, 5
Byte 6
Byte 7
Byte 8, 9
Byte 10, 11
Field name
Transaction identifier
Protocol identifier
Length field
Unit identifier
Example
0x0000
0x0000
0x0006
0x01 not used
MODBUS function code 0x03 or 0x04
Starting address 0x0000
Word count 0x0002
Manual
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96 Fieldbus Communication
Structure of the response
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
The register data of the response is entered into the registers (2 bytes per register).
The first byte contains the more significant bits, the second byte contains the less significant bits.
Table 51: Response Structure for Function Codes FC3 and FC4
Byte
...
Byte 7
Byte 8
Byte 9, 10
Byte 11, 12
Field name
MODBUS function code
Byte count
Value register 0
Value register 1
Example
0x03 or 0x04
0x04
0x1234
0x2345
The response shows that register 0 contains the value 0x1234 and register 1 contains the value 0x2345.
Structure of the exception
Table 52: Exception Structure for Function Codes FC3 and FC4
Byte
...
Byte 7
Byte 8
Field name
Exception code
Example
MODBUS function code 0x83 (for FC3) or 0x84
0x02
10.1.3.3 Function Code FC5 (Write Single Coil)
This function writes a digital output bit. Value 0xFF00 sets the output to TRUE, value 0x0000 to FALSE.
Structure of the request
The request determines the address of the output bit.
Example: Setting the second output bit (address 1).
Table 53: Request Structure for Function Code FC5
Byte
Byte 0, 1
Byte 2, 3
Byte 4, 5
Byte 6
Byte 7
Field name
Transaction identifier
Protocol identifier
Length field
Example
0x0000
0x0000
0x0006
Unit identifier 0x01 not used
MODBUS function code 0x05
Byte 8, 9
Byte 10
Byte 11
Output address
ON/OFF
0x0001
0xFF
0x00
Manual
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Structure of the response
Fieldbus Communication 97
Table 54: Response Structure for Function Code FC5
Byte
...
Byte 7
Field name Example
MODBUS function code 0x05
Byte 8, 9
Byte 10
Byte 11
Output address
Value
0x0001
0xFF
0x00
Structure of the exception
Table 55: Exception Structure for Function Code FC5
Byte
...
Byte 7
Byte 8
Field name Example
MODBUS function code 0x85
Exception code 0x02 or 0x03
10.1.3.4 Function Code FC6 (Write Single Register)
This function writes a value into a single output register.
Structure of the request
The request determines the address of the first output word to be set. The value to be set is determined in the request data field.
Example: Setting of the second output channel to 0x1234.
Table 56: Request Structure for Function Code FC6
Byte
Byte 0, 1
Byte 2, 3
Byte 4, 5
Byte 6
Byte 7
Byte 8, 9
Byte 10, 11
Field name
Transaction identifier
Protocol identifier
Example
0x0000
0x0000
Length field
Unit identifier
0x0006
0x01 not used
MODBUS function code 0x06
Register address 0x0001
Register value 0x1234
Manual
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Structure of the response
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
The response is an echo of the request.
Table 57: Response Structure for Function Code FC6
Byte
...
Byte 7
Field name
MODBUS function code
Example
0x06
Byte 8, 9
Byte 10, 11
Register address
Register value
0x0001
0x1234
Structure of the exception
Table 58: Exception Structure for Function Code FC6
Byte
...
Byte 7
Byte 8
Field name Example
MODBUS function code 0x86
Exception code 0x02
10.1.3.5 Function Code FC11 (Get Comm Event Counter)
This function returns a status word and a single event counter from the communication register of the fieldbus coupler/controller. The higher level control system can use this counter to determine whether the fieldbus coupler/controller has processed the messages properly.
Every time a message is processed successfully, the counter counts up.
Error messages or counter queries are not counted.
Structure of the request
Table 59: Request Structure for Function Code FC11
Byte
Byte 0, 1
Byte 2, 3
Byte 4, 5
Byte 6
Byte 7
Field name
Transaction identifier
Protocol identifier
Example
0x0000
0x0000
Length field
Unit identifier
0x0002
0x01 not used
MODBUS function code 0x0B
Manual
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Structure of the response
Fieldbus Communication 99
The response contains a 2-byte status word and a 2-byte event counter.
The status word consists of zeros.
Table 60: Response Structure for Function Code FC11
Byte
...
Byte 7
Byte 8, 9
Byte 10, 11
Field name Example
MODBUS function code 0x0B
Status 0x0000
Event count 0x0003
The event counter shows that 3 (0x0003) events were counted.
Structure of the exception
Table 61: Exception Structure for Function Code FC11
Byte
...
Byte 7
Byte 8
Field name Example
MODBUS function code 0x8B
Exception code 0x02
10.1.3.6 Function Code FC15 (Write Multiple Coils)
This function is used to set multiple output bits to 1 or 0.
Structure of the request
The request determines the start address and the number of bits to be set. The required state (1 or 0) of the bit is determined by the content of the request data field.
In this example, 16 bits are set, starting with address 0. The request contains 2 bytes with the value 0xA5F0, i.e. 1010 0101 1111 0000 binary.
The first byte assigns the 0xA5 value to address 7 to 0, with 0 being the least significant bit. The next byte assigns 0xF0 to address 15 to 8, with 8 being the least significant bit.
Manual
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100 Fieldbus Communication WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 62: Request Structure for Function Code FC15
Byte
Byte 0, 1
Byte 2, 3
Byte 4, 5
Byte 6
Byte 7
Field name
Transaction identifier
Protocol identifier
Length field
Example
0x0000
0x0000
0x0009
Unit identifier 0x01 not used
MODBUS function code 0x0F
Byte 8, 9
Byte 10, 11
Byte 12
Byte 13
Byte 14
Starting address
Bit count
Byte count
Data byte1
Data byte2
0x0000
0x0010
0x02
0xA5
0xF0
Structure of the response
Table 63: Response Structure for Function Code FC15
Byte
...
Byte 7
Field name Example
MODBUS function code 0x0F
Byte 8, 9
Byte 10, 11
Starting address
Bit count
0x0000
0x0010
Structure of the exception
Table 64: Exception Structure for Function code FC15
Byte
...
Byte 7
Byte 8
Field name
Exception code
Example
MODBUS function code 0x8F
0x02
Manual
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Fieldbus Communication 101
10.1.3.7 Function Code FC16 (Write Multiple Registers)
This function writes values to a number of output registers.
Structure of the request
The request determines the start address and the number of registers to be set.
Two bytes of data per register are transmitted.
Example: The data in the registers 0 and 1 is set.
Table 65: Request Structure for Function Code FC16
Byte
Byte 0, 1
Byte 2, 3
Byte 4, 5
Byte 6
Byte 7
Byte 8, 9
Field name
Transaction identifier
Protocol identifier
Length field
Example
0x0000
0x0000
0x000B
Unit identifier 0x01 not used
MODBUS function code 0x10
Starting address 0x0000
Byte 10, 11
Byte 12
Byte 13, 14
Byte 15, 16
Word count
Byte count
Register value 1
Register value 2
0x0002
0x04
0x1234
0x2345
Structure of the response
Table 66: Response Structure for Function Code FC16
Byte
...
Byte 7
Byte 8, 9
Byte 10, 11
Field name
MODBUS function code
Starting address
Word count
Example
0x10
0x0000
0x0002
Structure of the exception
Table 67: Exception Structure for Function Code FC16
Byte
...
Byte 7
Byte 8
Field name
Exception code
Example
MODBUS function code 0x90
0x02
Manual
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750-316/300-000 Fieldbus Coupler MODBUS RTU
10.1.3.8 Function Code FC23 (Read/Write Multiple Registers)
This function writes values to multiple output registers and reads values from multiple input and/or output registers. Write access is executed before read access.
Structure of the request
The request message determines the start address and the number of registers to be set. Two bytes of data per register are transmitted.
Example: The data in the register 3 is set to 0x0123.
Example: The values 0x0004 and 0x5678 are read from registers 0 and 1.
Table 68: Request Structure for Function Code FC23
Byte
Byte 0, 1
Byte 2, 3
Byte 4, 5
Byte 6
Byte 7
Byte 8, 9
Byte 10, 11
Byte 12, 13
Byte 14, 15
Field name
Transaction identifier
Protocol identifier
Length field
Unit identifier
MODBUS function code
Starting address for read
Word count for read
Starting address for write
Word count for write
Example
0x0000
0x0000
0x000F
0x01 not used
0x17
0x0000
0x0002
0x0003
0x0001
Byte 16 Byte count (2 x word count for write) 0x02
Byte 17...(B+16) Register values (B = Byte count) 0x0123
Structure of the response
Table 69: Response Structure for Function Code FC23
Byte
...
Field name
Byte 7
Byte 8
MODBUS function code
Byte count (2 x word count for read)
Byte 9...(B+1) Register values (B = Byte count)
Structure of the exception
Table 70: Exception Structure for Function Code FC23
Byte
...
Field name
Byte 7
Byte 8
MODBUS function code
Exception code
Example
0x17
0x04
0x0004 or 0x5678
Example
0x97
0x02
Manual
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Fieldbus Communication 103
10.1.4 MODBUS Register Mapping
The following tables display the MODBUS addressing and the internal variables.
10.1.4.1 Register Access
Register services are used to determine or change the statuses of complex and digital intput/output modules.
Read register access (with FC3, FC4 and FC23)
Table 71: Read register Access (with FC3, FC4 and FC23)
MODBUS Address
[dec] [hex]
IEC-61131-
Address
Memory area
0...255 0x0000...0x00FF %IW0...%IW255 Physical Input Area
256...511 0x0100...0x01FF - MODBUS Exception: "Illegal data address"
512...767 0x0200...0x02FF %QW0...%QW255 Physical Output Area
768...4095 0x0300...0x0FFF - MODBUS Exception: "Illegal data address"
4096...12287 0x1000...0x2FFF -
12288...65535 0x3000...0xFFFF -
Configuration register (see Section
"Configuration Register")
MODBUS Exception: "Illegal data address"
Write register access (with FC6, FC16 and FC23)
Table 72: Write Register Access (with FC6, FC16 and FC23)
MODBUS Address
[dec] [hex]
IEC-61131-
Address
Memory area
0...255 0x0000...0x00FF %QW0...%QW255 Physical Output Area
256...511 0x0100...0x01FF - MODBUS Exception: "Illegal data address"
512...767 0x0200...0x02FF %QW0...%QW255 Physical Output Area
768...4095 0x0300...0x0FFF - MODBUS Exception: "Illegal data address"
4096...12287 0x1000...0x2FFF -
12288...65535 0x3000...0xFFFF -
Configuration register (see Section
"Configuration Register")
MODBUS Exception: "Illegal data address"
Manual
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104 Fieldbus Communication
10.1.4.2 Bit Access
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Digital MODBUS services are bit access processes used to determine or change the statuses of digital input/output modules. These services do not reach complex
I/O modules; they are simply disregarded.
Read bit access (with FC1 and FC2)
Table 73: Read bit access (with FC1 and FC2)
MODBUS Address IEC-61131
Address
[dec]
0...511
[hex]
0x0000...0x01FF Depending on the node configuration
512...1023 0x0200...0x03FF Depending on the node configuration
1024... 65535 0x0400...0xFFFF -
Description
First 512 digital inputs
First 512 digital outputs
MODBUS Exception: "Illegal data address"
Bit Access Writing (with FC5 and FC15)
Table 74: Bit access writing (with FC5 and FC15)
MODBUS address
[dec] [hex]
Memory range Description
0...511 0x0000...0x01FF Physical intput area First 512 digital outputs
512...1023 0x0200...0x03FF Physical output area First 512 digital outputs
1024...65535 0x0400...0xFFFF - MODBUS exception: “Illegal data address”
Manual
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Fieldbus Communication 105
10.1.5 MODBUS Registers
0x1051 R
0x2000 R
0x2001 R
0x2002 R
0x2003 R
0x2004 R
0x2005 R
0x2006 R
0x2007 R
0x2008 R
0x2010 R
0x2011 R
0x2012 R
0x2013 R
0x2014 R
0x2020 R
0x2021 R
0x2022 R
Table 75: MODBUS Registers
Register address
Access Length
(word)
0x1000 R/W 1
0x1001 R/W 1
0x1002 R/W 1
0x1003 R/W 1
Description
Watchdog time read/write
Watchdog coding mask 1…16
Watchdog coding mask 17…32
Watchdog trigger
0x1004 R 1
0x1005 R/W 1
Minimum trigger time
Watchdog stop (Write sequence 0xAAAA, 0x5555)
0x1006 R 1
0x1007 R/W 1
0x1008 R/W 1
0x1020 R 1…2
0x1021 R
0x1022 R
0x1023 R
0x1024 R
1
0x1025 R
0x1026 R
0x1027 R/W 1
0x1028 R 9
1…4
1…3
1…2
1…4
Watchdog status
Restart watchdog (Write sequence 0x1)
Stop watchdog (Write sequence 0x55AA or 0xAA55)
LED error code
LED error argument
Number of analog output data in the process image (in bits)
Number of analog input data in the process image (in bits)
Number of digital output data in the process image (in bits)
Number of digital input data in the process image (in bits)
Current node address
Modbus configuration
Configuration of the communication interface
0x1040 R/W Process data communication channel
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
32
16
16
Diagnosis of the connected I/O modules
Constant 0x0000
Constant 0xFFFF
Constant 0x1234
Constant 0xAAAA
Constant 0x5555
Constant 0x7FFF
Constant 0x8000
Constant 0x3FFF
Constant 0x4000
Firmware version
Series code
Fieldbus coupler/controller code
Firmware version major revision
Firmware version minor revision
Short description controller
Compile time of the firmware
Compile date of the firmware
10.1.5.1 Accessing Register Values
You can use any MODBUS application to access (read from or write to) register values. Both commercial (e.g., "Modscan") and free programs (from http://www.modbus.org/tech.php
) are available.
