Allen-Bradley Compact 8-Bit Low Resolution Analog I/O Combination Module User Manual

(Installation and Wiring)

Ensure that your power supply has sufficient current output to support your system configuration. The modules maximum current draw is shown below.

Module

1769-IF4XOF2

5V dc

120 mA

24V dc

160 mA

TIP

The module cannot be located more than 8 modules away from the system power supply.

Step 2:

Attach and lock the module.

Reference

(Installation and Wiring) a. Check that the bus lever of the module to be installed is in the unlocked (fully right) position.

b. Use the upper and lower tongue-and-groove slots to secure the modules together (or to a controller).

c. Move the module back along the tongue-and-groove slots until the bus connectors line up with each other.

d. Push the bus lever back slightly to clear the positioning tab. Use your fingers or a small screwdriver.

Publication 1769-UM008A-EN-P - November 2001

Quick Start for Experienced Users 2-3

Step 3:

e. To allow communication between the controller and module, move the bus lever fully to the left until it clicks. Ensure it is locked firmly in place.

ATTENTION

When attaching I/O modules, it is very important that the bus connectors are securely locked together to ensure proper electrical connection.

f. Attach an end cap terminator to the last module in the system by using the tongue-and-groove slots as before. g. Lock the end cap bus terminator.

ATTENTION

Remove power before removing or inserting this module. When you remove or insert a module with power applied, an electrical arc may occur.

Mount the I/O bank.

Reference

Be sure to observe minimum spacing guidelines on page 3-7 for

(Installation and Wiring)

adequate ventilation.

Publication 1769-UM008A-EN-P - November 2001

2-4 Quick Start for Experienced Users

Step 4:

Wire the module.

Reference

Be sure to follow the system wiring guidelines on page 3-10. See

(Installation and Wiring)

The terminal connections are shown below:

V in 1 +

V/I in 1 -

I in 1 +

V in 3 +

V/I in 3 -

I in 3 +

ANLG Com

V out 1 +

I out 1 +

V in 0 +

V/I in 0 -

I in 0 +

V in 2 +

V/I in 2 -

I in 2 +

ANLG Com

V out 0 +

I out 0 +

D A N G E R

Do Not Remove RTB Under Power

Unless Area is Non-Hazardous.

V in 0 +

V in 1 +

V/I in 1 -

V/I in 0 -

I in 0 +

I in 1 +

V in 2 +

V in 3 +

V/I in 2 -

V/I in 3 -

I in 2+

I in 3 +

ANLG

Com

ANLG

Com

V out 0 +

V out 1 +

I out 0 +

I out 1 +

Ensure Adjacent Bus Lever is

Unlatched/Latched Before/After

Removing/Inserting Module

1769-IF4XOF2

the 1769-IF4XOF2 Wiring Diagram Showing Differential Inputs on

page 3-18 and the Wiring Single-ended Sensor/Transmitter Input

Types on page 3-19 for examples of wiring using differential and

single-ended inputs.

Publication 1769-UM008A-EN-P - November 2001

Quick Start for Experienced Users 2-5

Step 5:

Configure the module

Reference

Chapter 4

(Module Data, Status, and

Configuration Channel for

1769-IF4XOF2)

The 1769-IF4XOF2 module is configured for current or voltage operation by proper wiring of the analog I/O device to the module.

However, a channel is enabled using its configuration file.

Table 2.1 Configuration Data File

Bit Position

15 14 13 12

Not Used

(1)

11 10

Not Used

9 8 7

EI3

EI2

EI1

EO1

EI0

EO0

SGN

Channel 0 Fault Value

Channel 0 Program (Idle) Value

Channel 1 Fault Value

Channel 1 Program (Idle) Value

RSLogix 500, see Appendix B. For an example of module

(1) Any attempt to write a non-valid (1’s) bit configurations into any not used selection field results in a module configuration er ror.

(2) Not all controllers support these functions. Refer to your controller’s user manual for details.

FM0

(2)

PM0

PM1

Not

Not

The configuration file is typically modified using the programming software configuration screen. It can also be modified through the control program, if supported by the controller. See the configuration

file chart on page 4-8.

For an example of module configuration using MicroLogix 1500 and

configuration using CompactLogix and RSLogix 5000, see Appendix C.

Publication 1769-UM008A-EN-P - November 2001

2-6 Quick Start for Experienced Users

Step 6:

Step 7:

Start the system.

Reference

Chapter 5

(Module Diagnostics and

Troubleshooting) a. Apply power.

b. Download your program, which contains the analog module configuration settings, to the controller and put the controller into

Run mode.

c. During a normal start-up, the module status LED turns on.

d. If the module status LED does not turn on, cycle power. If the condition persists, replace the module.

Monitor the module status.

Reference

Chapter 6

(Module Diagnostics and

Troubleshooting)

Module and channel configuration errors are reported to the controller. These errors are typically reported in the controller’s I/O status file. Check the controller’s I/O file.

Channel status data is also reported in the module’s input data table, so these bits can be used in your control program to flag a channel

error. See Input Data File on page 4-3.

Publication 1769-UM008A-EN-P - November 2001

Chapter

Installation and Wiring

This chapter tells you about:

•

Compliance to European Union Directives on page 3-1

•

Power Requirements on page 3-2

•

General Considerations to Avoid Electrostatic Damage on page

3-2

•

System Assembly on page 3-5

•

Mounting the Module on page 3-6

•

Field Wiring Connections on page 3-10

•

Analog Input Wiring on page 3-16

•

Analog Output Wiring on page 3-21

Compliance to European

Union Directives

This product is approved for installation within the European Union and EEA regions. It has been designed and tested to meet the following directives.

EMC Directive

The analog modules are tested to meet Council Directive 89/336/EEC

Electromagnetic Compatibility (EMC) and the following standards, in whole or in part, documented in a technical construction file:

•

EN 50081-2

EMC – Generic Emission Standard, Part 2 - Industrial

Environment

•

EN 50082-2

EMC – Generic Immunity Standard, Part 2 - Industrial

Environment

This product is intended for use in an industrial environment.

Publication 1769-UM008A-EN-P - November 2001

3-2 Installation and Wiring

Power Requirements

Low Voltage Directive

This product is tested to meet Council Directive 73/23/EEC Low

Voltage, by applying the safety requirements of EN 61131-2

Programmable Controllers, Part 2 – Equipment Requirements and

Tests.

For specific information required by EN61131-2, see the appropriate sections in this publication, as well as the following Allen-Bradley publications:

•

Industrial Automation, Wiring and Grounding Guidelines for

Noise Immunity, publication 1770-4.1

•

Automation Systems Catalog, publication B113

The module receives its power through the bus interface from the +5V dc/+24V dc system power supply.

The maximum current drawn by the module is shown in the table below.

Module

1769-IF4XOF2

5V dc

120 mA

24V dc

160 mA

General Considerations to

Avoid Electrostatic Damage

Compact I/O is suitable for use in an industrial environment when installed in accordance with these instructions. Specifically, this equipment is intended for use in clean, dry environments (Pollution degree 2

(1)

) and to circuits not exceeding Over Voltage Category II

(2)

(IEC 60664-1).

(3)

Publication 1769-UM008A-EN-P - November 2001

(1) Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a temporary conductivity caused by condensation shall be expected.

(2) Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are controlled and do not exceed the impulse voltage capability of the product’s insulation.

(3) Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations.

Installation and Wiring 3-3

Hazardous Location Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B,

C, D or non-hazardous locations only. The following WARNING statement applies to use in hazardous locations.

WARNING

EXPLOSION HAZARD

•

Substitution of components may impair suitability for Class I, Division 2.

•

Do not replace components or disconnect equipment unless power has been switched off or the area is known to be non-hazardous.

•

Do not connect or disconnect components unless power has been switched off or the area is known to be non-hazardous.

•

This product must be installed in an enclosure.

•

All wiring must comply with N.E.C. article

501-4(b)

Prevent Electrostatic Discharge

ATTENTION

Electrostatic discharge can damage integrated circuits or semiconductors if you touch bus connector pins or the terminal block. Follow these guidelines when you handle the module:

•

Touch a grounded object to discharge static potential.

•

Wear an approved wrist-strap grounding device.

•

Do not touch the bus connector or connector pins.

•

Do not touch circuit components inside the module.

•

If available, use a static-safe work station.

•

When not in use, keep the module in its static-shield box.

Publication 1769-UM008A-EN-P - November 2001

3-4 Installation and Wiring

Remove Power

ATTENTION

Remove power before removing or inserting this module. When you remove or insert a module with power applied, an electrical arc may occur. An electrical arc can cause personal injury or property damage by:

• sending an erroneous signal to your system’s field devices, causing unintended machine motion

• causing an explosion in a hazardous environment

Electrical arcing causes excessive wear to contacts on both the module and its mating connector. Worn contacts may create electrical resistance.

Reducing Electrical Noise Interference

Most applications require installation in an industrial enclosure to reduce the effects of electrical interference. Analog inputs and outputs are highly susceptible to electrical noise. Electrical noise coupled to the analog inputs will reduce the performance (accuracy) of the module.

Group your modules to minimize adverse effects from radiated electrical noise and heat. Consider the following conditions when selecting a location for the analog module. Position the module:

• away from sources of electrical noise such as hard-contact switches, relays, and AC motor drives

• away from modules which generate significant radiated heat, such as the 1769-IA16. Refer to the module’s heat dissipation specification.

In addition, route shielded, twisted-pair analog input and output wiring away from any high voltage I/O wiring.

Publication 1769-UM008A-EN-P - November 2001

System Assembly

Installation and Wiring 3-5

Protecting the Circuit Board from Contamination

The printed circuit boards of the analog modules must be protected from dirt, oil, moisture, and other airborne contaminants. To protect these boards, the system must be installed in an enclosure suitable for the environment. The interior of the enclosure should be kept clean and the enclosure door should be kept closed whenever possible.

The module can be attached to the controller or an adjacent I/O module or power supply before or after mounting. For mounting

instructions, see Panel Mounting Using the Dimensional Template on

page 3-7, or DIN Rail Mounting on page 3-8. To work with a system

that is already mounted, see Replacing a Single Module within a

System on page 3-9.

The following procedure shows you how to assemble the Compact

I/O system.

1. Disconnect power.

2. Check that the bus lever of the module to be installed is in the unlocked (fully right) position.

3. Use the upper and lower tongue-and-groove slots (A) to secure the modules together (or to a controller or power supply).

4. Move the module back along the tongue-and-groove slots until the bus connectors (B) line up with each other.

5. Push the bus lever back slightly to clear the positioning tab (C).

Use your fingers or a small screwdriver.

Publication 1769-UM008A-EN-P - November 2001

3-6 Installation and Wiring

6. To allow communication between the controller and module, move the bus lever fully to the left (D) until it clicks. Ensure it is locked firmly in place.

ATTENTION

When attaching I/O modules, it is very important that the bus connectors are securely locked together to ensure proper electrical connection.

7. Attach an end cap terminator (E) to the last module in the system by using the tongue-and-groove slots as before.

8. Lock the end cap bus terminator (F).

IMPORTANT

A 1769-ECR or 1769-ECL right or left end cap must be used to terminate the end of the communication bus.

Mounting the Module

ATTENTION

During panel or DIN rail mounting of all devices, be sure that all debris (metal chips, wire strands, etc.) is kept from falling into the module. Debris that falls into the module could cause damage on power up.

