ICP DAS USA PETL-7053 User Manual
PETL/tET/tPET DIO Series
User Manual
Ethernet I/O Modules
Ver.2.2.1, Mar. 2018
WARRANTY
All products manufactured by ICP DAS are warranted
against defective materials for a period of one year
from the date of delivery to the original purchaser.
WARNING
ICP DAS assumes no liability for damages consequent
to the use of this product. ICP DAS reserves the right to
change this manual at any time without notice. The
information furnished by ICP DAS is believed to be
accurate and reliable. However, no responsibility is
assumed by ICP DAS for its use, nor for any
infringements of patents or other rights of third
parties resulting from its use.
COPYRIGHT
Copyright © 2017 by ICP DAS. All rights are reserved.
TRADEMARK
Names are used for identification only and may be
registered trademarks of their respective companies.
CONTACT US
If you have any questions, please feel free to contact us
via email at:
service@icpdas.com, service.icpdas@gmail.com
SUPPORT
This manual relates to the following modules:
PETL-7060
tET-P6, tPET-P6
tET-PD6, tPET-PD6
tET-C4, tPET-C4
tET-A4, tPET-A4
tET-P2C2, tPET-P2C2
tET-P2A2, tPET-P2A2
tET-P2POR2, tPET-P2POR2,
tET-PD2POR2, tPET-PD2POR2
tET-P2R2, tPET-P2R2
tET-PD2R1, tPET-PD2R1
Ethernet I/O Modules
TABLE OF CONTENTS
PACKING LIST ................................................................................................................................................................ 4
MORE INFORMATION ................................................................................................................................................... 4
1.
INTRODUCTION ................................................................................................................................................ 5
2.
1.1
PRODUCT INFORMATION............................................................................................................................................ 6
1.1.1 Ethernet IO Module Series ................................................................................................................................. 6
1.1.2
Selection Guide ............................................................................................................................................. 8
1.1.3
Comparison of PETL/tET/tPET Module .......................................................................................................... 9
1.2
FEATURES .............................................................................................................................................................. 11
3.
2.1
FRONT AND BACK PANEL ......................................................................................................................................... 14
Ethernet Port ............................................................................................................................................................. 15
J1 Connector .............................................................................................................................................................. 15
Operating Mode Switch............................................................................................................................................. 17
System LED Indicator ................................................................................................................................................. 18
J2 Connector .............................................................................................................................................................. 18
2.2 SPECIFICATIONS .............................................................................................................................................................. 19
2.2.1 System Specifications ....................................................................................................................................... 19
2.2.2 I/O Specifications ............................................................................................................................................. 20
2.3PIN ASSIGNMENTS ........................................................................................................................................................... 25
tET-P6/tPET-P6/tET-PD6/tPET-PD6 ...................................................................................................................... 25
tET-C4/tPET-C4/tET-A4/tPET-A4 ........................................................................................................................... 26
tET-P2POR2/tPET-P2POR2/tET-P2R2/tPET-P2R2 ................................................................................................ 27
tET-PD2POR2/tPET-PD2POR2 ................................................................................................................................ 28
tET-PD2R1/tPET-PD2R1 .......................................................................................................................................... 29
tET-P2C2/tPET-P2C2/tET-P2A2/tPET-P2A2 .......................................................................................................... 30
PETL-7060 ................................................................................................................................................................ 31
2.4 WIRING CONNECTIONS .................................................................................................................................................... 32
2.4.1
Input Wiring ............................................................................................................................................... 32
2.4.2
Output Wiring ............................................................................................................................................ 33
2.5 DIMENSIONS ................................................................................................................................................................... 35
4.
3.1 MOUNTING THE MODULE................................................................................................................................................. 37
3.2 CONFIGURING THE BOOT MODE........................................................................................................................................ 39
3.3 CONNECTING TO A NETWORK, A PC AND A POWER SUPPLY ................................................................................................. 40
3.4 USING THE ESEARCH UTILITY TO ASSIGN A NEW IP ............................................................................................................ 41
HARDWARE INFORMATION ............................................................................................................................14
GETTING STARTED ..........................................................................................................................................37
WEB CONFIGURATION ....................................................................................................................................44
4.1 LOGGING IN TO THE WEB SERVER ......................................................................................................................................... 44
4.2 HOME ............................................................................................................................................................................. 46
4.3 NETWORK SETTINGS .......................................................................................................................................................... 48
IP Address Configuration ........................................................................................................................................... 48
General Settings........................................................................................................................................................ 51
Restore Factory Defaults .......................................................................................................................................... 52
Firmware Update ..................................................................................................................................................... 54
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 2
Ethernet I/O Modules
5.