The following sections describe how to access both the registers and their values.
Manual
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106 Fieldbus Communication
10.1.5.2 Watchdog Registers
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
The watchdog monitors the data transfer between the fieldbus master and the controller. Every time the controller receives a specific request (as define in the watchdog setup registers) from the master, the watchdog timer in the controller resets.
In the case of fault free communication, the watchdog timer does not reach its end value. After each successful data transfer, the timer is reset.
If the watchdog times out, a fieldbus failure has occurred. In this case, the fieldbus controller answers all following MODBUS TCP/IP requests with the exception code 0x0004 (Slave Device Failure).
In the controller special registers are used to setup the watchdog by the master
(Register addresses 0x1000 to 0x1008).
By default, the watchdog is not enabled when you turn the controller on. To activate it, the first step is to set/verify the desired time-out value of the Watchdog
Time register (0x1000). Second, the function code mask must be specified in the mask register (0x1001), which defines the function code(s) that will reset the timer for the first time. Finally, the Watchdog-Trigger register (0x1003) or the register 0x1007 must be changed to a non-zero value to start the timer subsequently.
Reading the Minimum Trigger time (Register 0x1004) reveals whether a watchdog fault occurred. If this time value is 0, a fieldbus failure is assumed. The timer of watchdog can manually be reset, if it is not timed out, by writing a value of 0x1 to the register 0x1003 or to the Restart Watchdog register 0x1007.
After the watchdog is started, it can be stopped by the user via the Watchdog Stop register (0x1005) or the Simply Stop Watchdog register (0x1008).
The watchdog registers can be addressed in the same way as described with the
MODBUS read and write function codes. Specify the respective register address in place of the reference number.
Table 76: Register Address 0x1000
Register address 0x1000 (4096 dec
)
Value Watchdog time, WS_TIME
Access
Default
Description
Read/write
0x0000
This register stores the watchdog timeout value. However, a non zero value must be stored in this register before the watchdog can be triggered. The time value is stored in multiples of 100ms (e.g., 0x0009 is .9 seconds). It is not possible to modify this value while the watchdog is running.
There is no code, by which the current data value can be written again, while the watchdog is active.
Manual
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Fieldbus Communication 107
Table 77: Register Value 0x1001
Register address 0x1001 (4097 dez
)
Value Watchdog function coding screen, function code 1...16, WDFCM_1_16
Access
Default
Description
Read/write
0xFFFF
Use this screen to set the function codes to trigger the watchdog function. With a
“1” on the bit position described below, the function code can be selected:
FC 1 Bit 0
FC 2 Bit 1
FC 3 Bit 2
FC 4 Bit 3
FC 5 Bit 4
...
FC 16 Bit 15
The registry value can only be modified if the watchdog is not active. The bit pattern saved in the registry specifies, which function codes trigger the watchdog.
Some function codes are not supported. Values can be entered for these, but the watchdog does not start even if another MODBUS device sends it.
Table 78: Register Value 0x1002
Register address 0x1002 (4098 dez
)
Value Watchdog function coding screen, function code 17...32, WD_FCM_17_32
Access
Default
Description
Read/write
0xFFFF
The same function as before, but with function codes 17 to 32.
FC 17 Bit 0
FC 18 Bit 1
...
FC 32 Bit 15
These codes are not supported. Therefore, this register should be left at the default value. The registry value can only be modified if the watchdog is not active. There is no exception code by which the current data value can be written again while the watchdog is active.
Table 79: Register Value 0x1003
Register address 0x1003 (4099 dez
)
Value Watchdog trigger, WD_TRIGGER
Access
Default
Description
Read/write
0x0000
This register is used for an alternative trigger method. The watchdog is triggered by writing different values to this register. Successive values must differ in size.
The watchdog starts when values not equal to zero are written after a PowerOn.
The written value may not be equal to the previously written value for a restart!
A watchdog error is reset and it is again possible to write process data.
Manual
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108 Fieldbus Communication WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 80: Register Value 0x1004
Register address 0x1004 (4100 dez
)
Value Minimum current trigger time, WD_AC_TRG_TIME
Access
Default
Description
Read
0xFFFF
This register saves the current smallest watchdog trigger time. When the watchdog is triggered, the saved value is compared to the current value. If the current value is smaller than the saved value, it is replaced by the current value.
The unit is 100 ms/digit. The saved value is modified by writing new values. This has no effect on the watchdog. The value 0x000 is not permitted.
Table 81: Register Value 0x1005
Register address 0x1005 (4101 dez
)
Value Stop watchdog, WD_AC_STOP_MASK
Access Read/write
Default 0x0000
Description If the value 0xAAAA followed by the value 0x5555 is written to this register, the watchdog stops. The watchdog error response is blocked. A watchdog error is reset and it is again possible to write to the process data.
Table 82: Register Value 0x1006
Register address 0x1006 (4102 dez
)
Value While watchdog is running, WD_RUNNING
Access
Default
Description
Read
0x0000
Current watchdog status at 0x0000: Watchdog inactive at 0x0001: Watchdog active at 0x0002: Watchdog timed out
Table 83: Register Value 0x1007
Register address 0x1007 (4103 dez
)
Value Restart watchdog, WD_RESTART
Access
Default
Description
Read/write
0x0001
Writing 0x1 to the register starts the watchdog again.
If the watchdog was stopped before the overflow, it is not started again.
Table 84: Register Value 0x1008
Register address 0x1008 (4104 dez
)
Value Just pause watchdog, WD_AC_STOP_SIMPLE
Access
Default
Description
Read/write
0x0000
By writing the values 0x0AA55 or 0x55AA, the watchdog is paused if active.
The watchdog error response is temporarily disabled. An existing watchdog error is reset and it is again possible to write to the watchdog register.
The length of each register is 1 word; i.e., with each access only one word can be written or read. Following are two examples of how to set the value for a time overrun:
Manual
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Fieldbus Communication 109
Setting the watchdog for a timeout of more than 1 second:
1. Write 0x000A in the register for time overrun (0x1000).
Register 0x1000 works with a multiple of 100 ms;
1 s = 1000 ms; 1000 ms / 100 ms = 10 dec
= A hex
)
2. Use the function code 5 to write 0x0010 (=2
(5-1)
) in the coding mask
(register 0x1001).
Table 85: Starting Watchdog
FC FC16 FC15 FC14 FC13 FC12 FC11 FC10 FC9 FC8 FC7 FC6 FC5 FC4 FC3 FC2 FC1
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 bin 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 hex 0 0 1 0
Function code 5 (writing a digital output bit) continuously triggers the watchdog to restart the watchdog timer again and again within the specified time. If time between requests exceeds 1 second, a watchdog timeout error occurs.
3. To stop the watchdog, write the value 0xAA55 or 0x55AA into 0x1008
(Simply Stop Watchdog register, WD_AC_STOP_SIMPLE).
Setting the watchdog for a timeout of 10 minutes or more:
1. Write 0x1770 (= 10*60*1000 ms / 100 ms) in the register for time overrun
(0x1000).
(Register 0x1000 works with a multiple of 100 ms;
10 min = 600,000 ms; 600,000 ms / 100 ms = 6000dec = 1770hex)
2. Write 0x0001 in the watchdog trigger register (0x1003) to start the watchdog.
3. Write different values (e.g., counter values 0x0000, 0x0001) in the watchdog to trigger register (0x1003).
Values following each other must differ in size. Writing of a value not equal to zero starts the watchdog. Watchdog faults are reset and writing process data is possible again.
4. To stop the watchdog, write the value 0xAA55 or 0x55AA into 0x1008
(Simply Stop Watchdog register, WD_AC_STOP_SIMPLE).
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110 Fieldbus Communication WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
10.1.5.3 Diagnostic Registers
The following registers can be read to determine errors in the node:
Table 86: Register Address 0x1020
Register address 0x1020 (4128 dec
)
Value LedErrCode
Access
Description
Read
Declaration of the error code
Table 87: Register Address 0x1021
Register address 0x1021 (4129 dec
)
Value LedErrArg
Access
Description
Read
Declaration of the error argument
10.1.5.4 Configuration Registers
The following registers contain configuration information of the connected modules:
Table 88: Register Address 0x1022
Register address 0x1022 (4130 dec
)
Value CnfLen.AnalogOut
Access
Description
Read
Number of word-based outputs registers in the process image in bits (divide by
16 to get the total number of analog words)
Table 89: Register Address 0x1023
Register address 0x1023 (4131 dec
)
Value CnfLen.AnalogInp
Access Read
Description Number of word-based inputs registers in the process image in bits (divide by 16 to get the total number of analog words)
Table 90: Register Address 0x1024
Register address 0x1024 (4132 dec
)
Value CnfLen.DigitalOut
Access
Description
Read
Number of digital output bits in the process image
Table 91: Register Address 0x1025
Register address 0x1025 (4133 dec
)
Value CnfLen.DigitalInp
Access
Description
Read
Number of digital input bits in the process image
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Fieldbus Communication 111
Table 92: Register Value 0x1026
Register address 0x1026 (4134 dez
)
Value Current node address
Access
Description
Read
The address is read when power supply is switched on.
Table 93: Register Value 0x1027
Register address 0x1027 (4135 dez
)
Value MODBUS configuration
Access Read
Description D0 – D3:
D4 – D5:
D6:
D7 – D9:
D10:
D11:
D12:
D13:
Baud rate
Byte Frame
Data Length 8/7 Bits
End of Frame Time
RTU/ASCII Mode
Error Check
Watchdog fbconfig.lib
Table 94: Register Value 0x1028
Register address 0x1028 (4136 dez
)
Value Configuration of the communication interface
Access Read/write
Description The low byte corresponds to the required station address.
The high byte is the binary component for the required station address.
High-byte
0x00
*)
Low-byte
0x00
Station address
Determined by rotary encoder switch
0xFF 0x00 0
0xFE 0x01 1
0xFD
…
0x02
0x01
0x00
*)
Default setting
0x02
…
0xFD
0xFE
0xFF
2
…
253
254 illegal
Table 95: Register Address 0x1040
Register address 0x1040 (4160 dec
)
Value Process data communication channel
Access
Description
Read/write
This register has the function of an interface to WAGO-I/OPRO CAA, e.g. for the debugging
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112 Fieldbus Communication WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 96: Register Address 0x1051
Register address 0x1051 (4177 dec
)
Value Diagnosis of the connected I/O modules at the MODBUS/RTU fieldbus
Access
Description
Read
Diagnosis of the connected I/O modules, length 3 words
Word 1: Number of the module
Word 2: Number of the channel
Word 3: Diagnosis
10.1.5.5 Firmware Information Registers
The following registers contain information on the firmware of the fieldbus coupler/controller:
Table 97: Register Address 0x2010
Register address 0x2010 (8208 dec
) with a word count of 1
Value Revision, INFO_REVISION
Access
Description
Read
Firmware index, e.g. 0005 for version 5
Table 98: Register Address 0x2011
Register address 0x2011 (8209 dec
) with a word count of 1
Value Series code, INFO_SERIES
Access
Description
Read
WAGO serial number, e.g. 0750 for WAGO-I/O-SYSTEM 750
Table 99: Register Address 0x2012
Register address 0x2012 (8210 dec
) with a word count of 1
Value Order number, INFO_ITEM
Access
Description
Read
First part of WAGO order number, e.g. 841 for the controller 750-841 or 341 for the coupler 750-341 etc.
Table 100: Register Address 0x2013
Register address 0x2013 (8211 dec
) with a word count of 1
Value Major sub item code, INFO_MAJOR
Access Read
Description Firmware version Major Revision
Table 101: Register Address 0x2014
Register address 0x2014 (8212 dec
) with a word count of 1
Value Minor sub item code, INFO_MINOR
Access
Description
Read
Firmware version Minor Revision
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Fieldbus Communication 113
Table 102: Register Address 0x2020
Register address 0x2020 (8224 dec
) with a word count of up to 16
Value Description, INFO_DESCRIPTION
Access
Description
Read
Information on the controller, 16 words
Table 103: Register Address 0x2021
Register address 0x2021 (8225 dec
) with a word count of up to 8
Value Description, INFO_DESCRIPTION
Access
Description
Read
Time of the firmware version, 8 words
Table 104: Register Address 0x2022
Register address 0x2022 (8226 dec
) with a word count of up to 8
Value Description, INFO_DATE
Access Read
Description Date of the firmware version, 8 words
10.1.5.6 Constant Registers
The following registers contain constants, which can be used to test communication with the master:
Table 105: Register Address 0x2000
Register address 0x2000 (8192 dec
)
Value Zero, GP_ZERO
Access
Description
Read
Constant with zeros
Table 106: Register Address 0x2001
Register address 0x2001 (8193 dec
)
Value Ones, GP_ONES
Access Read
Description Constant with ones
• –1 if this is declared as "signed int"
• MAXVALUE if it is declared as "unsigned int"
Table 107: Register Address 0x2002
Register address 0x2002 (8194 dec
)
Value 1,2,3,4, GP_1234
Access Read
Description This constant value is used to test the Intel/Motorola format specifier. If the master reads a value of 0x1234, then with Intel format is selected – this is the correct format. If 0x3412 appears, Motorola format is selected.
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114 Fieldbus Communication WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 108: Register Address 0x2003
Register address 0x2003 (8195 dec
)
Value Mask 1, GP_AAAA
Access
Description
Read
This constant is used to verify that all bits are accessible to the fieldbus master.
This will be used together with register 0x2004.
Table 109: Register Address 0x2004
Register address 0x2004 (8196 dec
)
Value Mask 1, GP_5555
Access
Description
Read
This constant is used to verify that all bits are accessible to the fieldbus master.
This will be used together with register 0x2003.