Publication 1769-UM008A-EN-P - November 2001

Installation and Wiring 3-7

Minimum Spacing

Maintain spacing from enclosure walls, wireways, adjacent equipment, etc. Allow 50 mm (2 in.) of space on all sides for adequate ventilation, as shown below:

Top

Side Side

Host Controller

Bottom

Panel Mounting

Mount the module to a panel using two screws per module. Use M4 or #8 panhead screws. Mounting screws are required on every module.

Panel Mounting Using the Dimensional Template

For more than 2 modules: (number of modules-1) X 35 mm (1.38 in.).

Refer to host controller documentation for this dimension.

NOTE: All dimensions are in mm (inches).

Hole spacing tolerance: ±0.04 mm (0.016 in.).

132

(5.197)

122.6±0.2

(4.826±0.008)

(1.38)

28.5

(1.12)

Publication 1769-UM008A-EN-P - November 2001

3-8 Installation and Wiring

Panel Mounting Procedure Using Modules as a Template

The following procedure allows you to use the assembled modules as a template for drilling holes in the panel. Due to module mounting hole tolerance, it is important to follow these procedures:

1. On a clean work surface, assemble no more than three modules.

2. Using the assembled modules as a template, carefully mark the center of all module-mounting holes on the panel.

3. Return the assembled modules to the clean work surface, including any previously mounted modules.

4. Drill and tap the mounting holes for the recommended M4 or #8 screw.

5. Place the modules back on the panel, and check for proper hole alignment.

6. Attach the modules to the panel using the mounting screws.

TIP

If mounting more modules, mount only the last one of this group and put the others aside.

This reduces remounting time during drilling and tapping of the next group.

7. Repeat steps 1 to 6 for any remaining modules.

DIN Rail Mounting

The module can be mounted using the following DIN rails:

35 x 7.5 mm (EN 50 022 - 35 x 7.5) or 35 x 15 mm (EN 50 022 - 35 x

15).

Before mounting the module on a DIN rail, close the DIN rail latches.

Press the DIN rail mounting area of the module against the DIN rail.

The latches will momentarily open and lock into place.

Publication 1769-UM008A-EN-P - November 2001

Installation and Wiring 3-9

Replacing a Single Module within a System

The module can be replaced while the system is mounted to a panel

(or DIN rail). Follow these steps in order:

1. Remove power. See attention note on 3-4.

2. On the module to be removed, remove the upper and lower mounting screws from the module (or open the DIN latches using a flat-blade or phillips-style screwdriver).

3. Move the bus lever to the right to disconnect (unlock) the bus.

4. On the right-side adjacent module, move its bus lever to the right (unlock) to disconnect it from the module to be removed.

5. Gently slide the disconnected module forward. If you feel excessive resistance, check that the module has been disconnected from the bus, and that both mounting screws have been removed (or DIN latches opened).

TIP

It may be necessary to rock the module slightly from front to back to remove it, or, in a panel-mounted system, to loosen the screws of adjacent modules.

6. Before installing the replacement module, be sure that the bus lever on the module to be installed and on the right-side adjacent module are in the unlocked (fully right) position.

7. Slide the replacement module into the open slot.

8. Connect the modules together by locking (fully left) the bus levers on the replacement module and the right-side adjacent module.

9. Replace the mounting screws (or snap the module onto the DIN rail).

Publication 1769-UM008A-EN-P - November 2001

3-10 Installation and Wiring

Field Wiring Connections

Grounding

This product is intended to be mounted to a well-grounded mounting surface such as a metal panel. Additional grounding connections from the module’s mounting tabs or DIN rail (if used) are not required unless the mounting surface cannot be grounded. Refer to Industrial

Automation Wiring and Grounding Guidelines, Allen-Bradley publication 1770-4.1, for additional information.

System Wiring Guidelines

Consider the following when wiring your system:

General

•

All module commons (ANLG COM) are connected in the analog module. The analog common (ANLG COM) is not connected to earth ground inside the module.

•

Channels are not isolated from each other.

•

Use Belden™ 8761, or equivalent, shielded wire.

•

Under normal conditions, the drain wire and shield junction must be connected to earth ground via a panel or DIN rail mounting screw at the analog I/O module end. Keep the shield connection to ground as short as possible.

(1)

•

To ensure optimum accuracy, limit overall cable impedance by keeping your cable as short as possible. Locate the I/O system as close to your sensors or actuators as your application will permit.

(2)

Inputs

•

If multiple power supplies are used with analog inputs, the power supply commons must be connected.

•

The module does not provide loop power for analog inputs. Use a power supply that matches the input transmitter specifications.

•

Differential analog inputs are more immune to noise than single-ended analog inputs.

•

Voltages on Vin+, V/Iin-, and Iin+ of the module must be within

0 to +10V dc of analog common.

Publication 1769-UM008A-EN-P - November 2001

(1) In environments where high-frequency noise may be present, it may be necessary to directly ground cable shields to earth at the module end and via a 0.1µF capacitor at the sensor end.

(2) Cable length over 50 meters may impact accuracy., For details, refer to the

Compact Combination Analog I/O Module, publication 1769-UM008A-EN-P.

Installation and Wiring 3-11

Outputs

•

Voltage outputs (Vout 0+ and Vout 1+) of the module are referenced to ANLG COM. Load resistance for a voltage output channel must be equal to or greater than 1K

Ω

•

Current outputs (Iout 0+ and Iout 1+) of the module source current that returns to ANLG COM. Load resistance for a current output channel must remain between 0 and 300

Ω

ATTENTION

Be careful when stripping wires. Wire fragments that fall into a module could cause damage at power up. Once wiring is complete, ensure the module is free of all metal fragments.

Effect of Transducer/Sensor and Cable Length Impedance on Voltage Input

Accuracy

For voltage inputs, the length of the cable used between the transducer/sensor and the module can affect the accuracy of the data provided by the module.

Rs Rc

V in

Where:

Rc = DC resistance of the cable (each conductor) depending on

cable length

Rs = Source impedance of analog transducer/sensor input

Ri = Impedance of the voltage input (150 K

Ω

)

Vs = Voltage source (voltage at the transducer/sensor input

device)

Vin = Measured potential at the module input

%Ai = Percent added inaccuracy in a voltage-based system due

to source and cable impedance.

Vin

[

(

)

]

Publication 1769-UM008A-EN-P - November 2001

3-12 Installation and Wiring

For example, for Belden 8761 two conductor, shielded cable:

Rc = 16

Ω

/1000 ft

Rs = 0 (ideal source)

Table 3.1 Effect of Cable Length on Input Accuracy

Length of Cable (m)

100

200

300

dc resistance of the

2.625

5.25

10.50

15.75

cable, Rc (

Ω

)

Accuracy impact at the input module

0.00350%

0.00700%

0.01400%

0.02100%

Ai = 1

–

Vin



100

As input source impedance (Rs) and/or resistance (dc) of the cable

(Rc) get larger, system accuracy decreases. If you determine that the inaccuracy error is significant, implementing the following equation in the control program can compensate for the added inaccuracy error due to the impedance of the source and cable.

Vs = Vin

[

Rs +

(

2 Rc

)

+ Ri

]

TIP

In a current loop system, source and cable impedance do not impact system accuracy.

Publication 1769-UM008A-EN-P - November 2001

Installation and Wiring 3-13

Effect of Device and Cable Output Impedance on Output Accuracy

The maximum value of the output impedance is shown in the example below, because it creates the largest deviation from an ideal voltage source.

Rs Rc

V in

Where:

Rc = DC resistance of the cable (each conductor)

depending on cable length

Rs = Source impedance of the 1769-IF4XOF2 output (10

Ω

)

Ri = Impedance of the voltage input (150 K

Ω for the voltage input channel of the 1769-IF4XOF2)

Vs = Voltage at the output

Vin = Measured potential at the module input

%Ai = Percent added inaccuracy in a voltage-based

system due to source and cable impedance.

Vin =

[

Rs +

[

(

)

]

+ Ri

]

For example, for Belden 8761 two conductor, shielded cable and an input channel:

Rc = 16

Ω

/1000 ft

Rs = 10

Ω

Ri = 150 K

Ω

Ai = 1

–

Vin



100

Table 3.2 Effect of Output Impedance and Cable Length on Accuracy

Length of Cable (m)

100

200

300

dc resistance of the cable

Rc (

Ω

2.625

5.25

10.50

15.75

)

Accuracy impact at the input module

0.01017%

0.01366%

0.02066%

0.02766%

Publication 1769-UM008A-EN-P - November 2001

3-14 Installation and Wiring

As output impedance (Rs) and/or resistance (dc) of the cable (Rc) get larger, system accuracy decreases. If you determine that the inaccuracy error is significant, implementing the following equation in the control program can compensate for the added inaccuracy error due to the impedance of the output module and cable.

Vs = Vin

[

(

)

]

TIP

In a current loop system, source and cable impedance do not impact system accuracy.

Removing the Finger-Safe Terminal Block

When wiring field devices to the module, it is not necessary to remove the terminal block. If you remove the terminal block, use the write-on label on the side of the terminal block to identify the module slot location and type.

SLOT # _____

MODULE TYPE ______

Publication 1769-UM008A-EN-P - November 2001

Installation and Wiring 3-15

To remove the terminal block, loosen the upper and lower retaining screws. The terminal block will back away from the module as you remove the screws. When replacing the terminal block, torque the retaining screws to 0.46 Nm (4.1 in-lbs).

upper retaining screw wiring the finger-safe terminal block lower retaining screw

Wiring the Finger-Safe Terminal Block

When wiring the terminal block, keep the finger-safe cover in place.

1. Loosen the terminal screws to be wired.

2. Route the wire under the terminal pressure plate. You can use the bare wire or a spade lug. The terminals will accept a 6.35 mm (0.25 in.) spade lug.

TIP

The terminal screws are non-captive.

Therefore, it is possible to use a ring lug

[maximum 1/4 inch o.d. with a 0.139 inch minimum i.d. (M3.5)] with the module.

3. Tighten the terminal screw making sure the pressure plate secures the wire. Recommended torque when tightening terminal screws is 0.68 Nm (6 in-lbs).

TIP

If you need to remove the finger-safe cover, insert a screw driver into one of the square wiring holes and gently pry the cover off. If you wire the terminal block with the finger-safe cover removed, you will not be able to put it back on the terminal block because the wires will be in the way.

Publication 1769-UM008A-EN-P - November 2001

3-16 Installation and Wiring

Solid

Stranded

Wire Type

Cu-90°C (194°F)

Analog Input Wiring

Wire Size and Terminal Screw Torque

Each terminal accepts up to two wires with the following restrictions:

Wire Size

#14 to #22 AWG

#16 to #22 AWG

Terminal Screw Torque

0.68 Nm (6 in-lbs)

Retaining Screw Torque

0.46 Nm (4.1 in-lbs)

ATTENTION

To prevent shock hazard, care should be taken when wiring the module to analog signal sources. Before wiring any analog module, disconnect power from the system power supply and from any other source to the analog module.

After the analog module is properly installed, follow the wiring procedure below. To ensure proper operation and high immunity to electrical noise, always use Belden™ 8761 (shielded, twisted-pair) or equivalent wire.

ATTENTION

When wiring an analog input, take care to avoid connecting a voltage source to a channel configured for current input. Improper module operation or damage to the voltage source can occur.

Never connect a voltage or current source to an analog output channel.

Publication 1769-UM008A-EN-P - November 2001 cable

Cut foil shield and drain wire signal wire signal wire drain wire foil shield signal wire signal wire

To wire your module follow these steps.