4.4 I/O SETTINGS ................................................................................................................................................................... 55
DO Control ................................................................................................................................................................ 55
DI/DO Configuration ................................................................................................................................................ 56
4.5 SYNC............................................................................................................................................................................... 59
DIO Synchronization .................................................................................................................................................. 59
4.6 PWM ............................................................................................................................................................................ 61
PWM Configuration .................................................................................................................................................. 61
4.7 PAIR .............................................................................................................................................................................. 63
Pair-Connection Settings .......................................................................................................................................... 63
4.8 FILTER ........................................................................................................................................................................... 66
Filter Settings ........................................................................................................................................................... 66
4.9 MONITOR ....................................................................................................................................................................... 68
4.10 CHANGE PASSWORD ...................................................................................................................................................... 68
4.11 LOGOUT ....................................................................................................................................................................... 69
6.
5.1 ONE MODULE POLLING THE REMOTE DI/DO (1-TO-1, POLLING MODE) ............................................................................. 70
Polling Mode ............................................................................................................................................................. 72
Push Mode................................................................................................................................................................. 73
5.2 TWO MODULES PUSHING THE LOCAL DI TO EACH OTHER (1-TO-1, PUSH MODE) .................................................................. 74
5.3 SEVERAL MODULES POLLING THE REMOTE DI (M-TO-1) (POLLING MODE)......................................................................... 77
5.4 SEVERAL MODULES PUSHING THE LOCAL DI (M-TO-1) (PUSH MODE) ................................................................................ 80
I/O PAIR CONNECTION APPLICATIONS .........................................................................................................70
MODBUS INFORMATION .................................................................................................................................83
6.1 WHAT IS MODBUS TCP/IP? ............................................................................................................................................ 84
6.2 MODBUS MESSAGE STRUCTURE ........................................................................................................................................ 84
01(0x01) Read the Status of the Coils (Readback DOs) ........................................................................................... 88
02(0x02) Read the Status of the Input (Read DIs) .................................................................................................. 90
03(0x03) Read the Holding Registers (Readback AOs) ........................................................................................... 92
04(0x04) Read the Input Registers (Read AIs) ........................................................................................................ 94
05(0x05) Force a Single Coil (Write DO) .................................................................................................................... 96
06(0x06) Preset a Single Register (Write AO) ......................................................................................................... 98
15(0x0F) Force Multiple Coils (Write DOs) ............................................................................................................ 100
16(0x10) Preset Multiple Registers (Write AOs) ................................................................................................... 102
6.3 MODBUS REGISTER TABLE ............................................................................................................................................. 104
6.3.1
Common Functions ................................................................................................................................... 104
6.3.2
Specific Functions ..................................................................................................................................... 106
7.
RELATED TOOLS ............................................................................................................................................ 111
7.1 LABVIEW .................................................................................................................................................................... 111
7.2 OPC SERVER ................................................................................................................................................................ 111
7.3 SCADA ........................................................................................................................................................................ 112
APPENDIX: TROUBLESHOOTING ..............................................................................................................................114
HOW DO I RESTORE THE WEB PASSWORD FOR THE MODULE TO THE FACTORY DEFAULT PASSWORD? ......................... 114
APPENDIX B: REVISION HISTORY................................................................................................................................116
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 3
Ethernet I/O Modules
Packing List
The shipping package includes the following items:
or
tET/tPET Series x 1
Quick Start x 1
Note
If any of these items are missing or damaged, please contact the local distributor for more information.
Save the shipping materials and cartons in case you need to ship the module in the future.
More Information
 Documentation
CD:\NAPDOS\tpet\Document
http://ftp.icpdas.com/pub/cd/tinymodules/napdos/tpet/document/
 Firmware
CD:\NAPDOS\tpet\Firmware
http://ftp.icpdas.com/pub/cd/tinymodules/napdos/tpet/firmware/
 Software
CD:\NAPDOS\Software
http://ftp.icpdas.com/pub/cd/tinymodules/napdos/software/
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 4
Ethernet I/O Modules
1. Introduction
The tET/tPET and PETL-7060 series of devices are IP-based Ethernet I/O monitoring and control
modules that provide networking ability and a variety of digital I/O functions. The modules can be
remotely controlled through a 10/100 M Ethernet network using the Modbus TCP/UDP protocol.