Table 110: Register Address 0x2005
Register address 0x2005 (8197 dec
)
Value Maximum positive number, GP_MAX_POS
Access
Description
Read
Constant in order to control arithmetic.
Table 111: Register Address 0x2006
Register address 0x2006 (8198 dec
)
Value Maximum negative number, GP_MAX_NEG
Access
Description
Read
Constant in order to control arithmetic
Table 112: Register Address 0x2007
Register address 0x2007 (8199 dec
)
Value Maximum half positive number, GP_HALF_POS
Access Read
Description Constant in order to control arithmetic
Table 113: Register Address 0x2008
Register address 0x2008 (8200 dec
)
Value Maximum half negative number, GP_HALF_NEG
Access
Description
Read
Constant in order to control arithmetic
Manual
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750-316/300-000 Fieldbus Coupler MODBUS RTU
I/O Modules 115
11 I/O Modules
11.1 Overview
For modular applications with the WAGO-I/O-SYSTEM 750/753, different types of I/O modules are available
• Digital Input Modules
• Digital Output Modules
• Analog Input Modules
• Analog Output Modules
• Specialty Modules
• System Modules
For detailed information on the I/O modules and the module variations, refer to the manuals for the I/O modules.
You will find these manuals on the WAGO web pages under www.wago.com
.
More Information about the WAGO-I/O-SYSTEM
Current information on the modular WAGO-I/O-SYSTEM is available in the
Internet under: www.wago.com
.
Manual
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116 I/O Modules WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
11.2 Structure of Process Data for MODBUS RTU
The process image uses a byte structure (without word alignment) for the
MODBUS RTU fieldbus coupler/controller. The internal mapping method for data greater than one byte conforms to Intel formats.
The following section describes the representation for WAGO-I/O SYSTEM 750 and 753 Series I/O modules in the process image of the MODBUS RTU fieldbus coupler/controller, as well as the configuration of the process values.
Equipment damage due to incorrect address!
To prevent any damage to the device in the field, you must always take the process data for all previous byte or bit-oriented I/O modules into account when addressing an I/O module at any position in the fieldbus node.
11.2.1 Digital Input Modules
Digital input modules output one bit as the process value per signal channel that indicates the status of the respective channel. Bits that represent input process values are entered in the input process image.
Digital input modules with diagnostics have one or more diagnostic bits available in addition to the process data. The diagnostic bits are evaluated by the fieldbus coupler/controller.
If analog input modules are present in the node, the digital input/output module data is grouped in bytes and added to the analog input module data in the input process image.
1-Channel Digital Input Modules with Diagnostics
750-435
Table 114: 1-Channel Digital Input Modules with Status
Input process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Status bit
S 1
Bit 0
Data bit
DI 1
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750-316/300-000 Fieldbus Coupler MODBUS RTU
2-Channel Digital Input Modules
I/O Modules 117
750-400, -401, -405, -406, -410, -411, -412, -425, -427, -438, (and all variants),
753-400, -401, -405, -406, -410, -411, -412, -425, -427
Table 115: 2-Channel Digital Input Modules
Input process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Data bit
DI 2
Channel 2
Bit 0
Data bit
DI 1
Channel 1
2-Channel Digital Input Modules with Diagnostics
750-400, -401, -410, -411, -419, -421, -424, -425
753-400, -401, -410, -411, -421, -424, -425
Table 116: 2-Channel Digital Input Modules with Diagnostics
Input process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Data bit
DI 2
Channel 2
Bit 0
Data bit
DI 1
Channel 1
2-Channel Digital Input Modules with Diagnostics and Output Data
750-418, -419, -421
753-418, -421
In addition to process values in the input process image, the digital input module also provides 4 bits of data in the output process image.
Table 117: 2-channel digital input modules with diagnostics and output data
Input process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Data bit
DI 2
Channel 2
Data bit
DI 1
Channel 1
Output process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2
Acknowledge
Acknowledg ment bit Q 2 ement bit Q
1
Channel 2
Channel 1
Bit 1
0
Bit 0
0
Manual
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118 I/O Modules
4-Channel Digital Input Modules
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
750-402, -403, -408, -409, -414, -415, -422, -423, -428, -432, -433
753-402, -403, -408, -409, -415, -422, -423, -428, -432, -433, -440
Table 118: 4-channel digital input modules
Input process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3
Data bit
DI 4
Channel 4
Bit 2
Data bit
DI 3
Channel 3
Bit 1
Data bit
DI 2
Channel 2
Bit 0
Data bit
DI 1
Channel 1
8-Channel Digital Input Modules
750-430, -431, -436, -437
753-430, -431, -434
Table 119: 8-Channel Digital Input Modules
Input process image
Bit 7 Bit 6
Data bit
DI 8
Channel 8
Data bit
DI 7
Channel 7
Bit 5
Data bit
DI 6
Channel 6
Bit 4
Data bit
DI 5
Channel 5
Bit 3
Data bit
DI 4
Channel 4
Bit 2
Data bit
DI 3
Channel 3
Bit 1
Data bit
DI 2
Channel 2
Bit 0
Data bit
DI 1
Channel 1
16-Channel Digital Input Modules
750-1400, -1402, -1405, -1406, -1407
Table 120: 16-Channel Digital Input Modules
Input process image
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Data bit
Data bit
Data bit
Data bit
Data bit
Data bit
Data bit
Data bit
DI 16 DI 15 DI 14 DI 13 DI 12 DI 11 DI 10 DI 9
Data bit
DI 8
Data bit
DI 7
Data bit
DI 6
Data bit
DI 5
Data bit
DI 4
Data bit
DI 3
Data bit
DI 2
Data bit
DI 1
Chann Chan Chan Chan Chan Chan Chann el 16 nel 15 nel 14 nel 13 nel 12 nel 11 el 10
Chan nel 9
Chan nel 8
Chan nel 7
Chan nel 6
Chan nel 5
Chan nel 4
Chan nel 3
Chan nel 2
Chan nel 1
11.2.2 Digital Output Modules
The digital output modules contain one bit as the process value per channel that indicates the status of the respective channel. These bits are mapped into the output process image.
Digital output modules with diagnostics have one or more diagnostic bits available. The diagnostic bits are evaluated by the fieldbus coupler/controller. In the event of a diagnostic message, the fieldbus coupler enters the state of the diagnostic bit in the diagnostic status word. The entries in the diagnostic status word are made channel-specific.
Manual
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WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
I/O Modules 119
If analog output modules are in the node, the data for the digital input/output modules is always grouped in bytes and added after the analog output data in the output process image.
1-Channel Digital Output Modules with Input Data
750-523
In addition to the process value bit in the output process image, the digital output modules also provides 1 bit that is represented in the input process image. This status image shows “Manual operation”.
Table 121: 1-Channel Digital Output Modules with Input Data
Input process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3
Output process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3
Bit 2
Bit 2
Bit 1 not used
Bit 0
Status bit
"Manual operation"
Bit 1 not used
Bit 0
Controls
DO 1
Channel 1
2-Channel Digital Output Modules
750-501, -502, -509, -512, -513, -514, -517, -535, (and all variants),
753-501, -502, -509, -512, -513, -514, -517
Table 122: 2-Channel Digital Output Modules
Output process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Controls
DO 2
Channel 2
Bit 0
Controls
DO 1
Channel 1
2-Channel Digital Output Modules with Input Data
750-507 (-508), -522,
753-507
Table 123: 2-Channel Digital Output Modules with Input Data
Input process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Diag. bit S2 Diag. bit S1
Channel 2 Channel 1
Manual
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120 I/O Modules
Output process image
Bit 7 Bit 6
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Controls
DO 2
Channel 2
Bit 0
Controls
DO 1
Channel 1
750-506,
753-506
In addition to the 4-bit process values in the output process image, the 750-506 and 753-506 digital input modules provide 4 bits of data in the input process image. A diagnostic bit for each output channel indicates an overload, a short circuit or a wire break via a 2-bit error code.
Table 124: 4-Channel Digital Output Modules 75x-506 with Input Data
Input process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Diag. bit S3 Diag. bit S2 Diag. bit S1 Diag. bit S0
Channel 2 Channel 2 Channel 1 Channel 1
Output process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 not used not used
Bit 1
Controls
DO 2
Channel 2
Bit 0
Controls
DO 1
Channel 1
4-Channel Digital Output Modules
750-504, -516, -519, -531
753-504, -516, -531, -540
Table 125: 4-Channel Digital Output Modules
Output process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3
Controls
DO 4
Channel 4
Bit 2
Controls
DO 3
Channel 3
Bit 1
Controls
DO 2
Channel 2
Bit 0
Controls DO
1
Channel 1
4-Channel Digital Output Modules with Input Data
750-532
In addition to the 4-bit process values in the output process image, the 750-532 digital output modules provide 4 bits of data in the input process image. A diagnostic bit for each output channel indicates an overload, short circuit or wire break.
Manual
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750-316/300-000 Fieldbus Coupler MODBUS RTU
I/O Modules 121
Table 126: 4-Channel Digital Output Modules 750-532 with Input Data
Input process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Diag. bit S3 Diag. bit S2 Diag. bit S1 Diag. bit S0
Channel 4 Channel 3 Channel 2 Channel 1
Diag. bit S = '0' no error
Diag. bit S = '1' wire break, short circuit or overload
Output process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3
Controls
DO 4
Channel 4
Bit 2
Controls
DO 3
Channel 3
Bit 1
Controls
DO 2
Channel 2
Bit 0
Controls
DO 1
Channel 1
8-Channel Digital Output Modules
750-530, -536
753-530, -534
Table 127: 8-Channel Digital Output Modules
Output process image
Bit 7 Bit 6
Controls
DO 8
Channel 8
Controls
DO 7
Channel 7
Bit 5
Controls
DO 6
Channel 6
Bit 4
Controls
DO 5
Channel 5
Bit 3
Controls
DO 4
Channel 4
Bit 2
Controls
DO 3
Channel 3
Bit 1 Bit 0
Controls
DO 2
Channel 2
Controls DO
1
Channel 1
8-Channel Digital Output Modules with Input Data
750-537
In addition to the 8-bit process values in the output process image, the digital output modules provide 8 bits of data in the input process image. A diagnostic bit for each output channel indicates an overload, short circuit or wire break.
Table 128: 4-Channel Digital Output Modules 750-537 with Input Data
Input process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Diag. bit
S7
Channel 8
Diag. bit S6 Diag. bit S5
Channel 7 Channel 6
Diag. bit S4 Diag. bit S3 Diag. bit S2 Diag. bit S1 Diag. bit S0
Channel 5 Channel 4 Channel 3 Channel 2 Channel 1
Diag. bit S = '0' no error
Diag. bit S = '1' wire break, short circuit or overload
Output process image
Bit 7 Bit 6
Controls
DO 8
Channel 8
Controls
DO 7
Channel 7
Bit 5
Controls
DO 6
Channel 6
Bit 4
Controls
DO 5
Channel 5
Bit 3
Controls
DO 4
Channel 4
Bit 2
Controls
DO 3
Channel 3
Bit 1
Controls
DO 2
Channel 2
Bit 0
Controls
DO 1
Channel 1
Manual
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122 I/O Modules WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
16-Channel Digital Output Modules
750-1500, -1501, -1504, -1505
Table 129: 16-Channel Digital Output Modules
Output process image
Bit 15
Bit
14
Bit
13
Bit
12
Bit
11
Bit
10
Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Control s
Control Control Control Control Control Control Control Control Control Control Control Control Control Control Control s s DO s s s s s s s s s s s s s
DO 16 DO 15 14 DO 13 DO 12 DO 11 DO 10 DO 9 DO 8 DO 7 DO 6 DO 5 DO 4 DO 3 DO 2 DO 1
Channel Channe Channe Channe Channe Channe Channel Channe Channe Channe Channe Channe Channe Channe Channe Channe
16 l 15 l 14 l 13 l 12 l 11 10 l 9 l 8 l 7 l 6 l 5 l 4 l 3 l 2 l 1
8-Channel Digital Input/Output Modules
750-1502, -1506
The digital input/output modules provide 8-bit process values in the input and output process image.
Table 130: 8-Channel Digital Input/Output Modules
Input process image
Bit 7
Data bit
DI 8
Channel 8
Bit 6
Data bit
DI 7
Channel 7
Bit 5
Data bit
DI 6
Channel 6
Bit 4
Data bit
DI 5
Channel 5
Bit 3
Data bit
DI 4
Channel 4
Output process image
Bit 7 Bit 6
Controls
DO 8
Channel 8
Controls
DO 7
Channel 7
Bit 5
Controls
DO 6
Channel 6
Bit 4
Controls
DO 5
Channel 5
Bit 3
Controls
DO 4
Channel 4
Bit 2
Data bit
DI 3
Channel 3
Bit 2
Controls
DO 3
Channel 3
Bit 1
Data bit
DI 2
Channel 2
Bit 0
Data bit
DI 1
Channel 1
Bit 1 Bit 0
Controls
DO 2
Channel 2
Controls DO
1
Channel 1
11.2.3 Analog Input Modules
The analog input modules provide 16-bit measured values. In the input process image, 16-bit measured values for each channel are mapped in Intel format byte by byte for the MODBUS RTU fieldbus coupler/controller.
Information on the structure of control and status bytes
For detailed information on the structure of a particular I/O module’s control/status bytes, please refer to that module’s manual. Manuals for each module can be found on the Internet at www.wago.com
.