1. At each end of the cable, strip some casing to expose the individual wires.

2. Trim the signal wires to 2-inch lengths. Strip about 3/16 inch (5 mm) of insulation away to expose the end of the wire.

Installation and Wiring 3-17

ATTENTION

Be careful when stripping wires. Wire fragments that fall into a module could cause damage at power up.

3. At one end of the cable, twist the drain wire and foil shield together.

Under normal conditions, this drain wire and shield junction must be connected to earth ground, via a panel or DIN rail mounting screw at the analog I/O module end. Keep the length of the drain wire as short as possible.

In environments where high frequency noise may be present, the cable shields should be grounded via a 0.1 µF capacitor at the end using the data. In other words, for analog inputs, the cable shield should be grounded via the 0.1 µF capacitor at the analog module end. For analog outputs, the cable shield should be grounded via a 0.1 µF capacitor at the load end.

4. At the other end of the cable, cut the drain wire and foil shield back to the cable.

5. Connect the signal wires to the terminal block as shown in

Analog Input Wiring on page 3-16 and Analog Output Wiring on page 3-21. Connect the other end of the cable to the analog

input or output device.

6. Repeat steps 1 through 5 for each channel on the module.

Publication 1769-UM008A-EN-P - November 2001

3-18 Installation and Wiring

Publication 1769-UM008A-EN-P - November 2001

Terminal Door Label

A removable, write-on label is provided with the module. Remove the label from the door, mark the identification of each terminal with permanent ink, and slide the label back into the door. Your markings

(ID tag) will be visible when the module door is closed.

V in 1 +

V/I in 1 -

I in 1 +

V in 3 +

V/I in 3 -

I in 3 +

ANLG Com

V out 1 +

I out 1 +

V in 0 +

V/I in 0 -

I in 0 +

V in 2 +

V/I in 2 -

I in 2 +

ANLG Com

V out 0 +

I out 0 +

D A N G E R

Do Not Remove RTB Under Power

Unless Area is Non-Hazardous.

V in 0 +

V in 1 +

V/I in 1 -

V/I in 0 -

I in 0 +

I in 1 +

V in 2 +

V in 3 +

V/I in 2 -

V/I in 3 -

I in 2+

I in 3 +

ANLG

Com

ANLG

Com

V out 0 +

V out 1 +

I out 0 +

I out 1 +

Ensure Adjacent Bus Lever is

Unlatched/Latched Before/After

Removing/Inserting Module

1769-IF4XOF2

Wiring Diagram Showing Differential Inputs

V in 1+

V/I in 1 -

I in 1+

V in 3+

V/I in 3 -

I in 3+

ANLG Com

V out 1+

I out 1+

V in 0+

V/I in 0-

I in 0+

V in 2 +

V/I in 2-

I in 2+

ANLG Com

V out 0+

I out 0+

1769-IF4XOF2 Terminal Block

+

–

earth ground the shield locally at

the module differential voltage transmitter

Belden 8761 cable (or equivalent)

(1) All analog commons (ANLG Com) are internally connected.

(2) If multiple power supplies are used, the commons must have the same ground reference.

(3) User Belden 8761 cable (or equivalent) for wiring analog I/O.

Wiring Single-ended Sensor/Transmitter Input Types

Installation and Wiring 3-19

1769-IF4XOF2 Terminal Block

Sensor/

Transmitter

Power

Supply

(1)

Current

Transmitter

Signal

Voltage Transmitter

Ground Signal

(1) The sensor power supply must be rated Class 2.

(2) All analog commons (ANLG Com) are internally connected.

(3) If multiple power supplies are used, the commons must have the same ground reference.

(4) User Belden 8761 cable (or equivalent) for wiring analog I/O.

V/I in 2-

V in 3+

I in 3+

V/I in 3-

ANLG Com

V out 0+

I out 0+

V out 1+

I out 1 +

V in 0+

I in 0+

V/I in 0 -

V in 1+

I in 1+

V/I in 1-

V in 2+

I in 2+

Publication 1769-UM008A-EN-P - November 2001

3-20 Installation and Wiring

Wiring Mixed Transmitter Input Types

Single-ended

Voltage

–

Transmitter

Signal

–

Differential

Voltage

Transmitter

Supply

–

Signal

–

Signal

–

Differential

Current

Transmitter

Supply

2-Wire

Current

Transmitter

Signal

Sensor/

Transmitter

Power Supply

(1)

–

1769-IF4XOF2 Terminal Block

V in 0+

I in 0+

V/I in 0 -

V in 1+

I in 1+

V/I in 1-

V in 2+

I in 2+

V/I in 2-

V in 3+

I in 3+

V/I in 3-

ANLG Com

V out 0+

I out 0+

V out 1+

I out 1 +

(1) The sensor power supply must be rated Class 2.

(2) All analog commons (ANLG Com) are internally connected.

(3) If multiple power supplies are used, the commons must have the same ground reference.

(4) User Belden 8761 cable (or equivalent) for wiring analog I/O.

Publication 1769-UM008A-EN-P - November 2001

Installation and Wiring 3-21

Analog Output Wiring

ATTENTION

Voltage Load

Current Load

Earth Ground

V in 0+

I in 0+

V/I in 0 -

V in 1+

I in 1+

V/I in 1-

V in 2+

I in 2+

V/I in 2-

V in 3+

I in 3+

V/I in 3-

ANLG Com (1)

ANLG Com

(1)

V out 0+

I out 0+

V out 1+

I out 1 +

Earth Ground

(1) All analog common terminals (ANLG Com) are internally connected in the module.

Publication 1769-UM008A-EN-P - November 2001

3-22 Installation and Wiring

Publication 1769-UM008A-EN-P - November 2001

Chapter

1769-IF4XOF2 Module Data, Status, and

Configuration Channels

Module Addressing

slot e

Input Image File slot e

Configuration

File slot e

Output Image

File

This chapter examines the 1769-IF4XOF2 module’s data table, channel status, and channel configuration word:

•

Module Addressing on page 4-1

•

Input Data File on page 4-3

•

Output Data File on page 4-7

•

Configuration Data File on page 4-8

The following memory map shows the input, output, and configuration image tables. Detailed information on the input image

table can be found in Input Image on page 4-3.

Input Image

8 words

Configuration File

6 words

Output Image

2 words

Memory Map

Channel 0 Input Word

Channel 1 Input Word

Channel 2 Input Word

Channel 3 Input Word

Over-range Bits - Inputs

Over-range Bits - Outputs

Channel 0 Output Loopback

Channel 1 Output Loopback

Word 0

Word 1

Word 2

Word 3

Word 4

Word 5

Word 6, bits 7 to 14

Word 7, bits 7 to 14

Configuration Word

Output Channel 0 Fault Value

Output Channel 0 Program (Idle) Value

Output Channel 1 Fault Value

Output Channel 1 Program (Idle) Value

Word 0

Word 1

Word 2

Word 3

Word 4

Word 5

Bit 15

Channel 0 Output Data Word

Channel 1 Output Data Word

Bit 0

Word 0

Word 1

Publication 1769-UM008A-EN-P - November 2001

4-2 1769-IF4XOF2 Module Data, Status, and Configuration Channels

Input/Output/Configuration Data Registers

Data registers are available for input, output, and configuration. There are eight input data registers, six configuration registers, and two output data registers. The module and programming software applies the following default values to the registers:

I:5

I:6

I:7

O:0

O:1

I:0

I:1

I:2

I:3

I:4

Table 4.1 Data Registers

Register

C:0

C:1

C:2

C:3

C:4

C:5

Function

Configuration Word 1

Configuration Word 2

Configuration - Channel 0

Fault Value

Configuration - Channel 0

Program Value

Configuration - Channel 1

Fault Value

Default at

Power-Up

0000h

Configuration - Channel 1

Program Value

Channel 0 Input Word

Channel 1 Input Word

Channel 2 Input Word

Channel 3 Input Word

Input Channel Over-range

0000h

Output Channel Over-range 0000h

Channel 0 Output Data Echo 0000h

Channel 1 Output Data Echo 0000h

Channel 0 Output Word

Channel 1 Output Word

0000h

Programming Software

Default Down Load

0000h

Publication 1769-UM008A-EN-P - November 2001

1769-IF4XOF2 Module Data, Status, and Configuration Channels 4-3

Input Data File

The input data file provides access to analog input data for use in the control program. Input data resolution is 8 bits with the least significant 7 bits (0 to 6) permanently set to zero (0) by the module. In addition, over-range indication for the input and output channels, and output data feedback is provided as described below.

Table 4.2 Input Data File

SGN

Not

Used

SGN

13 12 11 10 9

Analog Input Data Value Channel 0

Analog Input Data Value Channel 1

Analog Input Data Value Channel 2

Bit Position

8 7

Not

Used

Analog Input Data Value Channel 3

Not Used

(1)

Not Used

the input array. See Input Data File on page 4-3 for more information.

Output Data Echo/Loopback for Output Channel 0

Output Data Echo/Loopback for Output Channel 1

(1) All unused bits are set to 0 by the module.

Input Image

The input image file represents input channel data words I/O, and I/O channel status bits. Input words 0 through 3 contain the converted analog input data from the field device. Word 4, bit 1,2 and 3 are the over-range flag bits for input channels 0 to 3. Word 5, bit 0 and 1 are the over-range flag bits for output channels 0 and 1. Words 6 and 7, bits 7 through 14 are the data echo. These words provide output channel loopback/data echo from output channels 0 and 1 through

TIP

You can access information in the input image file using the programming software configuration screen.

Publication 1769-UM008A-EN-P - November 2001

4-4 1769-IF4XOF2 Module Data, Status, and Configuration Channels

SGN

Input Data Words 0 through 3

All bits shown as 0 (bits 0 through 6) are always set to 0. Bits 7 through 14 contain the 8 input data bits. The table below illustrates the format of the input data, words 0 to 3.

Input Data Words 4 through 7

These words contain diagnostic and control information. For details

see Bit Definitions for Input Data below.

Bit Definitions for Input Data

Sign Bit (SGN)

The sign bit is always positive (equal to zero).

Over Input Range Flag Bits (I0 to I3)

Word 4, bits 0 to 3 (i0 to I3) contain over-range flag bits for input channels 0 through 3 respectively. These bits can be used in the control program for error detection. When set to 1, the bits signal that the input signal is outside the normal operating range. However, the module continues to convert analog data to the maximum full-range value. When the over-range condition is cleared, the bits automatically reset to (0).

Over Output Range Flag Bits (O0 and O1)

Word 5, bits 0 and 1 (O0 and O1) provide over-range indication for output channels 0 and 1. These bits can be used in the control program for error detection. When set to 1, the bits signal that the output signal is outside the normal operating range. However, the module continues to convert analog data to the maximum full-range value. When the over-range condition is cleared, the bits automatically reset to 0.

TIP

Under-range indication is not provided for the

1769-IF4OXF2 because zero is a valid number.

Refer to Table 4.9 Valid Input Data on page 4-14 to

view the normal operating and over-range areas.

Publication 1769-UM008A-EN-P - November 2001

1769-IF4XOF2 Module Data, Status, and Configuration Channels 4-5

Invalid Data Set (Ex)

Word 5, bits 2 and 3 provide invalid output data indication for output channels 0 and 1, respectively. When either invalid output data bit is set to 1, it indicates that invalid output data has been sent by the controller to that channel of the module. When this occurs, the module sets the appropriate (Ex) flag and continues to operate with the previously accepted data.