Modbus has become a de facto standard communications, and is now the most commonly available
means of connecting industrial electronic devices. This makes the tET/tPET and PETL-7060series
perfect for integration with HMI, SCADA, PLC and other software systems.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 5
Ethernet I/O Modules
1.1 Product Information
1.1.1 Ethernet IO Module Series
The tET/tPET and PETL-7060 series of Ethernet I/O modules support a range of I/O formats, such as
photo-isolated digital input, relay contact, PhotoMOS relay, and open-collector output, etc.
The table below provides a description of each model.
DC Digital Input
tET-P6
Tiny Ethernet module with 6-channel digital input (Wet Contact)
tET-PD6
Tiny Ethernet module with 6-channel digital input (Dry Contact)
tPET-P6
Tiny Ethernet module with PoE and 6-channel digital input (Wet Contact)
tPET-PD6
Tiny Ethernet module with PoE and 6-channel digital input (Dry Contact)
DC Digital Output
tET-C4
Tiny Ethernet module with 4-channel digital output (NPN, Sink)
tET-A4
Tiny Ethernet module with 4-channel digital output (PNP, Source)
tPET-C4
Tiny Ethernet module with PoE and 4-channel digital output (NPN, Sink)
tPET-A4
Tiny Ethernet module with PoE and 4-channel digital output (PNP, Source)
DC Digital Input and Output
tET-P2C2
Tiny Ethernet module with 2-channel digital input and 2-channel digital output
(NPN, Sink)
tET-P2A2
Tiny Ethernet module with 2-channel digital input and 2-channel digital output
(PNP, Source)
tPET-P2C2
Tiny Ethernet module with PoE, 2-channel digital input and 2-channel digital
output (NPN, Sink)
tPET-P2A2
Tiny Ethernet module with PoE, 2-channel digital input and 2-channel digital
output (PNP, Source)
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 6
Ethernet I/O Modules
Power Relay Output
tET-P2R2
Tiny Ethernet module with 2-channel digital input(Wet Contact) and 2-channel
Form A power relay output
tET-PD2R1
Tiny Ethernet module with 2-channel digital input(Dry Contact) and 1-channel
Form A power relay output
tPET-P2R2
Tiny Ethernet module with PoE, 2-channel digital input(Wet Contact) and
2-channel Form A power relay output
tPET-PD2R1
Tiny Ethernet module with PoE, 2-channel digital input(Dry Contact) and
1-channel Form A power relay output
PETL-7060
Ethernet module with 6-channel
6-channelForm A power relay output
digital
input(Wet
Contact)
and
PhotoMOS Relay Output
tET-P2POR2
Tiny Ethernet module with 2-channel digital input(Wet Contact) and 2-channel
Form A PhotoMOS relay output
tET-PD2POR2
Tiny Ethernet module with 2-channel digital input(Dry Contact) and 2-channel
Form A PhotoMOS relay output
tPET-P2POR2
Tiny Ethernet module with PoE, 2-channel digital input(Wet Contact) and
2-channel Form A PhotoMOS relay output
tPET-PD2POR2
Tiny Ethernet module with PoE, 2-channel digital input(Dry Contact) and
2-channel Form A PhotoMOS relay output
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 7
Ethernet I/O Modules
1.1.2 Selection Guide
Model
Ethernet
I/O Specifications
PoE
D/I (Type)
6-channel
tET-P6
tPET-P6
tET-PD6
tPET-PD6
tET-C4
tPET-C4
-
tET-A4
tPET-A4
-
tET-P2C2
tPET-P2C2
tET-P2A2
tPET-P2A2
tET-P2POR2
tET-PD2POR2
tPET-P2POR2
tPET-PD2POR2
tET-P2R2
tPET-P2R2
tET-PD2R1
tPET-PD2R1
-
PETL-7060
ICP DAS CO., LTD.