When digital input modules are also present in the node, the analog input data is always mapped into the Input Process Image in front of the digital data.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
1-Channel Analog Input Modules
750-491 (and all variants)
I/O Modules 123
Table 131: 1-Channel Analog Input Modules
Input Process Image
Sub-
Index
Offset Byte Designation n n+1
0
1
2
3
D0
D1
D2
D3
Remark
Measured value U
D
Measured value U ref
2-Channel Analog Input Modules
750-452, -454, -456, -461, -462, -465, -466, -467, -469, -472, -474, -475, 476, -
477, -478, -479, -480, -481, -483, -485, -492, (and all variants),
753-452, -454, -456, -461, -465, -466, -467, -469, -472, -474, -475, 476, -477,
478, -479, -483, -492, (and all variants)
Table 132: 2-Channel Analog Input Modules
Input Process Image
Sub-
Index
Offset Byte Designation n n+1
0
1
2
3
D0
D1
D2
D3
Remark
Measured value channel 1
Measured value channel 2
4-Channel Analog Input Modules
750-450, -453, -455, -457, -459, -460, -468, (and all variants),
753-453, -455, -457, -459
Table 133: 4-Channel Analog Input Modules
Input Process Image
Sub-
Index
Offset Byte Designation n n+1 n+2 n+3
4
5
6
7
0
1
2
3
D0
D1
D2
D3
D4
D5
D6
D7
Remark
Measured value channel 1
Measured value channel 2
Measured value channel 3
Measured value channel 4
Manual
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124 I/O Modules
8-Channel Analog Input Modules
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
750-451
Table 134: 8-Channel Analog Input Modules
Input Process Image
Sub-
Index
Offset Byte Designation n n+1 n+2 n+3 n+4 n+5 n+6 n+7
11
12
13
14
15
7
8
9
10
4
5
6
0
1
2
3
D7
D8
D9
D10
D11
D12
D13
D14
D15
D0
D1
D2
D3
D4
D5
D6
Remark
Measured value channel 1
Measured value channel 2
Measured value channel 3
Measured value channel 4
Measured value channel 5
Measured value channel 6
Measured value channel 7
Measured value channel 8
11.2.4 Analog Output Modules
The analog output modules provide 16-bit measured values.
In the output process image, 16-bit measured values for each channel are mapped in Intel format byte by byte for the MODBUS RTU fieldbus coupler/controller.
When digital output modules are also present in the node, the analog output data is always mapped into the Output Process Image in front of the digital data.
Information on the structure of control and status bytes
For detailed information on the structure of a particular I/O module’s control/status bytes, please refer to that module’s manual. Manuals for each module can be found on the Internet at www.wago.com
.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
2-Channel Analog Output Modules
750-550, -552, -554, -556, -560, -585, (and all variants),
753-550, -552, -554, -556
Table 135: 2-Channel Analog Output Modules
Output process image
Subindex
Offset Byte designation n n+1
0
1
2
3
D0
D1
D2
D3
4-Channel Analog Output Modules
750-553, -555, -557, -559,
753-553, -555, -557, -559
Table 136: 4-Channel Analog Output Modules
Output process image
Subindex
Offset Byte designation n n+1 n+2 n+3
3
4
5
6
7
0
1
2
D0
D1
D2
D3
D4
D5
D6
D7
I/O Modules 125
Remark
Output value channel 1
Output value channel 2
Remark
Output value channel 1
Output value channel 2
Output value channel 3
Output value channel 4
Manual
Version 1.0.0
126 I/O Modules WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
8-Channel Analog Output Modules
Table 137: 8-Channel Analog Output Modules
Output process image
Subindex
Offset Byte designation n n+1 n+2 n+3 n+4 n+5 n+6 n+7
8
9
10
11
12
4
5
6
7
0
1
2
3
13
14
15
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
Remark
Output value channel 1
Output value channel 2
Output value channel 3
Output value channel 4
Output value channel 5
Output value channel 6
Output value channel 7
Output value channel 8
11.2.5 Specialty Modules
In addition to the data bytes, the control/status byte is also displayed for select I/O modules. This byte is used for the bi-directional data exchange of the I/O module with the higher-level control system.
The control byte is transferred from the control system to the I/O module and the status byte from the I/O module to the control system. As a result, it is possible to set the counter with the control byte or indicate a range overflow/underflow with the status byte.
The control/status byte is always in the low byte in the process image.
Information about the control/status byte structure
Please refer to the corresponding description of the I/O modules for the structure of the control/status bytes. You can find a manual with the relevant I/O module description at: http://www.wago.com
.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Counter Modules
I/O Modules 127
750-: 404 (and all variants except /000-005)
753-: 404 (and version /000-003)
In the input and output process image, counter modules occupy 5 bytes of user data: 4 data bytes and 1 additional control/status byte. The I/O modules then provide 32-bit counter values. Three words are assigned in the process image via word alignment.
Table 138: Counter Modules 750-404, 753-404
Input process image
Sub-
Index
Offset
0 S n
1
2
3
4
5
-
D0
D1
D2
D3
Table 139: Counter Modules 750-404, 753-404
Output process image
Sub-
Index
Offset n
0
1
2
3
4
5
Byte designation
Byte designation
C
-
D0
D1
D2
D3
750-404/000-005
Remark
Status byte not used
Counter value
Remark
Status byte not used
Counter value
In the input and output process images, counter modules occupy a total of 5 bytes of user data: 4 data bytes and 1 additional control/status byte. The I/O modules then provide 16-bit counter values per counter. Three words are assigned in the process image via word alignment.
Table 140: Counter Modules 750-404/000-005
Input process image
Sub-
Index
Offset Byte designation n
0
1
2
3
4
5
S
-
D0
D1
D2
D3
Remark
Status byte not used
Counter value of counter 1
Counter value of counter 2
Manual
Version 1.0.0
128 I/O Modules WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 141: Counter Modules 750-404/000-005
Output process image
Sub-
Index
Offset Byte designation n
0
1
2
3
4
5
C
-
D0
D1
D2
D3
Remark
Control byte not used
Counter setting value counter 1
Counter setting value counter 2
750-638,
753-638
In the input and output process image, counter modules occupy 6 bytes of user data, 4 data bytes and two additional control/status bytes. The I/O modules then provide 16-bit counter values. 6 bytes are occupied in the process image.
Table 142: Counter Modules 750-638, 753-638
Input process image
Subindex
Offset Byte designation n n+1
0
1
2
3
4
5
S0
D0
D1
S1
D2
D3
Table 143: Counter Modules 750-638, 753-638
Output process image
Subindex
Offset Byte designation n n+1
0
1
2
3
4
5
C0
D0
D1
C1
D2
D3
Remark
Status byte of counter 1
Counter value of counter 1
Status byte of counter 2
Counter value of counter 2
Remark
Control byte of counter 1
Counter value of counter 1
Status byte of counter 2
Counter value of counter 2
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
3-Phase Power Measurement Modules
750-493
I/O Modules 129
In the input and output process image, the 3-phase power measurement modules
750-493 occupy a total of 9 bytes of user data; 6 data bytes and 3 additional control/status bytes. 12 bytes are occupied in the process image.
Table 144: 3-Phase Power Measurement Modules 750-493
Input and Output Process Image
Sub-
Index
Offset Byte designation n n+1 n+2
6
7
8
9
10
11
0
1
2
3
4
5
C0/S0
-
D0
D1
C1/S1
-
D2
D3
C2/S2
-
D4
D5
Remark
Control/status byte of channel 1
Empty byte
Counter value of channel 1
Counter value of channel 1
Control/status byte of channel 2
Empty byte
Counter value of channel 2
Counter value of channel 2
Control/status byte of channel 3
Empty byte
Counter value of channel 3
Counter value of channel 3
750-494, -495
In the input and output process image, the 3-phase power measurement modules
750-494 occupy 24 bytes of user data, 16 data bytes and 8 additional control/status bytes. 24 bytes are occupied in the process image.
Table 145: 3-Phase Power Measurement Modules 750-494, -495
Input process image
Sub-
Index n n+1 n+2 n+3 n+4 n+5 n+6 n+7 n+8 n+9 n+10 n+11 n+12 n+13 n+14 n+15
Offset
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Byte designation
S0
S1
S2
S3
S4
S5
S6
S7
D0
D1
D2
D3
D4
D5
D6
D7
Remark
Status word
Expanded status word 1
Expanded status word 2
Expanded status word 3
Process value 1
Process value 2
Manual
Version 1.0.0
130 I/O Modules WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 145: 3-Phase Power Measurement Modules 750-494, -495
Input process image
Sub-
Index n+16 n+17 n+18 n+19 n+20 n+21 n+22 n+23
Offset
16
17
18
19
20
21
22
23
Byte designation
D8
D9
D10
D11
D12
D13
D14
D15
Remark
Process value 3
Process value 4
Table 146: 3-Phase Power Measurement Modules 750-494, -495
Output process image
Offset
17
18
19
20
13
14
15
16
21
22
23
7
8
9
10
3
4
5
6
11
12
0
1
2
Sub-
Index n n+1 n+2 n+13 n+14 n+15 n+16 n+17 n+18 n+19 n+20 n+21 n+22 n+3 n+4 n+5 n+6 n+7 n+8 n+9 n+10 n+11 n+12 n+23
Byte designation
C0
C1
C2
C3
C4
C5
C6
C7
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
Remark
Control word
Expanded control word 1
Expanded control word 2
Expanded control word 3 not used
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Pulse Width Modules
750-511, (and all variants / xxx-xxx)
I/O Modules 131
In the input and output process image, pulse width modules occupy 6 bytes of user data, 4 data bytes and two additional control/status bytes. 6 bytes are occupied in the process image.
Table 147: Pulse Width Modules 750-511 / xxx-xxx
Input and Output Process Image
Sub-
Index
Offset Byte designation n n+1
0
1
2
3
4
5
C0/S0
D0
D1
C1/S1
D2
D3
Remark
Control/status byte of channel 1
Data value of channel 1
Control/status byte of channel 2
Data value of channel 2
Serial Interfaces with an Alternative Data Format
750-650, (and the variants /000-002, -004, -006, -009, -010, -011, -012, -013),
750-651, (and the variants /000-001, -002, -003),
750-653, (and the variants /000-002, -007)
The process image of the / 003-000 variants depends on the parameterized operating mode!
The operating mode of the configurable /003-000 I/O module versions can be set.
The structure of the process image of this I/O module then depends on which operating mode is set.
The I/O modules with serial interface that are set to the alternative data format occupy 4 bytes of user data in the input and output area of the process image, 3 data bytes and one additional control/status byte. 4 bytes are occupied in the process image.
Table 148: Serial Interfaces with Alternative Data Format
Input and Output Process Image
Sub-
Index
Offset Byte designation n n+1
0
1
2
3
C/S
D0
D1
D2
Remark
Control/status byte
Data bytes
Manual
Version 1.0.0
132 I/O Modules WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Serial Interface with Standard Data Format
750-650/000-001, -014, -015, -016
750-653/000-001, -006
The I/O modules with serial interface that are set to the standard data format occupy 6 bytes of user data in the input and output area of the process image, 5 data bytes and one additional control/status byte. 6 bytes are occupied in the process image.
Table 149: Serial Interface with Standard Data Format
Input and Output Process Image
Subindex
Offset Byte designation n
0
1
2
3
4
5
C/S
D0
D1
D2
D3
D4
KNX/EIB/TP1 Module
753-646
Remark
Control/status byte
Data bytes
In the input and output process image, the KNX/TP1 module occupies 24 bytes of user data in router and device mode, 20 data bytes and 1 control/status byte. Even though the additional bytes S1 or C1 are transferred as data bytes, they are used as extended status and control bytes. The opcode is used for the data read/write command and for triggering specific functions of the KNX/EIB/TP1 module.
Access to the process image is not possible in router mode. Telegrams can only be tunneled. In device mode, access to the KNX data can only be performed via special function blocks of the IEC application. Configuration using the ETS engineering tool software is not required for KNX.
Table 150: Input/Output Process Image of the KNX/EIB/TP1-Module
Input/Output Process Image
Offset Byte designation Remark Sub-
Index n n+1 n+2 n+3 n+4
… n+23
4
…
23
0
1
2
3
-
C0/S0
C1/S1
OP
D0
…
D19 not used
Control/status byte
Additional control/status byte
Opcode
Data byte 0
…
Data byte 19
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
RS-232/RS-485 Serial Interface
750-652
I/O Modules 133
Serial Transmission Mode
The data to be sent and received is stored in up to 46 input and output bytes. The data flow is controlled with the control/status byte. The input bytes form the memory area for up to 46 characters, which were received by the interface. The characters to be sent are passed in the output bytes.
Table 151: Input/Output Process Image “Serial Interface”, Serial Transmission Mode
Input/Output Process Image
Byte designation Remark Sub-
Index n
4
… n+8
…
7
8
… n+23 23
0
1
2
3 n+24 24
… … n+47 47
8 bytes
24 bytes
48 bytes
S0/C0
S1/C1
D0
D1
D2
…
D5
D6
…
D21
D22
…
D45
Control/status byte S0
Control/status byte S1
Data byte 0
Data byte 1
Data byte 2
…
Data byte 5
Data byte 6
…
Data byte 21
Data byte 22
…
Data byte 45
Data Exchange Mode
The data to be sent and received is stored in up to 47 input and output bytes. The data flow is controlled with the control/status byte.
Table 152: Input/Output Process Image “Serial Interface”, Data Exchange Mode
Input/Output Process Image
Byte designation Remark Sub-
Index
Offset
0
1 n
2
3 n+8
… n+23 23 n+24 24
…
7
8
…
… … n+47 47
8 bytes
24 bytes
48 bytes
S0/C0
D0
D1
D2
…
D6
D7
…
D22
D23
…
D46
Control/status byte S0
Data byte 0
Data byte 1
Data byte 2
…
Data byte 6
Data byte 7
…
Data byte 22
Data byte 23
…
Data byte 46
Manual
Version 1.0.0
134 I/O Modules
Data Exchange Module
750-654 (and variant /000-001)
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
In the input and output process image, data exchange modules occupy 4 data bytes. 4 bytes are occupied in the process image.