NOTE: Invalid data is a value outside the standard range or increment.

For example, 128, 256, etc. or by writing to bits 0 though 6 and bit 15.

Hold Last State (Hx)

Word 5, bits 12 and 14, indicates that the channel is in a hold last state condition when set to 1.

IMPORTANT

Not all controllers support Hold Last State functionality. Refer to your controller’s user manual.

Analog Output Loopback/Data Echo

Input words 6 and 7, bits 7-14, reflect the analog output data echo of the analog value being converted by the digital/analog converter, not necessarily the electrical state of the output terminals. They do not reflect shorted or open outputs.

IMPORTANT

Input words 6 and 7 contain the Output Data

Echo/Loopback information for output channels 0 and 1 respectively. Bits 0 through 6 and Bit 15 of words 6 and 7 should always be set to zero in your control program, or the module will set the Invalid

Data Set (Ex) flag.

IMPORTANT

It is only important to use the loopback function of input words 6 and 7 if the controller supports the

Program Mode or Fault Mode functions, and if it is configured to use them.

Publication 1769-UM008A-EN-P - November 2001

4-6 1769-IF4XOF2 Module Data, Status, and Configuration Channels

Input Data Resolution and Format

Table 4.3 Input Data Resolution and Format

Full Input Range

0V to 10.5V dc

0 mA to 21 mA

Significant Bits

Sign + 8 bits

The following table identifies the current and voltage input ranges for the 1769-IF4XOF2 module, and the number of significant bits provided by the module with its single (non-programmable) filter. The number of significant bits indicated in the table has little or no jitter due to noise. The module’s RAW/Proportional data format presents the value to the controller via a left justified 16-bit field, with the most significant bit for the sign bit (which is always zero).

Resolution per LSB

41.18mV

82.35mA

RAW/Proportional Data

Decimal Representation of Input

0 to 32640

Count Value

128 (1LSB)

Input Scaling

Example 1: Find voltage by converting raw/proportional data values

To convert a raw/proportional data value to find the voltage being measured:

Voltage = (Input Data Value X volts/significant bit) /

(counts/significant bit)

If input data value is 32,640

Voltage = (32640 X 0.04118V) / 128

= 10.50 Volts

Example 2: Find current by converting raw/proportional data values

To convert a raw/proportional data value to find the current being measured:

Current = (Input Data Value X amps/significant bit) /

(counts/significant bit)

If the input data value is 31,104

Current = (31,104 X 0.08235A) /128

= 20 mA

Publication 1769-UM008A-EN-P - November 2001

1769-IF4XOF2 Module Data, Status, and Configuration Channels 4-7

Output Data File

The output file contains the module’s analog output data information.

Word 0 and 1, bits 7 through 14 contain the output data bits for channels 0 and 1.

The output data file applies only to output data from the module as shown in the table below.

Table 4.4 Output Data File

SGN

14 13 12 11 10 9

Analog Output Data Channel 0

Analog Output Data Channel 1

Bit Position

8 7 6

SGN

Output Data Words 0 and 1

The SGN bit of Words 0 and 1 is always zero (0). The following table illustrates the format of the output data.

IMPORTANT

Bits 0 through 6 and Bit 15 of output data words 0 and 1 should always be set to zero in your control program. If they are not set to 0, the invalid data flag

(Ex) will be set for that channel. However the channel will continue to operate with the previously converted value. If a MVM (Move with Mask) instruction is used with a mask of 7F80 (hexidecimal) to move data to the output words, writing to bits 0 through 6 and bit 15 can be avoided.

Publication 1769-UM008A-EN-P - November 2001

4-8 1769-IF4XOF2 Module Data, Status, and Configuration Channels

Output Data Resolution and Format

Table 4.5 Output Resolution

Full Output Range

Significant Bits

0V to 10.5 V dc

0 mA to 21 mA

Sign + 8 bits

The resolution of an analog output channel depends on the output type/range and data format selected. The following table provides detailed resolution information for the module.

RAW/Proportional Data

Resolution per LSB Decimal

Representation of

Output

41.18mV

0 to 32640

82.35mA

0 to 32640

Count Value

128 (1LSB)

Configuration Data File

The configuration file allows you to enable or disable an input or output channel. It also allows you to configure the operation of the outputs during a mode change to Program or a Fault condition.

Word 0 bits 4, 5, 6 and 7 allow the individual input channels to be enabled or disabled. Word 1 bits 4 and 5 allow the individual output channels to be enabled or disabled.

TIP

Not all controllers support program access to the configuration file. Refer to your controller’s user manual.

Publication 1769-UM008A-EN-P - November 2001

1769-IF4XOF2 Module Data, Status, and Configuration Channels 4-9

The manipulation of the bits from this file is normally done with programming software (e.g. RSLogix 500, RSLogix 5000, RSNetworx for DeviceNet, etc.) during initial configuration of the system. In that case, graphical screens are typically provided by the programmer to simplify configuration. However, some systems, like the 1769-ADN

DeviceNet Adapter, also allow the bits to be altered as part of the control program, using communication rungs. In that case, it may be beneficial to understand the bit arrangement.

Table 4.6 Configuration Data File

15 14 13 12

Not Used

(1)

11 10

Not Used

9 8

Bit Position

EI3

EI2

EI1

EO1

EI0

EO0

FM0

(2)

PM0

FM1

PM1

SGN

Channel 0 Fault Value

Channel 0 Program (Idle) Value

Channel 1 Fault Value

Channel 1 Program (Idle) Value

(1) Any attempt to write a non-valid (1’s) bit configurations into any not used selection field results in a module configuration er ror.

(2) Not all controllers support these functions. Refer to your controller’s user manual for details.

Not

Used

Not

Used

Bit Definitions for Configuration Data

Sign Bit (SGN)

The sign bit is always positive (Bit 15 = zero).

Enable/Disable Input Channel (EIx)

Word 0 bits 4 to 7 (EI0 to EI3) are defined as the input channel enable/disable bits. These bits allow individual input channels 0 through 3 to be enabled (on) or disabled (off). When a channel is not enabled, the module provides no current or voltage input to the host controller.

Publication 1769-UM008A-EN-P - November 2001

4-10 1769-IF4XOF2 Module Data, Status, and Configuration Channels

Enable/Disable Output Channel (EOx)

Word 1 bits 4 and 5 (EO0 and EO1) are defined as the output channel enable/disable bits. EOx bits allow individual output channels 0 and 1 to be enabled or disabled. When a channel is not enabled, the module does not produce current or voltage.

TIP

To improve performance and speed, disable unused channels.

Publication 1769-UM008A-EN-P - November 2001

Program/Idle Mode Selection Channel 0 and 1 (PM0 and PM1)

These bits provide Program (Idle) Mode selection for analog output channels 0 (Word 0 Bit 2) and 1 (Word 1 Bit 2).

•

Hold Last State (0) – When reset (to 0), this bit directs the module to hold the analog output at the last converted value when the module transitions from Run to Program Mode. This is the default channel condition.

IMPORTANT

Hold last state is the default condition for the module during a control system run-to-program mode change.

TIP

MicroLogix 1500™ does not support the analog output module’s default hold last state function and resets analog outputs to zero when the system enters the program mode.

•

User-Defined Safe State (1) – When this bit is set (to 1) and the module transitions to Program mode, the module converts the user-specified integer value from the Channel x Program Value

Word (3 or 5) to the appropriate analog output.

Fault Mode Selection Channel 0 and 1 (FM0 and FM1)

FM0 and FM1 bits provide Fault Mode selection for analog output channels 0 (Word 0 Bit 3) and 1 (Word 1 Bit 3). When this selection is disabled [the bit is reset (0)] and the system transitions from Run to

Fault mode, the module holds the last output state value. This means

1769-IF4XOF2 Module Data, Status, and Configuration Channels 4-11 that the analog output remains at the last converted value prior to the condition that caused the system to enter the fault mode.

IMPORTANT

Hold last state is the default condition for the module during a control system run-to-fault mode change.

TIP

MicroLogix 1500 does not support the analog output module’s default hold last state function and resets analog outputs to zero when the system enters the fault mode.

•

Hold Last State (0) – When reset, this bit directs the module to hold the analog output at the last converted value when the module transitions to Fault Mode. This is the default condition.

•

User-Defined Safe State (1) – When this bit is set and the module transitions to Fault mode, the module converts the user-specified integer value from the Channel x Fault Value Word (2 or 4) to the appropriate analog output for the configured range as wired.

If the default value, 0000, is entered, the output converts to the minimum value for the range selected.

TIP

Not all controllers support this function. Refer to your controller’s user manual for details.

Program to Fault Enable Selection (PFE0 and PFE1)

The Program to Fault Enable bit determines which data value,

Program (PFEx = 0) or Fault (PFEx = 1), is applied to the output if the module undergoes a fault condition while in the Program Mode, resulting in a change to Fault Mode. Word 0 Bit 0 applies to channel 0, while Word 1 Bit 0 applies to channel 1.

•

Program Value (Channel 0 and 1) – Words 3 and 5 allow you to enter the integer values that output Channel 0 (Word 3) and output Channel 1 (Word 5) should assume when the system transitions to the Program mode. The value must be in increments of 128 (0, 128, 256, etc.) for proper operation. If the value entered is outside the acceptable increment or range, the module generates a configuration error for that channel. The module default value is zero.

Publication 1769-UM008A-EN-P - November 2001

4-12 1769-IF4XOF2 Module Data, Status, and Configuration Channels

•

Fault Value (Channel 0 and 1) – Words 2 and 4 allow you to enter the integer values that output Channel 0 (Word 2) and output Channel 1 (Word 4) should assume when the system transitions to the Fault mode. The value must be in increments of 128 (0, 128, 256, etc.) for proper operation. If the value entered is outside the acceptable increment or range, the module generates a configuration error for that channel. The module default value is zero.

IMPORTANT

PMx, FMx, PFEx, Channel x Program (Idle) Value, and Channel x Fault Value functions are not supported by all controllers. Refer to your controller’s user manual for details.

Input Filter Selection

The 1769-IF4XOF2 has a fixed input filter. No configuration is required.

Channel Step Response

The module’s fixed filter frequency determines the channel’s step response. The step response is the time required for the analog input signal to reach 63% or 90% of its expected final value. This means that if an input signal changes faster than the channel step response, a portion of that signal will be attenuated by the channel filter.

Table 4.7 Filter Frequency and Step Response

Fixed Filter Frequency Filter Cut-Off Frequency

2.7 kHz

Step Response

% Complete

63%

90%

Step Response

Time

59 us

136 us (Nominal)

Channel Cut-Off Frequency

The -3 dB frequency is the filter cut-off frequency. The cut-off frequency is defined as the point on the input channel frequency response curve where the frequency components of the input signal are passed with 3 dB of attenuation. All input frequency components at or below the cut-off frequency are passed by the digital filter with less than 3 dB of attenuation. All frequency components above the cut-off frequency are increasingly attenuated.

Publication 1769-UM008A-EN-P - November 2001

Input Signal

Input After Filter

A/D Conversion (4 CH)

MPU/ASIC Input Data

Communication

MPU/ASIC Output Data

Communication

Output D/A Conversion

1769-IF4XOF2 Module Data, Status, and Configuration Channels 4-13

Module Input Update Time and Scanning Process

The module input update time is defined as the time required for the module to sample and convert the input signals of all 4 enabled input channels and provide the resulting data values to the processor.