(Wet Contact)
6-channel
(Dry Contact)
D/O (Type)
TCP
Yes
Yes
Yes
(Sink)
4-channel
(Source)
(Sink)
2-channel
2-channel
(Wet Contact)
(Source)
(Dry Contact)
10/100 M
4-channel
(Wet Contact)
2-channel
Isolation
-
2-channel
(Wet Contact)
Modbus
-
2-channel
2-channel
Ethernet
2-channel
Form A
PhotoMos Relay
2-channel
Form A
PhotoMos Relay
2-channel
2-channel
(Wet Contact)
Form A Relay
2-channel
1-channel
(Dry Contact)
Form A Relay
6-channel
6-channel
(Wet Contact)
Form A Relay
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 8
Ethernet I/O Modules
1.1.3 Comparison of PETL/tET/tPET Module
The tPET and PETL-7060 series features true IEEE 802.3af-compliant (classification, Class 1) Power
over Ethernet (PoE) functions. Now, not only can data be carried through an Ethernet cable, but
power can also be provided. This feature makes installation of tPET series modules a straightforward
task. Imagine no more unnecessary wires with only an Ethernet cable required in order to take care of
everything in the field.
The tET/tPET and PETL-7060 series also features a built-in web server that allows basic configuration,
I/O monitoring and I/O control to be performed by simply using a web browser meaning that remote
control of your modules is as easy as surfing the Internet. In addition, tET/tPET and PETL-7060 series
modules support the Modbus TCP/UDP protocols, ensuring perfect integration with SCADA software.
Industrial PoE Solutions
When using PoE devices such as the tPET series, you can incorporate the ICP DAS “PoE” switch, the
“NS-205PSE”, as the power source. The NS-205PSE automatically detects any connected devices,
whether they are PoE devices or not. This mechanism ensures that the NS-205PSE will function
simultaneously with both PoE and non-PoE devices.
Note that when acting as a power source for a PoE device, the NS-205PSE requires a power input
ranging from +46 VDC to +55 VDC.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 9
Ethernet I/O Modules
More Information
All tET series modules can only be powered using a+12 VDC to +48 VDC power supply connected
through a removable terminal block.
In contrast, tPET and PETL-7060 series modules offer two methods of supplying power. The first is
through the Ethernet via a PoE switch; the second is through a removable terminal block via an
external power source. The external power supply should be in the range of +12 VDC to 48 VDC. The
reason for including the second method is to provide a redundant power input feature. tPET and
PETL-7060 series modules also indicate an LED that indicates whether the power is being supplied by
the PoE switch or not.
tPET
PETL-7060
CPU
32-bit ARM
Ethernet
80186
10/100 M, PoE
Modbus TCP/UDP
Yes
Web Configuration
Yes
Web HMI
Multi-client
Simplified
Yes
Yes (Max. Connections: 5)
IP Filter
Yes
DI as Counter
Frequency
Measurement
I/O Pair-connection
PWM
32-bit, 3.5 kHz
32-bit, 500 Hz
Yes (3.5 kHz Max.)
-
Yes (Poll/Push Mode)
Yes (Poll Mode)
Yes (100 Hz Max.)
-
Yes (CPU, Host)
Yes (Module, Host)
Dual-Watchdog
ESD Protection
Form Factor
Yes (Max. Connections: 12)
Yes (white list)
Latched DI
Surge Protection
PET-7000
+/- 4 kV
-
+/- 0.5 kV
Tiny Size
Palm Size
Remarks
Cost-effective
-
Note: tET = tPET without PoE functionality.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 10
Ethernet I/O Modules
1.2 Features
 Built-in Web Server
Each tET/tPET/PETL series module contains a built-in web server
that allows users to easily configure, monitor and control the
module from a remote location using a web browser.
 Modbus Protocol
The Modbus TCP/UDP slave function on the Ethernet port can be used to provide data to remote
SCADA software.
 All-in-one Module
A variety of I/O components are available on multiple channels in a single module, which provides the
most cost effective I/O usage and enhances the performance of I/O operations.
 Automatic MDI/MDI-X Detection for Plug-and-Play
The RJ-45 port supports automatic sensing of MDI/MDI-x switching that can
automatically detect the type of connection being used by the Ethernet device
without requiring special straight or crossover cables.
 Built-in Dual Watchdog
The Dual Watchdog consists of a CPU Watchdog (for hardware functions) and a
Host Watchdog (for software functions).
The CPU Watchdog will automatically reset it-self if the built-in firmware
encounters an abnormal situation.