Table 153: Data Exchange Modules
Input and Output Process Image
Subindex
Offset Byte designation n n+1
0
1
2
3
D0
D1
D2
D3
Remark
Data bytes
SSI Transmitter Interface I/O Modules with an Alternative Data Format
750-630 (and all variants)
The process image of the / 003-000 variants depends on the parameterized operating mode!
The operating mode of the configurable /003-000 I/O module versions can be set.
The structure of the process image of this I/O module then depends on which operating mode is set.
In the input process image, SSI transmitter interface modules with status occupy 4 data bytes. Two words are assigned in the process image via word alignment.
Table 154: SSI transmitter interface modules with alternative data format
Input process image
Subindex
Offset Byte designation n n+1
0
1
2
3
D0
D1
D2
D3
Remark
Data bytes
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
I/O Modules 135
SSI Transmitter Interface Modules with Standard Data Format
750-630/000-004, -005, -007
In the input process image, SSI transmitter interface modules with status occupy 5 bytes of user data; 4 data bytes and one additional status byte. A total of 6 bytes are occupied in the process image.
Table 155: SSI Transmitter Interface Modules with Standard Data Format
Input process image
Subindex
Offset Byte designation n
0
1
2
3
4
5
S
-
D0
D1
D2
D3
Remark
Status byte not used
Data bytes
Distance and Angle Measurement
750-631
The I/O module 750-631 occupies 5 bytes in the input process image and 3 bytes in the output process image. 6 bytes are occupied in the process image.
Table 156: Distance and Angle Measurement Modules
Input process image
Subindex
Offset Byte designation n
3
4
5
0
1
2
S
D0
D1
-
D2
D3
Table 157: Distance and Angle Measurement Modules
Output process image
Subindex
Offset Byte designation n
0
1
2
3
4
5
C
D0
D1
-
-
-
Remark
Status byte
Counter word not used
Latch word
Remark
Control byte
Counter word not used
Manual
Version 1.0.0
136 I/O Modules
750-634
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
The I/O module 750-634 occupies 5 bytes in the input process image, or 6 bytes in cycle duration measurement operating mode, and 3 bytes in the output process image. 6 bytes are occupied in the process image.
Table 158: Incremental Encoder Interface 750-634
Input process image
Subindex
Offset Byte designation Remark
0
1
S
D0
Status byte
2
3
Counter word n
D1
D2
*)
(Cycle duration)
4 D3
Latch word
5 D4
*)
If the control byte sets the operating mode to cycle duration measurement, D2 together with
D3/D4 provides a 24-bit value for the cycle duration.
Table 159: Incremental Encoder Interface, 750-634
Output process image
Subindex
Offset Byte designation n
0
1
2
3
4
5
C
D0
D1
-
-
-
Remark
Status byte
Counter word not used
750-637
The incremental encoder interface module occupies 6 bytes of user data in the input and output area of the process image, 4 data bytes and two additional control/status bytes. 6 bytes are occupied in the process image.
Table 160:Inkremental Encoder Interface, 750-637
Input and Output Process Image
Subindex
Offset Byte designation n n+1
0
1
2
3
4
5
C0/S0
D0
D1
C1/S1
D2
D3
Remark
Control/status byte 1
Data values
Control/status byte 2
Data values
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
750-635,
753-635
I/O Modules 137
In the input and output process image, the digital impulse interface module occupies a total of 4 bytes of user data: 3 data bytes and 1 additional control/status byte. 4 bytes are occupied in the process image.
Table 161: Digitale Impulse Interface, 750-635
Input and Output Process Image
Subindex
Offset Byte designation n
0
1
2
3
C0/S0
D0
D1
D2
Remark
Control/status byte
Data values
RTC module
750-640
In both the input and output process image, the RTC module occupies 6 bytes of user data: 4 data bytes and 1 additional control/status byte, as well as 1 command byte (ID) each. 6 bytes are occupied in the process image.
Table 162: RTC Module, 750-640
Input and Output Process Image
Subindex
Offset Byte designation n
0
1
2
3
4
5
C/S
ID
D0
D1
D2
D3
Remark
Control/status byte
Command byte
Data bytes
Manual
Version 1.0.0
138 I/O Modules
Stepper module
750-670, -671, -672, -673
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
The stepper module makes a 12-byte input/output process image available.
The data to be sent and received is stored in up to 7 input/output bytes depending on the operating mode. If the mailbox is activated, the first 6 data bytes are overlaid with mailbox data.
Table 163: Input Process Image, Stepper Module with Mailbox Deactivated
Input/Output Process Image
Subindex
Offset Byte designation n
4
5
6
0
1
2
3
C0/S0
-
D0
D1
D2
D3
D4
7
8
9
10
11
D5
D6
C3/S3
C2/S2
C1/S1
Remark
Control/status byte
Reserved
Data bytes
Control/status byte
Control/status byte
Control/status byte
Table 164: Output Process Image, Stepper Module with Mailbox Activated
Input/Output Process Image
Subindex
Offset Byte designation n
4
5
6
0
1
2
3
C0/S0
-
MBX0
MBX1
MBX2
MBX3
MBX4
7
8
9
10
11
MBX5
-
C3/S3
C2/S2
C1/S1
Remark
Control/status byte
Reserved
Mailbox bytes
(mailbox activated)
Reserved
Control/status byte
Control/status byte
Control/status byte
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
DALI/DSI Master Module
750-641
I/O Modules 139
In the input and output process image, the DALI/DSI master module occupies a total of 6 data bytes: 5 data bytes and 1 additional control/status byte. 6 bytes are occupied in the process image.
Table 165: DALI/DSI Master Module 750-641
Input process image
Subindex
Offset Byte designation
0
1
S
D0 n
2
3
4
5
D1
D2
D3
D4
Remark
Status byte
DALI response
DALI address
Message 3
Message 2
Message 1
Table 166: DALI/DSI Master Module 750-641
Output process image
Subindex
Offset Byte designation
0
1
C
D0 n
2
3
4
5
D1
D2
D3
D4
DALI Multi-Master Module
753-647
Remark
Control byte
DALI command, DSI dimming value
DALI address
Parameter 2
Parameter 1
Command extension
The DALI Multi-Master module occupies a total of 24 bytes in the input and output range of the process image.
The DALI Multi-Master module can be operated in "Easy" mode (default) and
"Full" mode. "Easy" mode is used to transmit simply binary signals for lighting control. Configuration or programming via DALI master module is unnecessary in "Easy" mode.
Changes to individual bits of the process image are converted directly into DALI commands for a pre-configured DALI network. 22 bytes of the 24-byte process image can be used directly for switching of ECGs, groups or scenes in the Easy mode. Switching commands are transmitted via DALI and group addresses, where each DALI and each group address is represented by a 2-bit pair.
Manual
Version 1.0.0
140 I/O Modules WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
The structure of the process data is described in detail in the following tables.
Table 167: Overview of Input Process Image in the “Easy” Mode
Input process image
Sub-
Index
Offset Byte designation n n+1
0
1
S
-
Remark
Status, activate broadcast
Bit 0: 1-/2-button mode
Bit 2: Broadcast status ON/OFF
Bit 1, 3-7: - res. n+2 2 DA0…DA3 n+3 3 DA4…DA7 n+4 n+5 n+6 n+7 n+8 n+9
4
5
6
7
8
9
DA8…DA11
DA12…DA15
DA16…DA19
DA20…DA23
DA24…DA27
DA28…DA31
Bit pair for DALI address DA0: n+10 n+11 n+12 n+13 n+14 n+15 n+16 n+17 n+18 n+19 n+20 n+21
10
11
12
13
14
15
16
17
18
19
20
21
DA32…DA35
DA36…DA39
DA40…DA43
DA44…DA47
DA48…DA51
DA52…DA55
DA56…DA59
DA60…DA63
GA0…GA3
GA4…GA7
GA8…GA11
GA12…GA15
Bit 1: Bit set = ON
Bit not set = OFF
Bit 2: Bit set = Error
Bit not set = No error
Bit pairs DA1 to DA63 similar to DA0.
Bit pair for DALI group address GA0:
Bit 1: Bit set = ON
Bit not set = OFF
Bit 2: Bit set = Error n+22 22 Bit not set = No error n+23 n+24
23
24 n+25
DA = DALI address
GA = Group address
25
-
-
Bit pairs GA1 to GA15 similar to GA0.
Not used
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
I/O Modules 141
Table 168: Overview of the Output Process Image in the “Easy” Mode
Output process image
Sub-
Index
Offset Byte designation n n+1
0
1
S
-
Remark
Broadcast ON/OFF and activate:
Bit 0: Broadcast ON
Bit 1: Broadcast OFF
Bit 2: Broadcast ON/OFF/dimming
Bit 3: Broadcast short ON/OFF
Bit 4…7: reserved res. n+2 2 DA0…DA3 n+3 n+4
3
4
DA4…DA7
DA8…DA11 n+5 n+6 n+7 n+8 n+9 n+10 n+11 n+12 n+13 n+14 n+15 n+16 n+17 n+18 n+19 n+20 n+21
5
15
16
17
18
19
20
12
13
14
6
7
8
9
10
11
21
DA12…DA15
DA16…DA19
DA20…DA23
DA24…DA27
DA28…DA31
DA32…DA35
DA36…DA39
DA40…DA43
DA44…DA47
DA48…DA51
DA52…DA55
DA56…DA59
DA60…DA63
GA0…GA3
GA4…GA7
GA8…GA11
GA12…GA15
Bit pair for DALI address DA0:
Bit 1: short: DA switch ON long: dimming, brighter
Bit 2: short: DA switch OFF long: dimming, darker
Bit pairs DA1 to DA63 similar to DA0.
Bit pair for DALI group address GA0:
Bit 1: short: GA switch ON long: dimming, brighter
Bit 2: short: GA switch OFF n+22 22 long: dimming, darker n+23 n+24
23
24 n+25
DA = DALI address
GA = Group address
25
Bit 0…7
Bit 8…15
Bit pairs GA1 to GA15 similar to GA0.
Switch to scene 0…15
Manual
Version 1.0.0
142 I/O Modules
LON
®
FTT module
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
753-648
The process image of the LON
®
FTT module consists of a control/status byte and
23 bytes of bidirectional communication data that is processed by the WAGO-
I/OPRO function block "LON_01.lib". This function block is required for the function of the LON
®
FTT module and makes a user interface available on the control side.
EnOcean Radio Receiver I/O Module
750-642
In the input and output process image, the EnOcean radio receiver module occupies a total of 4 bytes of user data: 3 data bytes and 1 additional control/status byte. However, the 3 bytes of output data are not used. 4 bytes are occupied in the process image.
Table 169: EnOcean Radio Receiver I/O Module, 750-642
Input process image
Subindex
Offset Byte designation n n+1
0
1
2
3
S
D0
D1
D2
Table 170: EnOcean Radio Receiver I/O Module, 750-642
Output process image
Subindex
Offset Byte designation n n+1
0
1
2
3
C
-
-
-
Remark
Status byte
Data bytes
Remark
Control byte not used
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Bluetooth
®
RF Transceiver
I/O Modules 143
750-644
The size of the process image for the Bluetooth
®
I/O module can be set at a fixed size of 12, 24 or 48 bytes.
It consists of one control byte (input) or one status byte (output), one empty byte, one 6-, 12- or 18-byte overlayable mailbox (mode 2) and the Bluetooth
®
process data with a size of 4 to 46 bytes.
The Bluetooth
®
I/O module uses between 12 to 48 bytes in the process image. The size of the input and output process images are always the same.
The first byte contains the control/status byte; the second contains an empty byte.
Process data attach to this directly when the mailbox is hidden. When the mailbox is visible, the first 6, 12 or 18 bytes of process data are overlaid by the mailbox data, depending on their size. Bytes in the area behind the optionally visible mailbox contain basic process data. The internal structure of the Bluetooth
® process data can be found in the documentation for the Bluetooth
®
RF
Transceivers 750-644.
Table 171: Bluetooth
®
RF Transceiver, 750-644
Input and Output Process Image
Process image size
12 bytes 24 bytes n PDO n+1 PDO
1 status/
Control byte
1 empty byte
6 bytes mailbox or
6 bytes process data
4 bytes process data
4 bytes empty (reserved)
1 status/
Control byte
1 empty byte
6 bytes mailbox or
6 bytes process data
8 bytes process data n+2 PDO free for next I/O module 8 bytes process data n+3 PDO - free for next I/O module n+4 PDO n+5 PDO n+6 PDO
-
-
-
-
-
-
48 bytes
1 status/
Control byte
1 empty byte
6 bytes mailbox or
6 bytes process data
8 bytes process data
8 bytes process data
8 bytes process data
2 bytes process data
8 bytes process data free for next I/O module
These I/O modules appear as follows depending on the data width set:
Data width
1x12 bytes gateway 1 Input
1x12 bytes gateway 1 output
1x24 bytes gateway 1 Input
1x24 bytes gateway 1 output
1x48 bytes gateway 1 Input
1x48 bytes gateway 1 output
One sub-index is assigned per I/O module.
Object
0x4200
0x4300
0x4200
0x4300
0x4200
0x4300
Manual
Version 1.0.0
144 I/O Modules
MP Bus Master Module
750-643
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
In the input and process image, the MP Bus Master module occupies 8 bytes of user data, 6 data bytes and two additional control/status bytes. 8 bytes are occupied in the process image.
Table 172: MP Bus Master Module 750-643
Input and Output Process Image
Sub-
Index
Offset Byte designation n
0
1
2
3
4
5
6
7
C0/S0
C1/S1
D0
D1
D2
D3
D4
D5
Remark
Control/status byte
Additional control/status byte
Vibration Velocity/Bearing Condition Monitoring VIB I/O
750-645
Data bytes
In both the input and the output process image, the vibration velocity/bearing condition monitoring VIB I/O module occupies 12 bytes of user data: 8 data bytes and 4 additional control/status bytes. 12 bytes are occupied in the process image.