Maximum Input Response Time of Module (5 ms)

Minimum Input Response

Time of Module (5 ms)

Input Update Time (4.5 ms)

Module update time can be calculated by adding the sum of all enabled channel times. Channel times include channel scan time, channel switching time, and reconfiguration time. The module sequentially samples the channels in a continuous loop. The table below shows module update times, based on the number of input channels enabled.

Table 4.8 Module Update Time

Number of Enabled Input Channels

Typical Update Time

(1)

1.3 ms

2.1 ms

2.9 ms

3.7 ms

4.5 ms

(1) Each enabled output channel adds 0.02 ms to the typical module update time.

Publication 1769-UM008A-EN-P - November 2001

4-14 1769-IF4XOF2 Module Data, Status, and Configuration Channels

Analog Range Selection

The analog input range selection is accomplished by proper wiring of the input channels.

Valid Input Data Word Formats/Ranges

The analog input data received at the module is converted to

RAW/proportional data format. Unlike the 1769-IF4 and 1769OF2. on-board scaling is not provided by the module. You must do this via your control program.

The following table shows the valid input data format for the data range provided by the module.

Table 4.9 Valid Input Data

Input Range

0 to +10V dc

0 to 20 mA

Input Value

Over 10.5V dc

+10.5V dc

0.0V dc to

+10.0V dc

Over 21.0 mA

21.0 mA

0.0 mA to 20.0 mA

Example Data

+11.0V dc

+ 10.5V dc

+10.0V dc

5.0V dc

0.0V dc

+22.0 mA

+21.0 mA

+20.0 mA

+10.0 mA

0.0 mA

Input Range

Condition

Over-range

(1)

Over-range

Normal

Over-range

Over-range

Normal

Raw/Proportional Data

Decimal Range

32640

31104

15488

32640

31104

15488

(1) The module’s maximum range is 10.5V or 21 mA. An over-range flag is set at either value. This flag automatically resets when the input data is below the over-range value.

Publication 1769-UM008A-EN-P - November 2001

1769-IF4XOF2 Module Data, Status, and Configuration Channels 4-15

Valid Output Data Word Formats/Ranges

The analog output data received at the module is converted to

RAW/proportional data format. Unlike the 1769-IF4 and 1769OF2. on-board scaling is not provided by the module. You must do this via your control program.

The following table shows the valid output data format for the data range provided by the module.

Table 4.10 Valid Output Data

Output Range

0 to 10V dc

0 to 20mA

Output Value

Over +10.5V dc

+10.5V dc

0.0V dc to

+10.0V dc

Over 21.0 mA

21.0 mA

0.0 mA to 20.0 mA

Example Data

N/A

+ 10.5V dc

+10.0V dc

+5.0V dc

0.0V dc

N/A

21.0 mA

20.0 mA

10.0 mA

0.0 mA

Output Range

Condition

N/A

(1)

Over-range

Normal

N/A

Over-range

Safety Considerations When Troubleshooting on page 5-1

Normal

Raw/Proportional Data

Decimal Range

N/A

32640

31104

15488

N/A

32640

31104

15488

(1) The module’s maximum range is 10.5V or 21 mA. An over-range flag is set at either value. This flag automatically resets when the output data is below the over-range value.

Publication 1769-UM008A-EN-P - November 2001

4-16 1769-IF4XOF2 Module Data, Status, and Configuration Channels

Publication 1769-UM008A-EN-P - November 2001

Chapter

Module Diagnostics and Troubleshooting

Safety Considerations

When Troubleshooting

This chapter describes troubleshooting the analog input and output channels. This chapter contains information on:

•

•

Module Operation vs. Channel Operation on page 5-2

•

Module Diagnostic Features on page 5-3

•

Critical vs. Non-Critical Errors on page 5-4

•

Module Condition Errors on page 5-6

Safety considerations are an important element of proper troubleshooting procedures. Actively thinking about the safety of yourself and others, as well as the condition of your equipment, is of primary importance.

The following sections describe several safety concerns you should be aware of when troubleshooting your control system.

ATTENTION

Never reach into a machine to actuate a switch because unexpected motion can occur and cause injury.

Remove all electrical power at the main power disconnect switches before checking electrical connections or inputs/outputs causing machine motion.

Indicator Lights

When the green LED on the analog module is illuminated, it indicates that power is applied to the module.

Activating Devices When Troubleshooting

When troubleshooting, never reach into the machine to actuate a device. Unexpected machine motion could occur.

Publication 1769-UM008A-EN-P - November 2001

5-2 Module Diagnostics and Troubleshooting

Module Operation vs.

Channel Operation

Stand Clear of the Machine

When troubleshooting any system problem, have all personnel remain clear of the machine. The problem could be intermittent, and sudden unexpected machine motion could occur. Have someone ready to operate an emergency stop switch in case it becomes necessary to shut off power to the machine.

Program Alteration

There are several possible causes of alteration to the user program, including extreme environmental conditions, Electromagnetic

Interference (EMI), improper grounding, improper wiring connections, and unauthorized tampering. If you suspect a program has been altered, check it against a previously saved program on an

EEPROM or UVPROM memory module.

Safety Circuits

Circuits installed on the machine for safety reasons, like over-travel limit switches, stop push buttons, and interlocks, should always be hard-wired to the master control relay. These devices must be wired in series so that when any one device opens, the master control relay is de-energized, thereby removing power to the machine. Never alter these circuits to defeat their function. Serious injury or machine damage could result.

The module performs operations at two levels:

• module level

• channel level

Module-level operations include functions such as power-up, configuration, and communication with a bus master, such as a

MicroLogix 1500 or Compact Logix controller.

Channel-level operations describe channel related functions, such as data conversion and over-range detection.

Publication 1769-UM008A-EN-P - November 2001

Power-up Diagnostics

Module Diagnostics and Troubleshooting 5-3

Internal diagnostics are performed at both levels of operation. When detected, module error conditions are immediately indicated by the module status LED. Both module hardware and channel configuration error conditions are reported to the controller. Channel over-range conditions are reported in the module’s input data table. Module hardware errors are typically reported in the controller’s I/O status file. Refer to your controller manual for details.

At module power-up, a series of internal diagnostic tests are performed. These diagnostic tests must be successfully completed or the module status LED remains off and a module error results and is reported to the controller.

If module status LED is: Indicated condition: Corrective action:

Off

Proper Operation

Module Fault

No action required.

Cycle power. If condition persists, replace the module.

Channel Diagnostics

When an input or output channel is enabled, the module performs a diagnostic check to see that the channel has been properly configured. In addition, the module checks each channel on every scan for configuration errors and over-range conditions.

Out-of-Range Detection

For input channels, whenever the data received at the channel word is out of the defined operating range, an over-range error is indicated in input data word 4, bits 0 to 3 for input channels 0 through 3, respectively.

For output channels, whenever the controller is driving data over the defined operating range, an over-range error is indicated in the input data word 5, bits 0 and 1 for output channels 0 and 1, respectively.

Publication 1769-UM008A-EN-P - November 2001

5-4 Module Diagnostics and Troubleshooting

Critical vs. Non-Critical

Errors

Critical errors signal conditions that prevent normal or recoverable operation of the system. When these types of errors occur, the system leaves the run or program mode of operation until the error is

remedied. See Table 5.2 Extended Error Codes on page 5-5 for more

information on critical module errors.

Non-critical errors are recoverable and can be dealt with by running the Fault routine. For example, a channel over-range condition is a

non-critical error. See Table 5.2 Extended Error Codes on page 5-5 for

more information.

I/O Module Errors

The analog I/O modules notify the host of critical and non-critical module errors. Word 0 contains the error codes generated by the module. The module errors are expressed as two fields: Mod_Error

(bits 9, 10, and 11) and Extended_Error_Info (bits 0 to 8). The following table shows the error fields:

Output_State

Mod_Configured

Bus_WD_Timeout_Latch

Mod_Error r = read only

Extended_Error_Info

Mod_Error Field

The Mod_Error field classifies module errors into three groups:

•

No Errors (Mod_Error = 0): The module has no errors. There is no need to check the Extended_Error_Info field.

•

Hardware Errors (Mod_Error = 1): Check the

Extended_Error_Info field for general and specific error codes.

•

Configuration Errors (Mod_Error = 2): Check the

Extended_Error_Info field for module-specific error codes.

Publication 1769-UM008A-EN-P - November 2001

Module Diagnostics and Troubleshooting 5-5

Extended_Error_Info Field

Check the Extended_Error_Info field when a non-zero value is in the

Mod_Error field. The following are some Extended_Error_Info error codes:

Table 5.1 Extended Error Information Field

Error Type

No Error

Hardware Error

Configuration Error

Mod_Error (11:9)

Extended_Error_Info (8:0)

always 000

000 = no additional information

001 = Power-up Reset

002 to 0FF = general common errors

100 to 1FF = module specific errors

000 = no additional information

001 to 1FF = module specific errors

Extended Error Codes

When invalid values are entered in the configuration file, the module ignores the invalid configuration, generates a non-critical error, and keeps operating with the previous configuration. The following table explains the extended error codes for the 1769-IF4XOF2 analog combination module:

Table 5.2 Extended Error Codes

Error Type Hex

Equivalent

(1)

No Error

General Common

Hardware Error

Hardware-

Specific Error

1769-IF4XOF2 Specific

Configuration Error

X400

X401

X402

X403

X404

X000

X200

X201

X300

X301

(1) X represents the “Don’t Care” digit.

010

Module

Error

Code

Bits (11:9)

Binary

000

001

Extended Error

Information

Code Bits 8:0

Binary

0 0000 0000

0 0000 0001

1 0000 0000

1 0000 0001

0 0000 0000

0 0000 0001

0 0000 0010

0 0000 0011

0 0000 0100

Error Description

No Error

General Hardware Error; no additional information

Power-up reset state

General hardware error (ASIC)

Microprocessor hardware error

General configuration error; no additional information invalid Fault Value Entered for (channel 0) invalid Fault Value Entered for (channel 1) invalid Program Value Entered for (channel 0) invalid Program Value Entered for (channel 1)

Publication 1769-UM008A-EN-P - November 2001

5-6 Module Diagnostics and Troubleshooting

Module Condition Errors

Common Hardware Errors

There are several general common hardware errors. The following table lists these errors.

Table 5.3 Common Hardware Errors

Mod_Error

(11:9)

Extended_Error

_Info (8:0)

000

001

Error Description

No Errors

General hardware error; no additional information

Power-up reset state

Hardware Specific Errors

If the module detects that any of the analog to digital converters are not functioning properly, one of the following hardware errors is set:

Table 5.4 Specific Hardware Errors

Mod_Error

(11:9)

Extended_Error

_Info (8:0)

100

101

102

103

Error Description

General H/W error (ASIC)

Microprocessor H/W error

SPARE (not part of 1769-IF4XOF2 design)

Module Inhibit Function

Some controllers support the module inhibit function. See your controller manual for details.

Whenever the combination module is inhibited, it enters the program mode and the output channels are changed to the state configured for the program mode. The input channels of the module continue to provide information about changes at its inputs to the 1769 Compact

Bus Master (for example, a CompactLogix controller).

Publication 1769-UM008A-EN-P - November 2001

Contacting Rockwell

Automation

Module Diagnostics and Troubleshooting 5-7

If you need to contact Rockwell Automation for assistance, please have the following information available when you call:

• a clear statement of the problem, including a description of what the system is actually doing. Note the LED state; also note input and output image words for the module.