If there is no communication between the module and the host (PC or PLC) for a specified period of
time (i.e., the Watchdog timeout), the Host Watchdog will set the digital output based on a
predefined safe-value.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 11
Ethernet I/O Modules
 Built-in Multi-Function I/O
1. All Digital Output modules provide:
 A Power-on Value (On boot up, the digital output value is set as the Power-on value)
 A Safe Value (If Modbus TCP communication is lost for a certain period, the digital output
Value will be set as the user-defined safe value)
 A PWM Function: The digital output channels on PETL/tET/tPET series include a PWM (pulse
generation) function that can be used to set different frequencies (50 or 100 Hz Max.) and
duty cycles for each digital output channel. In addition, the two digital output channels can
work either independently or simultaneously. The term “High Duty Cycle” describes the
duration of 'on' time in proportion to the regular interval or 'period' of time. Similarly, the
term “Low Duty Cycle” corresponds to the duration of the 'off' time. Consequently, it is not
necessary to keep switching from ON to OFF from remote a controller. In this way, the
tET/tPET/PETL series module reduces the complexity required for the control system
and enhances timing accuracy.
2. All Digital Input modules provide:
 Digital input channels that can also be used as 32-bit high speed (3.5 kHz) counters.
 High/Low Latched Status Commands: The modules provide commands to read the status of
any digital input channels that are latched high or latched low. The following is an example
that shows the usefulness of the latched digital input. If
we wish to read a key stroke from a key switch
connected to the digital input channel of a module, the
input signal of the key stroke is a pulse signal as shown
in the figure.
If we just use the read digital input status command to read the signal and we cannot send
the command during the B period due to some reasons, then we will lose the key stroke
information. However, with the read latched digital input command, we can still get the key
stroke information even we are not able to send command in B period.

Frequency Measurement: tET/tPET/PETL series modules also provide a
frequency measurement function that retrieves the digital input counter value at specific
times and calculates the frequency. Rather than polling via a remote host, the tET/tPET/PETL
series modules can determine the frequency directly, reducing the communication
delay caused by two ends and also improves the accuracy of the frequency measurement. In
order to applying for more applications, this module provides 3 scan modes and 4 moving
average methods for user to select the best way in their applications.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 12
Ethernet I/O Modules
 I/O Pair-Connection
The I/O Pair-connection function is used to create a digital input to digital output pair through the
Ethernet. Once the configuration is complete, the PETL/tET/tPET series modules can continuously poll
the status of a remote digital input device using the Modbus TCP protocol, and then write to the local
digital output channels in the background.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 13
Ethernet I/O Modules
2. Hardware Information
2.1 Front and Back Panel
The following is a brief overview and description of the components included in PETL/tET/tPET series
modules.
PETL-7060
tET/tPET Series










1
Ethernet Port
4
System LED Indicator
2
J1 Connector
5
J2 Connector
3
Operating Mode Switch
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 14
Ethernet I/O Modules
Ethernet Port
The PETL/tET/tPET series module are equipped with an RJ-45 jack that is used as the 10/100 Base-TX
Ethernet port and features networking capability. When an Ethernet link is detected and an Ethernet
packet is received, the Link/Act LED (Green) indicator and the10/100 M LED (Yellow) indicator will
be illuminated.
Note
The Ethernet port supports PoE (Power-over-Ethernet) functions for PETL/tPET series modules only.
J1 Connector
The type of J1 connector used depends on the type of PETL/tET/tPET series module. For more
detailed information regarding the pin assignments for the J1 Connector, please refer to Section 2.3
“Pin Assignments”.

DC Power Input:
The definition for “(R)+Vs” and “(B)GND” for use as the
power supply applies to all types of PETL/tET/tPET series
module.
Module
PETL-7060
tET/tPET
ICP DAS CO., LTD.
Pin
Name
Function
8
(R)+Vs
+12 to +48 VDC Power Input
9
(B)GND
Ground Connection
3
(R)+Vs
+12 to +48 VDC Power Input
4
(B)GND
Ground Connection
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 15
Ethernet I/O Modules

Frame Ground:
Electronic circuits are constantly vulnerable to Electrostatic Discharge (ESD), which becomes worse in
a continental climate area. PETL/tET/tPET series module feature a new design for the frame ground,
which provides a path that bypasses ESD, resulting in an enhanced ESD protection capability and
ensuring that the module is more reliable.


The frame ground (F.G.) of the tET/tPET series, as follows:
Module
Pin
Name
Function
tET/tPET
1
F.G.
Frame Ground
The frame ground (F.G.) of the PETL-7060, as follows:
The PETL-7060 controller has a metallic board attached to the
back of the plastic casing as indicated by point 1 in the figure.
When mounted to the DIN-Rail, connect the DIN-Rail to the
earth ground because the DIN-Rail is in contact with the upper
frame ground as shown in the figure, point 2.