Table 173: Vibration Velocity/Bearing Condition Monitoring VIB I/O, 750-645
Input and Output Process Image
Sub-
Index
Offset Byte designation Remark n
0
1
2
C0/S0
D0
D1
Control/status byte
(log. channel 1, sensor input 1)
Data bytes
(log. channel 1, sensor input 1)
Control/status byte
(log. channel 2, sensor input 2) n+1
3 C1/S1 n+2
4
5
6
7
8
D2
D3
C2/S2
D4
D5
Data bytes
(log. channel 2, sensor input 2)
Control/status byte
(log. channel 3, sensor input 1)
Data bytes
(log. channel 3, sensor input 1) n+3
9
10
11
C3/S3
D6
D7
Control/status byte
(log. channel 4, sensor input 2)
Data bytes
(log. channel 4, sensor input 2)
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
DC Drive Controller
750-636
I/O Modules 145
The I/O module occupies 6 bytes of input and output data in the process image.
The position data to be sent and received is stored in 4 output bytes and 4 input bytes. 2 control/status bytes are used to control the I/O module and drive. In addition to the position data in the input process image, extended status information can also be shown.
Table 174: Input Process Image DC Drive Controller, 750-636
Sub-
Index
Offset
Input process image
Byte designation n
0
1
2
3
4
5
D0
D1
D2
D3
S0
S1
S2
S3
S4
S5
Remark
Status byte S0
Status byte S1
Actual position
(LSB)
Ext. status byte S2
Actual position
Actual position
Actual position
(MSB)
Ext. status byte S3
Ext. status byte S4
Ext. status byte S5
Table 175: Output Process Image DC Drive Controller, 750-636
Sub-
Index
Offset
Output process image
Byte designation n
0
1
2
3
4
5
C0
C1
D0
D1
D2
D3
Remark
Control byte C0
Control byte C1
Setpoint position (LSB)
Setpoint position
Setpoint position
Setpoint position (MSB)
Manual
Version 1.0.0
146 I/O Modules
4-Channel I/O-Link Master
750-657
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
In the input and output process image, the I/O module 750-657 occupies a total of
24 bytes of user data, 20 data bytes and 4 additional control/status bytes, mailbox bytes and SIO bytes. n+8 n+9 n+10 n+11 n+12 n+13 n+14 n+15 n+16 n+17 n+18 n+19 n+20 n+21 n+22 n+23
Table 176: Input/Output Process Image, 4-Channel IO Link Master, 750-657
Sub-
Index
Offset
Input/Output Process Image
Byte designation Remark n
17
18
19
20
13
14
15
16
21
22
23
8
9
10
11
12
4
5
6
7
0
1
2
3 4 bytes
6 bytes
8 bytes
10 bytes
12 bytes
16 bytes
20 bytes
24 bytes
D9
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
S0/C0
FC0
MB0
SIO
D0
D1
D2
D3
D4
D5
D6
D7
D8
Control/status byte
Acyclic channel Register byte 0
Mailbox byte Register byte 1
SIO Byte
Data byte 0
Data byte 1
Data byte 2
Data byte 3
Data byte 4
Data byte 5
Data byte 6
Data byte 7
Data byte 8
Data byte 9
Data byte 10
Data byte 11
Data byte 12
Data byte 13
Data byte 14
Data byte 15
Data byte 16
Data byte 17
Data byte 18
Data byte 19
These I/O modules appear as follows depending on the data width set:
Data width
1x4 bytes input data
1x4 bytes output data
1x6 bytes input data
1x6 bytes output data
1x10/12/16/20/24 bytes input data
1x10/12/16/20/24 bytes output data
Object Sub-index
0x2800
0x2900
0x3200
0x3300
0x380n
0x390n
1 sub-index is occupied per I/O module.
One I/O module is mapped per object. Each data byte assigned to one sub-index.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
CAN Gateway
750-658
I/O Modules 147
The length of the process image of the CAN Gateway I/O module can adjusted to a fixed size of 8, 12, 16, 20, 24, 32, 40 or 48 bytes.
“Sniffer” and “Transparent” Operating Modes n+8 n+9 n+10 n+11 n+12 n+13 n+14 n+15 n+16 n+17 n+18 n+19 n+20 n+21 n+22 n+23 n+24
… n+31 n+32
… n+47
Table 177: CAN Gateway Input/Output Process Image, 750-658
Sub-
Index
Offset
Input/Output Process Image
Byte designation n
23
24
…
31
32
…
47
17
18
19
20
13
14
15
16
21
22
8
9
10
11
12
4
5
6
7
0
1
2
3
8 bytes
12 bytes
16 bytes
20 bytes
24 bytes
32 bytes
48 bytes
D15
D16
…
D23
D24
…
D39
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
S0/C0
MBX0
MBX1
MBX2
MBX3
MBX4
MBX5
MBX6
D0
D1
D2
D3
D4
Remark
Control/status byte
Mailbox byte 0
Mailbox byte 1
Mailbox byte 2
Mailbox byte 3
Mailbox byte 4
Mailbox byte 5
Mailbox byte 6
Data byte 0
Data byte 1
Data byte 2
Data byte 3
Data byte 4
Data byte 5
Data byte 6
Data byte 7
Data byte 8
Data byte 9
Data byte 10
Data byte 11
Data byte 12
Data byte 13
Data byte 14
Data byte 15
Data byte 16
…
Data byte 23
Data byte 24
…
Data byte 39
Manual
Version 1.0.0
148 I/O Modules WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
These I/O modules appear as follows depending on the data width set:
Data width
1x8 bytes input data
1x8 bytes output data
1x12/16/20/24/32/40/48 bytes input data
1x12/16/20/24/32/40/48 bytes output data
Object
0x3600
0x3700
0x380n
0x390n
Sub-index
1 sub-index is occupied per I/O module.
One I/O module is mapped per object. Each data byte assigned to one sub-index.
“Mapped” Operating Mode n+8 n+9 n+10 n+11 n+12 n+13 n+14 n+15 n+16 n+17 n+18 n+19 n+20 n+21 n+22 n+23 n+24
… n+31 n+32
… n+47
Table 178: CAN Gateway Input/Output Process Image, 750-658
Sub-
Index
Offset
Input/Output Process Image
Byte designation n
15
16
17
18
11
12
13
14
19
20
21
31
32
…
47
22
23
24
…
0
5
6
7
8
1
2
3
4
9
10
8 bytes
12 bytes
16 bytes
20 bytes
24 bytes
32 bytes
48 bytes
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
…
D22
D23
…
D38
S0/C0
MBX0
MBX1
MBX2
MBX3
MBX4
MBX5
MBX6
T
D0
D1
Remark
Control/status byte
Mailbox byte 0
Mailbox byte 1
Mailbox byte 2
Mailbox byte 3
Mailbox byte 4
Mailbox byte 5
Mailbox byte 6
Toggle bit
Data byte 0
Data byte 1
Data byte 2
Data byte 3
Data byte 4
Data byte 5
Data byte 6
Data byte 7
Data byte 8
Data byte 9
Data byte 10
Data byte 11
Data byte 12
Data byte 13
Data byte 14
Data byte 15
…
Data byte 22
Data byte 23
…
Data byte 38
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
I/O Modules 149
These I/O modules appear as follows depending on the data width set:
Data width
1x8 bytes input data
1x8 bytes output data
1x12/16/20/24/32/40/48 bytes input data
1x12/16/20/24/32/40/48 bytes output data
Proportional Valve Module
750-632
Object
0x3600
0x3700
0x380n
0x390n
Sub-index
1 sub-index is occupied per I/O module.
One I/O module is mapped per object. Each data byte assigned to one sub-index.
The proportional valve module appears in 1-channel operation (1 valve) with 6 bytes, and in 2-channel operation (2 valves) with 12 Bytes.
1-Channel Mode
Table 179: Proportional Valve Module Input Process Image
Sub-
Index
Offset
Input process image
Byte designation Remark n
0
1
2
3
S0
MBX_ST
MBX_DATA
V1_STATUS
Status byte
Mailbox status byte
Mailbox data
Valve 1 control
4 V1_ACTUAL_L Valve 1, actual value, low byte
5 V1_ACTUAL_H
Table 180: Proportional Valve Module Output Process Image
Valve 1, actual valve, high byte
Sub-
Index
Offset
Output process image
Byte designation Remark n
3
4
5
0
1
2
C0
MBX_CTRL
MBX_DATA
V1_CONTROL
V1_SETPOINTVALUE_L
V1_SETPOINTVALUE_H
Control byte
Mailbox control byte
Mailbox data
Valve 1 control
Valve 1, setpoint, low byte
Valve 1, setpoint, high byte
Manual
Version 1.0.0
150 I/O Modules
2-Channel Mode
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Sub-
Index n n+1 n+2 n+3 n+4 n+5 n+6 n+7 n+8 n+9 n+10 n+11
Table 181: Proportional Valve Module Input Process Image
Sub-
Index n
Offset
Input process image
Byte designation Remark n+1 n+2 n+3 n+4 n+5 n+6 n+7 n+8 n+9 n+10
0
1
2
3
4
5
6
7
8
9
10
S0
MBX_ST
MBX_DATA1
MBX_DATA2
MBX_DATA3
MBX_DATA4
V1_STATUS
V2_STATUS
V1_ACTUAL_L
V1_ACTUAL_H
V2_ACTUAL_L
Status byte
Mailbox status byte
Mailbox data
Valve 1 control
Valve 2 control
Valve 1, actual value, low byte
Valve 1, actual value, low byte
Valve 2, actual value, low byte n+11 11 V2_ACTUAL_H
Table 182: Proportional Valve Module Output Process Image
Valve 2, actual value, low byte
Offset
Output process image
Byte designation Remark
8
9
10
11
4
5
6
7
0
1
2
3
C0
MBX_CTRL
MBX_DATA1
MBX_DATA2
MBX_DATA3
MBX_DATA4
V1_CONTROL
V2_CONTROL
V1_SETPOINTVALUE_L
V1_SETPOINTVALUE_H
V2_SETPOINTVALUE_L
V2_SETPOINTVALUE_H
Control byte
Mailbox control byte
Mailbox data
Valve 1 control
Valve 2 control
Valve 1, setpoint, low byte
Valve 1, setpoint, high byte
Valve 2, setpoint, low byte
Valve 2, setpoint, high byte
AS Interface Master Module
750-655
The process image size for the AS interface master module is adjustable to: 12,
20, 24, 32, 40 or 48 bytes.
It consists of a control or status byte, a mailbox with 0, 6, 10, 12 or 18 bytes and 0 to 32 bytes of AS interface process data.
The AS interface master module occupies 6 to a maximum of 24 words in the process image with word alignment.
The first input or output word contains the status or control byte, and an empty byte.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
I/O Modules 151
Subsequently, mailbox data is mapped when the mailbox is permanently superimposed (Mode 1).
While in operating mode with a suppressible mailbox (Mode 2), the mailbox and the cyclical process data are mapped next.
The remaining words contain the remaining process data.
The mailbox and the process image sizes are set with the WAGO-I/OCHECK startup tool.
Table 183: AS Interface Master Module, 750-655
Input and Output Process Image
Byte designation
Offset
High byte Low-byte
0 - C0/S0
1
2
3
... max.
23
D1
D3
D5
...
D45
D0
D2
D4
...
D44
11.2.6 System Modules
not used
Remark
Control/status byte
Mailbox (0, 3, 5, 6 or 9 words) and process data (0 ‒ 16 words)
System Modules with Diagnostics
750-610, -611
Power supply modules 750-610 and -611 with diagnostics provide 2 bits to monitor the power supply.
Table 184: System Modules with Diagnostics, 750-610, -611
Input process image
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Diag. bit
S 2
Fuse
Bit 0
Diag. bit
S 1
Voltage
11.2.6.1 Binary Space Module
750-622
The Binary Space Modules behave alternatively like 2 channel digital input modules or output modules and seize depending upon the selected settings 1, 2, 3 or 4 bits per channel. According to this, 2, 4, 6 or 8 bits are occupied then either in the process input or the process output image.
Table 185: Binary Space Module 750-622 (with Behavior Like 2 Channel Digital Input)
Input and Output Process Image
Bit 7
(Data bit
DI 8)
Bit 6
(Data bit
DI 7)
Bit 5
(Data bit
DI 6)
Bit 4
(Data bit
DI 5)
Bit 3
(Data bit
DI 4)
Bit 2
(Data bit
DI 3)
Bit 1
Data bit
DI 2
Bit 0
Data bit
DI 1
Manual
Version 1.0.0
152 Use in Hazardous Environments WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
12 Use in Hazardous Environments
The WAGO-I/O-SYSTEM 750 (electrical equipment) is designed for use in
Zone 2 hazardous areas.