• a list of remedies you have already tried

• processor type and firmware number (See the label on the processor.)

• hardware types in the system, including all I/O modules

• fault code if the processor is faulted

Publication 1769-UM008A-EN-P - November 2001

5-8 Module Diagnostics and Troubleshooting

Publication 1769-UM008A-EN-P - November 2001

Appendix

Specifications

General Specifications

Specification

Dimensions

Approximate Shipping

Weight (with carton)

Storage Temperature

Operating Temperature

Operating Humidity

Operating Altitude

Vibration

Shock

Bus Current Draw (max.)

Heat Dissipation

System Power Supply

Distance Rating

Recommended I/O Cable

Maximum I/O Cable

Length

Module OK LED

Agency Certification

Vendor I.D. Code

Product Type Code

Product Code

1769-IF4XOF2

118 mm (height) x 87 mm (depth) x 35 mm (width) height including mounting tabs is 138 mm

4.65 in. (height) x 3.43 in (depth) x 1.38 in (width) height including mounting tabs is 5.43 in.

290g (0.64 lbs.)

-40°C to +85°C (-40°F to +185°F)

0°C to +60°C (32°F to +140°F)

5% to 95% non-condensing

2000 meters (6561 feet)

Operating: 10 to 500 Hz, 5G, 0.030 in. peak-to-peak

Relay Operation: 2G

(1)

Operating: 30G, 11 ms panel mounted

(20G, 11 ms DIN rail mounted)

Relay Operation: 7.5G panel (5G DIN rail mounted)

Non-Operating: 40G panel mounted

(30G DIN rail mounted)

120 mA at 5V dc

160 mA at 24V dc

3.03 Total Watts (The Watts per point, plus the minimum

Watts, with all points energized.)

8 (The module may not be more than 8 modules away from a system power supply.)

Belden™ 8761 (shielded)

200m (656 feet) Exceeding cable length reduces accuracy.

For more information, see “Effect of Transducer/Sensor

Cable Length Impedance on Voltage Input Accuracy” on

page 3-11 and “Effect of Device and Cable Output

Impedance on Output Module Accuracy” on page 3-13.

On: module has power, has passed internal diagnostics, and is communicating over the bus.

Off: Any of the above is not true.

C-UL certified (under CSA C22.2 No. 142)

UL 508 listed

CE and C-Tick compliant for all applicable directives

Publication 1769-UM008A-EN-P - November 2001

A-2 Specifications

Input Specifications

Publication 1769-UM008A-EN-P - November 2001

Specification

Hazardous Environment

Class

Radiated and Conducted

Emissions

Electrical /EMC:

ESD Immunity

(IEC61000-4-2)

Radiated Immunity

(IEC61000-4-3)

Fast Transient Burst

(IEC61000-4-4)

Surge Immunity

(IEC61000-4-5)

Conducted Immunity

(IEC61000-4-6)

1769-IF4XOF2

Class I, Division 2, Hazardous Location, Groups A, B, C, D

(UL 1604, C-UL under CSA C22.2 No. 213)

EN50081-2 Class A

The module has passed testing at the following levels:

•

4 kV contact, 8 kV air, 4 kV indirect

•

10 V/m , 80 to 1000 MHz, 80% amplitude modulation, +900 MHz keyed carrier

•

2 kV, 5kHz

•

1kV galvanic gun

•

10V, 0.15 to 80MHz

(2)

(1) When a relay module, such as the 1769-OW8, is used.

(2) Conducted Immunity frequency range may be 150 kHz to 30 MHz if the Radiated Immunity frequency range is

30 MHz to 1000 MHz.

Specification

Number of Inputs

Analog Normal Operating

Ranges

Full Scale

(1)

Analog

Ranges

Converter Type

Resolution (max.)

Response Speed per

Channel

Rated Working Voltage

(2)

1769-IF4XOF2

4 differential or single-ended

Voltage: 0 to 10V dc

Current: 0 to 20 mA

Voltage: 0 to 10.5V dc

Current: 0 to 21 mA

Successive Approximation

8 bits plus sign (Sign is always positive)

5 ms

30V ac/30V dc

Common Mode Voltage

(3) 10V dc maximum per channel

Common Mode Rejection greater than 60 dB at 60 Hz at 1V between inputs and analog common

Normal Mode Rejection

Input Impedance

Overall Accuracy

25°C

Accuracy Drift with

Temperature

(4)

Overall Accuracy at

0 to 60°C

at none

Voltage Terminal: 150K

Ω

(nominal)

Current Terminal: 150

Ω

(nominal)

Voltage Terminal: ±0.7% full scale

Current Terminal: ±0.6% full scale

Voltage Terminal: ±0.9% full scale

Current Terminal: ±0.8% full scale

Voltage Terminal: ±0.006% per °C

Current Terminal: ±0.006% per °C

Output Specifications

Specifications A-3

Specification

Calibration

Non-linearity (in percent full scale)

Repeatability

(5)

Input Channel

Configuration

1769-IF4XOF2

Not required. Accuracy is guaranteed by components.

±0.4%

Channel Diagnostics

Maximum Overload at

Input Terminals

(6)

Input Group to Bus

Isolation via wiring of devices, configuration software screen, or the user program (by writing a unique bit pattern into the module’s configuration file). Refer to your controller’s user manual to determine if user program configuration is supported.

Over range by bit reporting

Voltage Terminal: 20V continuous, 0.1 mA

Current Terminal: 32 mA continuous, 5V dc

500V ac or 710V dc for 1 minute (qualification test)

30V ac/30V dc working voltage (IEC Class 2 reinforced insulation)

(1) The over-range flag will come on when the normal operating range is exceeded. The module will continue to convert the analog input up to the maximum full scale range. The flag automatically resets when within the normal operating range.

(2) Rated working voltage is the maximum continuous voltage that can be applied at the input terminal, including the input signal and the value that floats above ground potential (for example, 10V dc input sig nal and 20V dc potential above ground).

(3) For proper operation, both the plus and minus input terminals must be within 0 to +10V dc of analog common.

(4) Includes offset, gain, non-linearity and repeatability error terms.

(5) Repeatability is the ability of the input module to register the same reading in successive measurements for the same input signal.

(6) Damage to the input circuit may occur if this value is exceeded.

Specification

Number of Outputs

Analog Normal Operating

Ranges

(1)

1769-IF4XOF2

2 single-ended

Voltage: 0 to 10V dc

Current: 0 to 20 mA

Full Scale Analog Ranges Voltage: 0 to 10.5V dc

Current: 0 to 21 mA

Converter Type Resistor String

Resolution (max.)

Response Speed per

Channel

Current Load on Voltage

Output

8 bits plus sign (Sign is always positive, Bit 15 = 0)

0.3 ms for rated resistance and rated inductors

3.0 ms for rated capacitance

10 mA max.

0 to 300

Ω

(includes wire resistance) Resistive Load on Current

Output

Load Range on Voltage

Output

Max. Inductive Load

(Current Outputs)

>1 k

Ω

0.1 mH at 10V dc

Publication 1769-UM008A-EN-P - November 2001

A-4 Specifications

Specification

Max. Capacitive Load

(Voltage Outputs)

Overall Accuracy

(2)

25°C

Overall Accuracy at 0 to

60°C

Accuracy Drift with

Temperature

Output Ripple;

(3) range 0 - 50 kHz

(referred to output range)

Non-linearity

(in percent full scale)

Repeatability

(4)

(in percent full scale)

Output Impedance

Open and Short-Circuit

Protection

Maximum Short-Circuit

Maximum Open Circuit

Output Response at

System Power Up and

Power Down

Rated Working Voltage

Channel Diagnostics

Output Group to

Backplane Isolation

1769-IF4XOF2

1 µF

Voltage Terminal: ±0.5% full scale

Current Terminal: ±0.5% full scale

Voltage Terminal: ±0.6% full scale

Current Terminal: ±1.0% full scale

Voltage Terminal: ±0.01% full scale per °C

Current Terminal: ±0.01% full scale per °C

±0.05%

±0.4%

±0.05%

Yes

Ω

(nominal)

Current: 40 mA

Voltage: 15V

+2.0V dc to -1.0V dc spike for less than 6 ms

30V ac/30V dc

Over range by bit reporting

500V ac or 710V dc for 1 minute (qualification test)

30V ac/30V dc working voltage (IEC Class 2 reinforced insulation)

(1) The over-range flag will come on when the normal operating range is exceeded. The module will continue to convert the analog output up to the maximum full scale range. The flag automatically resets when within the normal operating range.

(2) Includes offset, gain, drift, non-linearity and repeatability error terms.

(3) Output ripple is the amount a fixed output varies with time, assuming a constant load and temperature.

(4) Repeatability is the ability of the output module to reproduce output readings when the same controller value is applied to it consecutively, under the same conditions and in the same direction.

Publication 1769-UM008A-EN-P - November 2001

Appendix

Module Addressing and Configuration with

MicroLogix 1500

Module Addressing

slot e

Input Image File slot e

Configuration

File slot e

Output Image

File

This chapter examines the analog module’s addressing scheme and describes module configuration using RSLogix 500 and MicroLogix

1500.

The following memory map shows the input, output, and configuration image tables for the 1769-IF4XOF2. Detailed information

for these image tables can be found on page 4-3.

Input Image

8 words

Configuration File

6 words

Output Image

2 words

Memory Map

Channel 0 Input Word

Channel 1 Input Word

Channel 2 Input Word

Channel 3 Input Word

Over-range Bits - Inputs

Over-range Bits - Outputs

Channel 0 Output Loopback

Channel 1 Output Loopback

Word 0

Word 1

Word 2

Word 3

Word 5

Word 6, bits 7 to 14

Word 7, bits 7 to 14

Address

I:e.0

I:e.1

I:e.2

I:e.3

I:e.4

I:e.5

I:e.6/7 to I:e.6/14

I:e.7/7 to I:e.7/14

Configuration Word

Output Channel 0 Fault Value

Output Channel 0 Program (Idle) Value

Output Channel 1 Fault Value

Output Channel 1 Program (Idle) Value

Word 0

Word 1

Word 2

Word 3

Word 4

Word 5

Refer to your controller’s user manual for addresses.

Bit 15

Channel 0 Output Data Word

Channel 1 Output Data Word

Bit 0

Word 0

Word 1

O:e.0

O:e.1

Publication 1769-UM008A-EN-P - November 2001

B-2 Module Addressing and Configuration with MicroLogix 1500

1769-IF4XOF2 Input Image

The input image file represents input channel data words I/O, channel status bits. Input words 0 through 3 contain the converted analog input data from the field device. Word 4, bits 0 to 3 are the over-range flag bits for input channels 0 to 3. Word 5, bit 0 and 1 are the over-range flag bits for channels 0 and 1. Words 6 and 7, bits 7 through 14 are the data echo. These words provide output loopback/data echo through the input array. The Input Data File is

explained in more detail on page 4-3. To receive valid status

information, the channel must be enabled.

TIP

You can access information in the input image file using the programming software configuration screen.

For example, to obtain the over-range status of input channel 2 of the

1769-IF4XOF2 analog module located in slot 3, use address I:3.4/2.

Slot

Word

Bit

Input File Type

I:3.4/2

Element Delimiter Word Delimiter Bit Delimiter

TIP

0 1 2

Slot Number

The end cap does not use a slot address.