The following sections include both the general identification of components
(devices) and the installation regulations to be observed. The individual subsections of the “Installation Regulations” section must be taken into account if the I/O module has the required approval or is subject to the range of application of the ATEX directive.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Use in Hazardous Environments 153
12.1 Marking Configuration Examples
12.1.1 Marking for Europe According to ATEX and IEC-Ex
Figure 45: Side Marking Example for ATEX and IEC Ex Approved I/O Modules According to
CENELEC and IEC
Figure 46: Printing Text Detail – Marking Example for ATEX and IEC Ex Approved I/O Modules
According to CENELEC and IEC
Table 186: Description of Marking Example for ATEX and IEC Ex Approved I/O Modules
According to CENELEC and IEC
Printing on Text Description
DEMKO 08 ATEX 142851 X
IECEx PTB 07.0064X
I M2 / II 3 GD
Ex nA
IIC
T4
Approval body and/or number of the examination certificate
Explosion protection group and Unit category
Type of ignition and extended identification
Explosion protection group
Temperature class
Manual
Version 1.0.0
154 Use in Hazardous Environments WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Figure 47: Side Marking Example for Ex i and IEC Ex i Approved I/O Modules According to
CENELEC and IEC
Figure 48: Text Detail – Marking Example for Ex i and IEC Ex i Approved I/O Modules
According to CENELEC and IEC
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Use in Hazardous Environments 155
Table 187: Description of Marking Example for Ex i and IEC Ex i Approved I/O Modules
According to CENELEC and IEC
Inscription text
TÜV 07 ATEX 554086 X
TUN 09.0001X
Description
Approving authority or certificate numbers
Dust
II
3(1)D
Ex tD
[iaD]
Device group: All except mining
Device category: Zone 22 device (Zone 20 subunit)
Explosion protection mark
Protection by enclosure
Approved in accordance with "Dust intrinsic safety" standard
A22 Surface temperature determined according to
Procedure A, use in Zone 22
Dust-tight (totally protected against dust)
Max. surface temp. of the enclosure (no dust bin)
IP6X
T 135°C
Mining
I
(M2)
[Ex ia]
Device group: Mining
Device category: High degree of safety
Explosion protection: Mark with category of type of protection intrinsic safety: Even safe when two errors occur
Device group: Mining I
Gases
II
3(1)G
Ex nA
[ia]
IIC
T4
Device group: All except mining
Device category: Zone 2 device (Zone 0 subunit)
Explosion protection mark
Type of protection: Non-sparking operating equipment
Category of type of protection intrinsic safety: Even safe when two errors occur
Explosion Group
Temperature class: Max. surface temperature 135°C
Manual
Version 1.0.0
156 Use in Hazardous Environments WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
12.1.2 Marking for America According to NEC 500
Figure 49: Side Marking Example for I/O Modules According to NEC 500
Figure 50: Text Detail – Marking Example for I/O Modules According to NEC 500
Table 188: Description of Marking Example for I/O Modules According to NEC 500
Printing on Text
CL 1
DIV 2
Grp. ABCD
Optemp code T4
Description
Explosion protection group (condition of use category)
Area of application (zone)
Explosion group (gas group)
Temperature class
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Use in Hazardous Environments 157
12.2 Installation Regulations
In the Federal Republic of Germany , various national regulations for the installation in explosive areas must be taken into consideration. The basis for this forms the working reliability regulation, which is the national conversion of the
European guideline 99/92/E6. They are complemented by the installation regulation EN 60079-14. The following are excerpts from additional VDE regulations:
Table 189: VDE Installation Regulations in Germany
DIN VDE 0100 Installation in power plants with rated voltages up to 1000 V
DIN VDE 0101 Installation in power plants with rated voltages above 1 kV
DIN VDE 0800 Installation and operation in telecommunication plants including information processing equipment
DIN VDE 0185 lightning protection systems
The USA and Canada have their own regulations. The following are excerpts from these regulations:
Table 190: Installation Regulations in USA and Canada
NFPA 70 National Electrical Code Art. 500 Hazardous Locations
ANSI/ISA-RP 12.6-1987 Recommended Practice
C22.1 Canadian Electrical Code
Notice the following points
When using the WAGO-I/O SYSTEM 750 (electrical operation) with Ex approval, the following points are mandatory:
Manual
Version 1.0.0
158 Use in Hazardous Environments WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
12.2.1 Special Conditions for Safe Operation of the ATEX and IEC
Ex (acc. DEMKO 08 ATEX 142851X and IECEx PTB 07.0064)
The fieldbus-independent I/O modules of the WAGO-I/O-SYSTEM 750-.../...-... must be installed in an environment with degree of pollution 2 or better. In the final application, the I/O modules must be mounted in an enclosure with IP 54 degree of protection at a minimum with the following exceptions:
- I/O modules 750-440, 750-609 and 750-611 must be installed in an IP 64 minimum enclosure.
- I/O module 750-540 must be installed in an IP 64 minimum enclosure for
230 V AC applications.
- I/O module 750-440 may be used up to max. 120 V AC.
When used in the presence of combustible dust, all devices and the enclosure shall be fully tested and assessed in compliance with the requirements of IEC 61241-
0:2004 and IEC 61241-1:2004.
When used in mining applications the equipment shall be installed in a suitable enclosure according to EN 60079-0:2006 and EN 60079-1:2007.
I/O modules fieldbus plugs or fuses may only be installed, added, removed or replaced when the system and field supply is switched off or the area exhibits no explosive atmosphere.
DIP switches, coding switches and potentiometers that are connected to the I/O module may only be operated if an explosive atmosphere can be ruled out.
I/O module 750-642 may only be used in conjunction with antenna 758-910 with a max. cable length of 2.5 m.
To exceed the rated voltage no more than 40%, the supply connections must have transient protection.
The permissible ambient temperature range is 0 °C to +55 °C.
Manual
Version 1.0.0
WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
Use in Hazardous Environments 159
12.2.2 Special conditions for safe use (ATEX Certificate TÜV 07
ATEX 554086 X)
1. For use as Gc- or Dc-apparatus (in zone 2 or 22) the field bus independent
I/O modules WAGO-I/O-SYSTEM 750-*** shall be erected in an enclosure that fulfils the requirements of the applicable standards (see the marking)
EN 60079-0, EN 60079-11, EN 60079-15, EN 61241-0 and EN 61241-1.
For use as group I, electrical apparatus M2, the apparatus shall be erected in an enclosure that ensures a sufficient protection according to EN 60079-0 and EN 60079-1 and the degree of protection IP64. The compliance of these requirements and the correct installation into an enclosure or a control cabinet of the devices shall be certified by an ExNB.
2. If the interface circuits are operated without the field bus coupler station type 750-3../…-… (DEMKO 08 ATEX 142851 X), measures must be taken outside of the device so that the rating voltage is not being exceeded of more than 40% because of transient disturbances.
3. DIP-switches, binary-switches and potentiometers, connected to the module may only be actuated when explosive atmosphere can be excluded.
4. The connecting and disconnecting of the non-intrinsically safe circuits is only permitted during installation, for maintenance or for repair purposes.
The temporal coincidence of explosion hazardous atmosphere and installation, maintenance resp. repair purposes shall be excluded. This is although and in particular valid for the interfaces “CF-Card”, “USB”,
“Fieldbus connection“, “Configuration and programming interface“,
“antenna socket“, “D-Sub“ and the “Ethernet interface“. These interfaces are not energy limited or intrinsically safe circuits. An operating of those circuits is in the behalf of the operator.
5. For the types 750-606, 750-625/000-001, 750-487/003-000, 750-484 and
750-633 the following shall be considered: The interface circuits shall be limited to overvoltage category I/II/III (non mains/mains circuits) as defined in EN 60664-1.
6. For the type 750-601 the following shall be considered: Do not remove or replace the fuse when the apparatus is energized.
7.
The ambient temperature range is: 0°C ≤ T a
≤ +55°C (for extended details please note certificate).
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8. The following warnings shall be placed nearby the unit:
Do not remove or replace fuse when energized!
If the module is energized do not remove or replace the fuse.
Do not separate when energized!
Do not separate the module when energized!
Separate only in a non-hazardous area!
Separate the module only in a non-hazardous area!
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Use in Hazardous Environments 161
12.2.3 Special conditions for safe use (IEC-Ex Certificate TUN
09.0001 X)
1. For use as Dc- or Gc-apparatus (in zone 2 or 22) the fieldbus independent
I/O modules WAGO-I/O-SYSTEM 750-*** shall be erected in an enclosure that fulfils the requirements of the applicable standards (see the marking)
IEC 60079-0, IEC 60079-11, IEC 60079-15, IEC 61241-0 and IEC 61241-1.
For use as group I, electrical apparatus M2, the apparatus shall be erected in an enclosure that ensures a sufficient protection according to IEC 60079-0 and IEC 60079-1 and the degree of protection IP64. The compliance of these requirements and the correct installation into an enclosure or a control cabinet of the devices shall be certified by an ExCB.
2. Measures have to be taken outside of the device that the rating voltage is not being exceeded of more than 40% because of transient disturbances.
3. DIP-switches, binary-switches and potentiometers, connected to the module may only be actuated when explosive atmosphere can be excluded.
4. The connecting and disconnecting of the non-intrinsically safe circuits is only permitted during installation, for maintenance or for repair purposes.
The temporal coincidence of explosion hazardous atmosphere and installation, maintenance resp. repair purposes shall be excluded. This is although and in particular valid for the interfaces “CF-Card”, “USB”,
“Fieldbus connection“, “Configuration and programming interface“,
“antenna socket“, “D-Sub“ and the “Ethernet interface“. These interfaces are not energy limited or intrinsically safe circuits. An operating of those circuits is in the behalf of the operator.
5. For the types 750-606, 750-625/000-001, 750-487/003-000, 750-484 and
750-633 the following shall be considered: The interface circuits shall be limited to overvoltage category I/II/III (non mains/mains circuits) as defined in IEC 60664-1.
6. For the type 750-601 the following shall be considered: Do not remove or replace the fuse when the apparatus is energized.
7.
The ambient temperature range is: 0°C ≤ T a
≤ +55°C (For extensions please see the certificate).
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8. The following warnings shall be placed nearby the unit:
Do not remove or replace fuse when energized!
If the module is energized do not remove or replace the fuse.
Do not separate when energized!
Do not separate the module when energized!
Separate only in a non-hazardous area!
Separate the module only in a non-hazardous area!
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Use in Hazardous Environments 163
12.2.4 ANSI/ISA 12.12.01
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or non-hazardous locations only.
This equipment is to be fitted within tool-secured enclosures only.
Explosion hazard!
Explosion hazard - substitution of components may impair suitability for Class I,
Div. 2.
Disconnect device when power is off and only in a non-hazardous area!
Do not disconnect equipment unless power has been switched off or the area is known to be non-hazardous near each operator accessible connector and fuse holder." When a fuse is provided, the following information shall be provided: “A switch suitable for the location where the equipment is installed shall be provided to remove the power from the fuse.”
For devices with ETHERNET connectors:
”Only for use in LAN, not for connection to telecommunication circuits”.
Use only with antenna module 758-910!
Use Module 750-642 only with antenna module 758-910.
For Couplers/Controllers and Economy bus modules only: "The configuration
Interface Service connector is for temporary connection only. Do not connect or disconnect unless the area is known to be nonhazardous. Connection or disconnection in an explosive atmosphere could result in an explosion.
Devices containing fuses must not be fitted into circuits subject to over loads!
Devices containing fuses must not be fitted into circuits subject to over loads, e.g. motor circuits!
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For devices equipped with SD card slots: Insert or remove the SD cards unless the area known to be free of ignitable concentrations of flammable gases or vapors!
Do not connect or disconnect SD-Card while circuit is live unless the area is known to be free of ignitable concentrations of flammable gases or vapors.
Additional Information
Proof of certification is available on request.
Also take note of the information given on the operating and assembly instructions.
The manual, containing these special conditions for safe use, must be readily available to the user.