Publication 1769-UM008A-EN-P - November 2001

Module Addressing and Configuration with MicroLogix 1500 B-3

1769-IF4XOF2 Configuration File

The configuration file allows you to enable or disable the modules input and/or output channels. It also allows you to select how the

Program or Fault mode condition and what the output value will be if the User-defined Safe State is selected. The configuration file is

explained in more detail in Configuration Data File on page 4-8.

The configuration file is modified using the programming software configuration screen. For an example of module configuration using

RSLogix 500.

TIP

The RSLogix 500 configuration default is to enable each analog input channel. For improved analog input module performance, disable any unused channels.

Table B.1 Software Configuration Channel Defaults

1769-IF4XOF2

Parameter

Enable/Disable Input/Output Channel

Program Mode (Outputs)

Fault Mode (Outputs)

Default Setting

Disabled

Hold Last State

Configuring 1769-IF4XOF2 in a MicroLogix 1500 System

This example takes you through configuring your 1769-IF4XOF2 analog module with RSLogix 500 programming software. This application example assumes your module is installed as expansion

I/O in a MicroLogix 1500 system, and that RSLinx™ is properly configured and a communications link has been established between the MicroLogix processor and RSLogix 500.

Publication 1769-UM008A-EN-P - November 2001

B-4 Module Addressing and Configuration with MicroLogix 1500

Start RSLogix and create a MicroLogix 1500 application. The following screen appears:

While offline, double-click on the IO Configuration icon under the controller folder and the following IO Configuration screen appears.

Publication 1769-UM008A-EN-P - November 2001

This screen allows you to manually enter expansion modules into expansion slots, or to automatically read the configuration of the controller. To read the existing controller configuration, click on the

Read IO Config button.

Module Addressing and Configuration with MicroLogix 1500 B-5

A communications dialog appears, identifying the current communications configuration so that you can verify the target controller. If the communication settings are correct, click on Read IO

Config.

The actual I/O configuration is displayed. In this example, the

1769-IF4XOF2 is attached to the MicroLogix 1500 processor.

Publication 1769-UM008A-EN-P - November 2001

B-6 Module Addressing and Configuration with MicroLogix 1500

Configuring the 1769-IF4XOF2

The 1769-IF4XOF2 analog module is installed in slot 1. To configure the module, double-click on the module/slot. The 1769-IF4XOF2 general configuration screen appears.

Publication 1769-UM008A-EN-P - November 2001

Module Addressing and Configuration with MicroLogix 1500 B-7

Analog Input/Output Configuration

Each of the four analog input words (channels) and two output words

(channels) are disabled by default. To enable a channel, click its

Enable box so that a check mark appears in it. For optimum module performance, disable any channel that is not hardwired to a real input.

Generic Extra Data Configuration

This tab redisplays the configuration information entered on the

Analog Input Configuration screen in a raw data format. You have the option of entering the configuration using this tab instead of the

Analog Input Configuration tab. You do not have to enter data in both places.

Publication 1769-UM008A-EN-P - November 2001

B-8 Module Addressing and Configuration with MicroLogix 1500

Publication 1769-UM008A-EN-P - November 2001

Appendix

Configuration Using the 1769-IF4XOF2

Combination Analog Module with a

CompactLogix System

The following is used to generate a Generic or Thin Profile and configure the 1769-IF4XOF2 analog combination module in

RSLogix5000.

Version 8.02 of RSLogix5000 and the CompactLogix controllers support only the Generic 1769 Module Profile for 1769-IF4XOF2.

Version 10 of RSLogix 5000 and the CompactLogix controllers provides a “Thin” Profile for the 1769-IF4XOF2 module.

TIP

A Thin profile for an I/O module provides an extra layer of support when entering and configuring an

I/O module in your project. You do not enter I/O and Configuration file lengths for a Thin profile as you must when using the Generic profile. In addition, the I/O and Configuration tags that are created for each I/O module contain descriptive tag elements, making it easier to identify each I/O and

Configuration parameter.

Adding a 1769-IF4XOF2

Module to Your System

Refer to Chapter 3 of this manual for detailed information on wiring

your 1769-IF4XOF2 analog combination module.

Start RSLogix 5000 programming software by double-clicking its icon on your desktop. The following screen displays:

Publication 1769-UM008A-EN-P - November 2001

C-2 Configuration Using the 1769-IF4XOF2 Combination Analog Module with a CompactLogix System

Click the File pull down menu and select New or click the New icon.

Choose your controller type, name your project, then click OK. A new project screen displays.

The area on the left of this screen is called the Controller Organizer.

This is where controller properties, tasks, tags and I/O are found.

The last entry is called “[0] CompactBus Local”. This is where the local

I/O is entered into your project. Right click on it and select “New

Module.” One of the following screens displays, depending upon your version of RSLogix 5000:

RSLogix 5000 Version 8 - Generic Profile RSLogix 5000 Version 10 - Thin Profile

Publication 1769-UM008A-EN-P - November 2001

Configuration Using the 1769-IF4XOF2 Combination Analog Module with a CompactLogix System C-3

Select either the generic 1769-MODULE or the 1769-IF4XOF2/A and click OK.

For RSLogix 5000 version 10, see Thin Profile below.

For RSLogix 5000 version 8, see Generic Profile on page C-4.

Thin Profile

Once you have selected the 1769-IF4XOF2 module and clicked OK, the following screen appears:

Enter a name for your module and a description, if desired. You may

Click Finish. The appropriate I/O and Configuration tags are created, and the module appears in the Controller Organize below the

“[0] CompactBus Local”.

See Configuring the 1769-IF4XOF2 Analog Combination Module on page C-5 to continue.

Publication 1769-UM008A-EN-P - November 2001

C-4 Configuration Using the 1769-IF4XOF2 Combination Analog Module with a CompactLogix System

Generic Profile

Once you have selected the Generic 1769 Module and clicked OK, the following screen appears:

Publication 1769-UM008A-EN-P - November 2001

IMPORTANT

Do not modify the “Assembly Instance” values.

Enter a name and choose “Data-INT” for the “Comm Format”. Enter the Input, Output and Configuration data lengths for the following:

•

Input Size:

•

Output Size:

•

Configuration Size: 6

When you have entered all necessary parameters, click Finish. The module with the name you entered appears below “[0] CompactBus

Local” in the Controller Organizer.

See Configuring the 1769-IF4XOF2 Analog Combination Module on page C-5 to continue.

Configuring the

1769-IF4XOF2 Analog

Combination Module

Configuration Using the 1769-IF4XOF2 Combination Analog Module with a CompactLogix System C-5

When you add an I/O module into a CompactLogix system, the Input,

Output and Configuration tags are automatically created in the

Controller Tag base for that module.

TIP

When a Thin Profile is used, each of these tags and their sub elements contain descriptive names, which match the documentation for that module.

For the case of the 1769-IF4XOF2, the following tags are created:

Local:s:I Input tag

Local:s:O Output tag

Local:s:C Configuration tag where “s” is the slot number of the I/O module

The screen below shows the 1769-IF4XOF2 in slot 1.

Each of these tags is expanded by clicking on the plus sign to its left.

Click the plus sign to the left of the Configuration tag, then also click the plus sign to the left of “Local:1:C.Data.”

Publication 1769-UM008A-EN-P - November 2001

C-6 Configuration Using the 1769-IF4XOF2 Combination Analog Module with a CompactLogix System

One of the following screens displays, depending upon whether you are using a Generic or Thin Profile:

RSLogix 5000 Version 8 - Generic Profile

RSLogix 5000 Version 10 - Thin Profile

Publication 1769-UM008A-EN-P - November 2001

Configuration Using the 1769-IF4XOF2 Combination Analog Module with a CompactLogix System C-7

This Configuration tag is 198 words long. Only the first 6 are needed to configure this module. The remainder of the words in this tag should be a value of 0 decimal.

The 6 words of configuration data are entered in the following tags, assuming the module was configured in slot 1:

Tags in RSLogix 5000

Version 8

Generic Profile

Local:1:C.Data[0] Configuration Data for

Analog Input Channels

Configuration Data for

Analog Output Channels

Channel 0 Fault Value

Local:1:C.Data[1]

Local:1:C.Data[2]

Channel 0 Program Value Local:1:C.Data[3]

Channel 1 Fault Value Local:1:C.Data[4]

Channel 1 Program Value Local:1:C.Data[5]

in RSLogix 5000

Version 10

Thin Profile

Local:1.C.Config0

Local:1.C.Config1

Local:1.C.Ch0FaultValue

Local:1.C.Ch1FaultValue

Local:1.C.Ch0ProgValue

Local:1.C.Ch1ProgValue

The four input channels for this module are not configurable. Each input channel supports either 4 to 20mA current or 0 to 10V dc voltage. This choice is determined by the module terminal to which you are wired. There is a current and a voltage terminal for each analog channel.

TIP

CompactLogix controllers do not yet support Hold

Last State (HLS) or User Defined Safe State (UDSS) for Fault and Program modes for outputs. Analog modules, by default, hold outputs in their last state if the connection is lost to the controller (Fault State) or if the controller is placed into the Program mode or

Faults (Program State).

Publication 1769-UM008A-EN-P - November 2001

C-8 Configuration Using the 1769-IF4XOF2 Combination Analog Module with a CompactLogix System

You can only modify the configuration file to enable the input and output channels being used.

To enable channels:

Using RSLogix 5000 version 8

Generic Profile

Enter a 1 in bits Local:1:C.Data[0]/4 though

Local:1:C.Data[0]/7 for input channels 0 through 3.

Using RSLogix 5000 version 10

Thin Profile

Set Local:1:C.Ch0InputEn through

Local:1:C.Ch3InputEn equal to 1.

Enter a 1 in bits Local:1:C.Data[1]/4 and

Local:1:C.Data[0]/5 for input channels 0 and

Set Local:1:C.Ch0OutputEn through

Local:1:C.Ch3OutputEn equal to 1.

TIP

All other selections in the 6 word configuration file for the analog combination module concern HLS and

UDSS, which is not yet supported by the

CompactLogix controllers. Leave these settings at their default values.

Once the configuration is complete for the 1769-IF4XOF2 module, and any other modules in your system have been entered and configured, you can write your program, and save and download your project to the controller. The configuration files are downloaded to the controller at the same time the project is downloaded to the controller. They are also sent to the module at power up and when an inhibited module is uninhibited.

Publication 1769-UM008A-EN-P - November 2001

Configuration Using the 1769-IF4XOF2 Combination Analog Module with a CompactLogix System C-9

Accessing the Input and

Output Tags

Thin Profile

The analog input data file may be accessed by clicking the plus sign to the left of the input tag, Local:1:I. Fault and status information for the module can be found in this input tag. Refer to Chapter 5

concerning the 32-bit Fault value (Local:1:I.Fault). 4, pages 4-3

through 4-6 describe each value in the input file for the 1769-IF4XOF2

module.

The actual analog input data for this module can be found in the following tags under Local:1:I.