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166 List of Figures WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
List of Figures
Figure 2: Labeling on the Side of a Component (Example).................................. 15
Figure 3: Example of a Manufacturing Number ................................................... 15
Figure 4: Isolation for Fieldbus Couplers/Controllers (Example) ......................... 18
Figure 5: System Supply via Fieldbus Coupler/Controller (left) and via Internal
Figure 6: System Voltage for Standard Couplers/Controllers and Extended ECO
Figure 7: Field Supply for Standard Couplers/Controllers and Extended ECO
Figure 8: Supply Module with Fuse Carrier (Example 750-610) ......................... 25
Figure 12: Fuse Modules for Automotive Fuses, Series 282 ................................ 27
Figure 13: Fuse Modules for Automotive Fuses, Series 2006 .............................. 27
Figure 14: Fuse Modules with Pivotable Fuse Carrier, Series 281 ....................... 27
Figure 15: Fuse Modules with Pivotable Fuse Carrier, Series 2002 ..................... 27
Figure 17: Supply Example for Standard Couplers/Controllers ........................... 29
Figure 19: Examples of the WAGO Shield Connecting System ........................... 35
Figure 20: Application of the WAGO Shield Connecting System ....................... 35
Figure 21: View MODBUS RTU Fieldbus Controller ......................................... 37
Figure 23: Pin Assignment for D-Sub Fieldbus Connection (Female) ................. 40
Figure 25: Service Interface (Closed and Opened Flap) ....................................... 42
Figure 26: Mode Selector Switch (Closed and Open Damper of the Service Port)
Figure 29: Release Tab Standard Fieldbus Coupler/Controller (Example) .......... 63
Figure 31: Snap the I/O Module into Place (Example) ......................................... 64
Figure 32: Removing the I/O Module (Example) ................................................. 65
Figure 34: Example for the Arrangement of Power Contacts ............................... 67
Figure 35: Connecting a Conductor to a CAGE CLAMP
................................... 68
Figure 37: Example of an Input Process Image .................................................... 72
Figure 39: Memory Areas and Data Exchange ..................................................... 75
Figure 40: Data Exchange Between the MODBUS Master and the I/O Modules 78
Figure 44: Using MODBUS Functions for a Fieldbus Coupler/Controller .......... 92
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List of Figures 167
Figure 45: Side Marking Example for ATEX and IEC Ex Approved I/O Modules
According to CENELEC and IEC ............................................................. 153
Figure 46: Printing Text Detail – Marking Example for ATEX and IEC Ex
Approved I/O Modules According to CENELEC and IEC ....................... 153
Figure 47: Side Marking Example for Ex i and IEC Ex i Approved I/O Modules
According to CENELEC and IEC ............................................................. 154
Figure 48: Text Detail – Marking Example for Ex i and IEC Ex i Approved I/O
Modules According to CENELEC and IEC .............................................. 154
Figure 49: Side Marking Example for I/O Modules According to NEC 500 ..... 156
Figure 50: Text Detail – Marking Example for I/O Modules According to NEC
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168 List of Tables WAGO-I/O-SYSTEM 750
750-316/300-000 Fieldbus Coupler MODBUS RTU
List of Tables
Table 5: Legend for Figure “Field Supply for Standard Couplers/Controllers and
Table 8: Legend for Figure “Supply Example for Fieldbus Coupler/Controller” . 30
Table 9: WAGO Power Supply Units (Selection) ................................................. 31
Table 10: WAGO Ground Wire Terminals ........................................................... 32
Table 11: Key for View of MODBUS RTU Fieldbus Coupler ............................. 38
Table 12: Bus Connection and Connection Plug Arrangement for the RS-232 .... 40
Table 16: Legend for Figure “Service Interface (Closed and Opened Flap)” ....... 42
Table 18: Operating Mode Selector Switch Positions, Static Positions for
Table 19: Mode Selector Switch Positions, Dynamic Positions During the Current
Table 22: Technical Data – Device Data ............................................................... 52
Table 23: Technical Data – System Data .............................................................. 52
Table 24: Technical Data – Field Wiring .............................................................. 52
Table 25: Technical Data – Power Jumper Contacts ............................................ 52
Table 26: Technical Data – Data Contacts ............................................................ 52
Table 27: Technical Data – Climatic Environmental Conditions ......................... 53
Table 28: Technical Data – Mechanical Strength acc. to IEC 61131-2 ................ 53
Table 30: Data Width of the I/O Modules (Examples) ......................................... 77
Table 31: Assignment of Digital Inputs and Outputs to Process Data Words
Table 33: Fieldbus Diagnostics – Solution in Event of Error ............................... 81
Table 34: Node Status Diagnostics – Solution in Event of Error .......................... 82
Table 35: Blink Code- Table for the I/O LED Signaling, Error Code 1 ............... 84
Table 36: Blink Code Table for the I/O LED Signaling, Error Code 2 ................ 85
Table 37: Blink Code Table for the I/O LED Signaling, Error Code 3 ................ 86
Table 38: Blink Code Table for the I/O LED Signaling, Error Code 4 ................ 87
Table 39: Blink Code Table for the I/O LED Signaling, Error Code 5 ................ 87
Table 40: Blink Code Table for the 'I/O' LED Signaling, Error Code 7…8 ......... 88
Table 41: Blink Code Table for the I/O LED Signaling, Error Code 9 ................ 88
Table 42: Power Supply Status Diagnostics – Solution in Event of Error ............ 88
Table 43: Basic Data Types for the MODBUS Protocol ...................................... 90
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List of Tables 169
Table 44: List of MODBUS Functions Implemented in the Fieldbus Coupler ..... 91
Table 46: Request Structure for Function Codes FC1 and FC2 ............................ 94
Table 47: Response Structure for Function Codes FC1 and FC2 ......................... 94
Table 49: Exception Structure for Function Codes FC1 and FC2 ........................ 95
Table 50: Request Structure for Function Codes FC3 and FC4 ............................ 95
Table 51: Response Structure for Function Codes FC3 and FC4 ......................... 96
Table 52: Exception Structure for Function Codes FC3 and FC4 ........................ 96
Table 53: Request Structure for Function Code FC5 ............................................ 96
Table 54: Response Structure for Function Code FC5 .......................................... 97
Table 55: Exception Structure for Function Code FC5 ......................................... 97
Table 56: Request Structure for Function Code FC6 ............................................ 97
Table 57: Response Structure for Function Code FC6 .......................................... 98
Table 58: Exception Structure for Function Code FC6 ......................................... 98
Table 59: Request Structure for Function Code FC11 .......................................... 98
Table 60: Response Structure for Function Code FC11 ........................................ 99
Table 61: Exception Structure for Function Code FC11 ....................................... 99
Table 62: Request Structure for Function Code FC15 ........................................ 100
Table 63: Response Structure for Function Code FC15 ...................................... 100
Table 64: Exception Structure for Function code FC15 ...................................... 100
Table 65: Request Structure for Function Code FC16 ........................................ 101
Table 66: Response Structure for Function Code FC16 ...................................... 101
Table 67: Exception Structure for Function Code FC16 ..................................... 101
Table 68: Request Structure for Function Code FC23 ........................................ 102
Table 69: Response Structure for Function Code FC23 ...................................... 102
Table 70: Exception Structure for Function Code FC23 ..................................... 102
Table 71: Read register Access (with FC3, FC4 and FC23) ............................... 103
Table 72: Write Register Access (with FC6, FC16 and FC23) ........................... 103
Table 73: Read bit access (with FC1 and FC2) ................................................... 104
Table 74: Bit access writing (with FC5 and FC15) ............................................. 104
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Table 114: 1-Channel Digital Input Modules with Status ................................... 116
Table 116: 2-Channel Digital Input Modules with Diagnostics .......................... 117
Table 117: 2-channel digital input modules with diagnostics and output data ... 117
Table 120: 16-Channel Digital Input Modules .................................................... 118
Table 121: 1-Channel Digital Output Modules with Input Data ......................... 119
Table 122: 2-Channel Digital Output Modules ................................................... 119
Table 123: 2-Channel Digital Output Modules with Input Data ......................... 119
Table 124: 4-Channel Digital Output Modules 75x-506 with Input Data .......... 120
Table 125: 4-Channel Digital Output Modules ................................................... 120
Table 126: 4-Channel Digital Output Modules 750-532 with Input Data .......... 121
Table 127: 8-Channel Digital Output Modules ................................................... 121
Table 128: 4-Channel Digital Output Modules 750-537 with Input Data .......... 121
Table 129: 16-Channel Digital Output Modules ................................................. 122
Table 130: 8-Channel Digital Input/Output Modules ......................................... 122
Table 131: 1-Channel Analog Input Modules ..................................................... 123
Table 132: 2-Channel Analog Input Modules ..................................................... 123
Table 133: 4-Channel Analog Input Modules ..................................................... 123
Table 134: 8-Channel Analog Input Modules ..................................................... 124
Table 135: 2-Channel Analog Output Modules .................................................. 125
Table 136: 4-Channel Analog Output Modules .................................................. 125
Table 137: 8-Channel Analog Output Modules .................................................. 126
Table 138: Counter Modules 750-404, 753-404 ................................................. 127
Table 139: Counter Modules 750-404, 753-404 ................................................. 127
Table 140: Counter Modules 750-404/000-005 .................................................. 127
Table 141: Counter Modules 750-404/000-005 .................................................. 128
Table 142: Counter Modules 750-638, 753-638 ................................................. 128
Table 143: Counter Modules 750-638, 753-638 ................................................. 128
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List of Tables 171
Table 144: 3-Phase Power Measurement Modules 750-493 ............................... 129
Table 145: 3-Phase Power Measurement Modules 750-494, -495 ..................... 129
Table 146: 3-Phase Power Measurement Modules 750-494, -495 ..................... 130
Table 147: Pulse Width Modules 750-511 / xxx-xxx ......................................... 131
Table 148: Serial Interfaces with Alternative Data Format ................................ 131
Table 149: Serial Interface with Standard Data Format ...................................... 132
Table 150: Input/Output Process Image of the KNX/EIB/TP1-Module ............. 132
Table 151: Input/Output Process Image “Serial Interface”, Serial Transmission
Table 152: Input/Output Process Image “Serial Interface”, Data Exchange Mode
Table 154: SSI transmitter interface modules with alternative data format ........ 134
Table 155: SSI Transmitter Interface Modules with Standard Data Format ....... 135
Table 156: Distance and Angle Measurement Modules ..................................... 135
Table 157: Distance and Angle Measurement Modules ..................................... 135
Table 158: Incremental Encoder Interface 750-634 ............................................ 136
Table 159: Incremental Encoder Interface, 750-634 ........................................... 136
Table 160:Inkremental Encoder Interface, 750-637 ............................................ 136
Table 161: Digitale Impulse Interface, 750-635 ................................................. 137
Table 163: Input Process Image, Stepper Module with Mailbox Deactivated .... 138
Table 164: Output Process Image, Stepper Module with Mailbox Activated ..... 138
Table 165: DALI/DSI Master Module 750-641 .................................................. 139
Table 166: DALI/DSI Master Module 750-641 .................................................. 139
Table 167: Overview of Input Process Image in the “Easy” Mode .................... 140
Table 168: Overview of the Output Process Image in the “Easy” Mode ............ 141
Table 169: EnOcean Radio Receiver I/O Module, 750-642 ............................... 142
Table 170: EnOcean Radio Receiver I/O Module, 750-642 ............................... 142
RF Transceiver, 750-644 ................................................ 143
Table 172: MP Bus Master Module 750-643 ...................................................... 144
Table 173: Vibration Velocity/Bearing Condition Monitoring VIB I/O, 750-645
Table 174: Input Process Image DC Drive Controller, 750-636 ......................... 145
Table 175: Output Process Image DC Drive Controller, 750-636 ...................... 145
Table 176: Input/Output Process Image, 4-Channel IO Link Master, 750-657 .. 146
Table 177: CAN Gateway Input/Output Process Image, 750-658 ...................... 147
Table 178: CAN Gateway Input/Output Process Image, 750-658 ...................... 148
Table 179: Proportional Valve Module Input Process Image ............................. 149
Table 180: Proportional Valve Module Output Process Image .......................... 149
Table 181: Proportional Valve Module Input Process Image ............................. 150
Table 182: Proportional Valve Module Output Process Image .......................... 150
Table 183: AS Interface Master Module, 750-655 .............................................. 151
Table 184: System Modules with Diagnostics, 750-610, -611 ........................... 151
Table 185: Binary Space Module 750-622 (with Behavior Like 2 Channel Digital
Table 186: Description of Marking Example for ATEX and IEC Ex Approved I/O
Modules According to CENELEC and IEC .............................................. 153
Table 187: Description of Marking Example for Ex i and IEC Ex i Approved I/O
Modules According to CENELEC and IEC .............................................. 155
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750-316/300-000 Fieldbus Coupler MODBUS RTU
Table 188: Description of Marking Example for I/O Modules According to NEC
Table 189: VDE Installation Regulations in Germany ....................................... 157
Table 190: Installation Regulations in USA and Canada .................................... 157
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WAGO Kontakttechnik GmbH & Co. KG
Postfach 2880 • D-32385 Minden
Hansastraße 27 • D-32423 Minden
Phone: +49/5 71/8 87 – 0
Fax:
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Internet:
+49/5 71/8 87 – 1 69 [email protected] http://www.wago.com
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Table of contents
- 6 Notes about this Documentation
- 6 Validity of this Documentation
- 6 Copyright
- 7 Symbols
- 9 Number Notation
- 9 Font Conventions
- 10 Important Notes
- 10 Legal Bases
- 10 Subject to Changes
- 10 Personnel Qualifications
- 10 Provisions
- 11 Technical Condition of Specified Devices
- 12 Safety Advice (Precautions)
- 14 System Description
- 15 Manufacturing Number
- 16 Component Update
- 16 Storage, Assembly and Transport
- 17 Assembly Guidelines/Standards
- 18 Power Supply
- 18 Isolation
- 19 System Supply
- 19 Connection
- 20 Dimensioning
- 23 Field Supply
- 23 Connection
- 25 Fusing
- 28 Supplementary Power Supply Regulations
- 29 Supply Example
- 31 Power Supply Unit
- 32 Grounding
- 32 Grounding the DIN Rail
- 32 Framework Assembly
- 32 Insulated Assembly
- 33 Grounding Function
- 34 Shielding
- 34 General
- 34 Bus Cables
- 35 Signal Lines
- 35 WAGO Shield Connecting System
- 36 Device Description
- 39 Connectors
- 39 Device Supply
- 40 Fieldbus Connection
- 41 Display Elements
- 42 Operating Elements
- 42 Service Interface
- 43 Mode Selector Switch
- 49 Manual Configuration
- 52 Technical Data
- 52 Device Data
- 52 System Data
- 52 Connection Type
- 53 Climatic Environmental Conditions
- 53 Mechanical Strength acc. to IEC
- 54 Approvals
- 56 Standards and Guidelines
- 57 Mounting
- 57 Installation Position
- 57 Overall Configuration
- 59 Mounting onto Carrier Rail
- 59 Carrier Rail Properties
- 60 WAGO DIN Rail
- 60 Spacing
- 61 Mounting Sequence
- 62 Inserting and Removing Devices
- 63 Inserting the Fieldbus Coupler/Controller
- 63 Removing the Fieldbus Coupler/Controller
- 64 Inserting the I/O Module
- 65 Removing the I/O Module
- 66 Connect Devices
- 66 Data Contacts/Internal Bus
- 67 Power Contacts/Field Supply
- 69 Function Description
- 69 Startup of the Fieldbus Coupler
- 71 Process Data Architecture
- 71 Basic Setup
- 72 Example of an Input Process Image
- 73 Example of an Output Process Image
- 74 Process Data MODBUS RTU
- 75 Data Exchange
- 75 Memory Space
- 76 Addressing
- 76 Adressing the I/O Modules
- 79 Commissioning
- 80 Diagnostics
- 80 LED Signaling
- 81 Evaluating Fieldbus Status
- 82 Evaluating Node Status – I/O LED (Blink Code Table)
- 163 Figure 1: Fieldbus Node (Example)
- 164 Figure 2: Labeling on the Side of a Component (Example)
- 164 Figure 3: Example of a Manufacturing Number
- 167 Figure 4: Isolation for Fieldbus Couplers/Controllers (Example)
- 168 System Supply Module (right)
- 169 Couplers
- 174 Figure 8: Supply Module with Fuse Carrier (Example 750-610)