•

Local:1:I.Ch0Data Data for input Channel 0

•

Local:1:I.Ch1Data Data for input Channel 1

•

Local:1:I.Ch2Data Data for input Channel 2

•

Local:1:I.Ch3Data Data for input Channel 3

The analog output data for the two analog output channels must be written to the following tags under Local:1:O :

•

Local:1:O.Ch0Data Data for output Channel 0

•

Local:1:O.Ch1DataData for output Channel 1

Generic Profile

Wire the module to your analog devices, or for test purposes, wire an output on the module to an input on the module. The analog input and output data can be found at the following tag locations:

•

Local:1:I.Data[0]

•

Local:1:I.Data[1]

•

Local:1:I.Data[2]

•

Local:1:I.Data[3]

•

Local:1:I.Data[4]

•

Local:1:I.Data[5]

•

Local:1:I.Data[6]

•

Local:1:I.Data[7]

Input Channel 0 Data

Input Channel 1 Data

Input Channel 2 Data

Input Channel 3 Data

Input Channels Status Flags

Output Channels Status Flags

Output Data Echo [0]

Output Data Echo [1]

•

Local:1:O.Data[0] Output Channel 0 Data

•

Local:1:O.Data[1] Output Channel 1 Data

Publication 1769-UM008A-EN-P - November 2001

C-10 Configuration Using the 1769-IF4XOF2 Combination Analog Module with a CompactLogix System

When the Input and Output tags for the 1769-IF4XOF2 module are expanded in the CompactLogix Controller Tags screen, they look like the following:

Publication 1769-UM008A-EN-P - November 2001

The analog data is presented to the controller in Raw/Proportional format. This means the data for the two possible analog types is:

0 to 20mA Raw/Proportional data range 0 to 31104 decimal

0 to 10V dc Raw/proportional data range 0 to 31104 decimal

TIP

This module only uses bits 7 through 14 to represent the analog data.

Two’s Complement Binary Numbers

Appendix

The processor memory stores 16-bit binary numbers. Two’s complement binary is used when performing mathematical calculations internal to the processor. Analog input values from the analog modules are returned to the processor in 16-bit two’s complement binary format. For positive numbers, the binary notation and two’s complement binary notation are identical.

As indicated in the figure on the next page, each position in the number has a decimal value, beginning at the right with 2

0 and ending at the left with 2

. Each position can be 0 or 1 in the processor memory. A 0 indicates a value of 0; a 1 indicates the decimal value of the position. The equivalent decimal value of the binary number is the sum of the position values.

Positive Decimal Values

The far left position is always 0 for positive values. As indicated in the figure below, this limits the maximum positive decimal value to 32640

(all positions are 1 except the far left position).

1 x 2

= 16384

1 x 2

= 8192

1 x 2

= 4096

1 x 2

= 2048

1 x 2

= 1024

1 x 2

= 512

1 x 2

= 256

1 x 2

= 128

0 x 2

= 64

0 x 2

= 0

0 x 2

= 0

0 x 2

= 0

0 x 2

= 0

0 x 2

= 0

0 x 2

= 0

0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0

16384

8192

4096

2048

1024

512

256

128

________

32640

0 x 2

= 0 This position is always 0 for positive numbers.

Publication 1769-UM008A-EN-P - November 2001

D-2 Two’s Complement Binary Numbers

Publication 1769-UM008A-EN-P - November 2001

Glossary

The following terms and abbreviations are used throughout this manual. For definitions of terms not listed here refer to Allen-Bradley’s

Industrial Automation Glossary, Publication AG-7.1.

A/D Converter – Refers to the analog to digital converter inherent to the module. The converter produces a digital value whose magnitude is proportional to the magnitude of an analog input signal.

alternate last state – A configuration selection that instructs the module to convert a user-specified value from the channel fault or program/idle word to the output value when the module enters the fault or program mode.

analog input module – A module that contains circuits that convert analog voltage or current input signals to digital values that can be manipulated by the processor.

attenuation – The reduction in the magnitude of a signal as it passes through a system.

bus connector – A 16-pin male and female connector that provides electrical interconnection between the modules.

channel – Refers to analog input or output interfaces available on the module’s terminal block. Each channel is configured for connection to a variable voltage or current input or output device, and has its own data and diagnostic status words.

channel update time – The time required for the module to sample and convert the input signals of one enabled input channel and update the channel data word.

common mode rejection – For analog inputs, the maximum level to which a common mode input voltage appears in the numerical value read by the processor, expressed in dB.

common mode rejection ratio – The ratio of a device’s differential voltage gain to common mode voltage gain. Expressed in dB, CMRR is a comparative measure of a device’s ability to reject interference caused by a voltage common to its input terminals relative to ground.

CMRR=20 Log

10 (V1/V2)

common mode voltage – For analog inputs, the voltage difference between the negative terminal and analog common during normal differential operation.

common mode voltage range – For analog inputs, the largest voltage difference allowed between either the positive or negative terminal and analog common during normal differential operation.

Publication 1769-UM008A-EN-P - November 2001

configuration word – Contains the channel configuration information needed by the module to configure and operate each channel.

D/A Converter– Refers to the digital to analog converter inherent to the output module. The converter produces an analog dc voltage or current signal whose instantaneous magnitude is proportional to the magnitude of a digital value.

dB – (decibel) A logarithmic measure of the ratio of two signal levels.

data echo – The analog value currently being converted by the D/A converter and shown in words 2 and 3 of the output module’s input data file. Under normal operating conditions, the data echo value is the same value that is being sent from the bus master to the output module.

data word – A 16-bit integer that represents the value of the analog input or output channel. The channel data word is valid only when the channel is enabled and there are no channel errors. When the channel is disabled the channel data word is cleared (0).

differential operation – The difference in voltage between a channel’s positive terminal and negative terminal.

digital filter – A low-pass filter incorporated into the A/D converter.

The digital filter provides very steep roll-off above it’s cut-off frequency, which provides high frequency noise rejection.

filter – A device that passes a signal or range of signals and eliminates all others.

filter frequency – (-3 dB frequency) The user-selectable frequency.

full scale – The magnitude of voltage or current over which normal operation is permitted.

full scale error – (gain error) The difference in slope between the actual and ideal analog transfer functions.

full scale range – (FSR) The difference between the maximum and minimum specified analog input values.

hold last state – A configuration selection that instructs the module to keep the outputs at the last converted value prior to the condition that caused the control system to enter the fault or program mode.

input image – The input from the module to the controller. The input image contains the module data words and status bits.

LSB – (Least Significant Bit) The bit that represents the smallest value within a string of bits. For analog combo modules, 8-bit, binary codes are used in the I/O image in the card.

For analog combo inputs, the LSB is defined as the bit 7, of the 16-bit field. For analog outputs, the seven rightmost bits are not significant, and the LSB is defined as the eighth bit from the right, bit 7, of the

16-bit field.

linearity error – An analog input or output is composed of a series of voltage or current values corresponding to digital codes. For an ideal analog input or output, the values lie in a straight line spaced by a voltage or current corresponding to 1 LSB. Any deviation of the converted input or actual output from this line is the linearity error of the input or output. The linearity is expressed in percent of full scale input or output. See the variation from the straight line due to linearity error (exaggerated) in the example below.

Actual Transfer

Function

Ideal Transfer

number of significant bits – The power of two that represents the total number of completely different digital codes an analog signal can be converted into or generated from.

module scan time – same as module update time

module update time – For input modules, the time required for the module to sample and convert the input signals of all enabled input channels and make the resulting data values available to the processor. For output modules, the time required for the module to receive the digital code from the processor, convert it to the analog output signal, and send it to the output channel.

multiplexer – An switching system that allows several signals to share a common A/D or D/A converter.

normal mode rejection – (differential mode rejection) A logarithmic measure, in dB, of a device’s ability to reject noise signals between or among circuit signal conductors.

normal operating range – Input or output signals are within the

configured range. See page 1-2 for a list of input and output

types/ranges.

Publication 1769-UM008A-EN-P - November 2001

overall accuracy – The worst-case deviation of the output voltage or current from the ideal over the full output range is the overall accuracy. For inputs, the worst-case deviation of the digital representation of the input signal from the ideal over the full input range is the overall accuracy. this is expressed in percent of full scale.

Gain error, offset error, and linearity error all contribute to input and output channel accuracy.

output accuracy – The difference between the actual analog output value and what is expected, when a given digital code is applied to the d/a converter. Expressed as a ± percent of full scale. The error will include gain, offset and drift elements, and is defined at 25°C, and also over the full operating temperature range (0 to 60°C).

output image – The output from the controller to the output module.

The output image contains the analog output data.

analog output module – An I/O module that contains circuits that output an analog dc voltage or current signal proportional to a digital value transferred to the module from the processor.

repeatability – The closeness of agreement among repeated measurements of the same variable under the same conditions.

resolution – The smallest detectable change in a measurement, typically expressed in engineering units (e.g. 1 mV) or as a number of bits. For example a 8-bit system has 256 possible output states. It can therefore measure 1 part in 256.

status word – Contains status information about the channel’s current configuration and operational state. You can use this information in your ladder program to determine whether the channel data word is valid.

step response time – For inputs, this is the time required for the channel data word signal to reach a specified percentage of its expected final value, given a large step change in the input signal.

update time – see “module update time”

A

A/D

converter

definition

abbreviations

analog input module

definition

overview

1-1

attenuation

definition

B

before you begin

bus connector

definition

bus interface

1-4

C

calibration

A-3

channel

definition

channel diagnostics

5-3

channel reconfiguration time

channel scan time

channel status LED

channel step response

channel switching time

channel update time

definition

CMRR. See common mode rejection ratio

common mode rejection

definition

common mode rejection ratio

definition

common mode voltage

definition

common mode voltage range

definition

specification

configuration word

definition

contacting Rockwell Automation

current draw

D

D/A converter

definition

Index data echo

definition

data word

definition

definition

decibel. See dB.

definition of terms

differential mode rejection. See normal mode rejection.

DeviceNet adapter

user manual publication number

P-2

differential operation

definition

digital filter

definition

DIN rail mounting

3-8

E

electrical noise

EMC Directive

3-1

end cap terminator

2-3

equipment required for installation

error codes

5-5

European Union Directives

3-1

extended error codes

5-5

F

fault condition

at power-up

filter

definition

filter frequency

and channel step response

definition

FSR. See full scale range.

full scale

definition

full scale error

definition

full scale range

definition

input specifications

output specifications

A-3

G

gain error. See full scale error.

grounding

3-10

Publication 1769-UM008A-EN-P - November 2001

2 Index

H

heat considerations

hold last state

definition

fault mode

4-10

I

inhibit function

5-6

input data formats

valid formats/ranges

4-14

4-15

input filter selection

input image

definition

installation

getting started

grounding

heat and noise considerations

L

least significant bit. See LSB.

LED

5-1

linearity error

definition

LSB

definition

M

module inhibit function

5-6

module operation diagram

module scan time

definition

module update time

definition

mounting

multiplexer

definition

multiplexing

N

normal mode rejection

definition

ratio

number of significant bits

definition

Publication 1769-UM008A-EN-P - November 2001

O

operation

module

system

out-of-range detection

5-3

over-range flag bits

4-4

output image

definition

output module

enable channel

4-9

4-10

output module status

over-range flag bits

4-4

overall accuracy

definition

over-range flag bits

4-4

P

panel mounting

3-7

–

3-8

positive decimal values

D-1

power-up diagnostics

5-3

power-up sequence

program alteration

5-2

R

reconfiguration time

replacing a module

3-9

resolution

definition

RSLogix 500

configuration example

B-1

S

safety circuits

scan time

spacing

specifications

start-up instructions

status word

definition

step response

step response time

definition

switching time

system operation

T

terminal door label

3-18

terminal screw torque

3-16

tools required for installation

update time. See channel update time.

troubleshooting

safety considerations

5-1

two’s complement binary numbers

D-1

U

update time. See module update time.

W

wire size

wiring

differential inputs

input module

mixed transmitter type

3-20

module

3-16

output module

3-21

routing considerations