1
2
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 16
Ethernet I/O Modules
Operating Mode Switch


Init mode: Uses factory settings and allows the firmware to be updated.
Run/Normal mode: Uses customer settings.
The operating mode switch for PETL/tET/tPET series modules is set to the Run/Normal position by
default. When updating the PETL/tET/tPET firmware, the switch should be moved from the
Run/Normal position to the Init position. The switch must then be returned to the Run/Normal
position once the update is complete.
Note
The module must be rebooted after changing operating.
PETL-7060
ICP DAS CO., LTD.
tET/tPET Series
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 17
Ethernet I/O Modules
System LED Indicator
Once power is supplied to the PETL/tET/tPET series module, the LED indicator will be illuminated as
follows:
tET/tPET Series
Function
System LED Behavior
Running Firmware
ON (Red)
Network Ready
Flashing once every 3 seconds (Red)
PoE (for tPET only)
ON (Green)
PETL-7060
Name
Function
System LED Behavior
L1
Running Firmware
ON (Red)
L2
Link/ACT (Red)
ON: Ethernet link detected
OFF: No Ethernet link detected
Flashing: Ethernet packet received
L3
10/100M(Yellow)
OFF: the speed is 10 Mbps
ON: the speed is 100 Mbps
PoE
Supply power
ON (Green)
Note
The PoE LED (Green) indicator is only applicable to PETL/tPET series modules.
J2 Connector
The J2 connector depends on the type of the PETL/tET/tPET series module. For more detailed
information regarding the pin assignments for the J2 Connector, refer to Section 2.3 “Pin
Assignments”.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 18
Ethernet I/O Modules
2.2 Specifications
2.2.1 System Specifications
Modules
tET Series
tPET Series
PETL-7060
System
CPU
32-bit MCU
Dual Watchdog
Yes
Communication
10/100 Base-TX, 8-Pin RJ-45 x1,
Ethernet Port
(Auto-negotiating, Auto-MDI/MDIX, LED Indicator)
-
PoE (IEEE 802.3af, Class 1)
LED Display
PoE Indicator
-
S1 (Green)
PoE (Green)
System Indicator
S1 (Red)
L1 (Red)
Link/Act Indicator
E1(Green)
L2 (Red)
10/100 M Indicator
E1 (Yellow)
L3 (Yellow)
52 x 27 x 98
123 x 72 x 35
Mechanical
Dimensions
(W x H x D)(mm)
Installation
DIN-Rail or Wall
DIN-Rail mounting
mounting
Environment
Operating Temperature
-25 ˚C ~ +75 ˚C
Storage Temperature
-30 ˚C ~ +80 ˚C
Humidity
10 ~ 90 % RH, non-condensing
Power Requirements
Power Input
Power Consumption
ICP DAS CO., LTD.
-
PoE: IEEE 802.3af, Class 1
Terminal Block: +12 ~ 48 VDC (non-regulated)
0.04 A @ 24 VDC for
0.03 A @ 48 VDC for
tET-P2R2
tPET-P2R2
0.05 A @ 48 VDC
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Ethernet I/O Modules
2.2.2 I/O Specifications
tET-P6/tPET-P6/tET-PD6/tPET-PD6
tET-P6
tPET-P6
Models
tET-PD6
tPET-PD6
Digital Input
Input Channels
6
Input Type (Device)
Wet Contact (Sink, Source)
Dry Contact (Source)
On Voltage Level
+10 VDC ~ +50 VDC
Close to GND
Off Voltage Level
+4 VDC max.
Open
Input Impedance
10 kΩ
-
Counters
Max. Count
4,294,967,285 (32 bits)
Min. Pulse Width
0.15 ms
Frequency Measurement
3.5 kHz (without filter)
Overvoltage Protection
+70 VDC
Isolation
3750 Vrms
Effective Distance
-
500 M Max.
tET-C4/tPET-C4/tET-A4/tPET-A4
tET-C4
tPET-C4
Models
tET-A4
tPET-A4
Digital Output
Output Channels
4
Output Type (Module)
Sink, Open Collector (NPN)
Source, Open Collector (PNP)
Output Voltage
+5 VDC ~ +30 VDC
+10 VDC ~ +40 VDC
Max. Load Current
100 mA/channel
650 mA/channel
PWM
100 Hz Max. (The High/Low duty cucle range = 5 ~ 65,535 ms)
Over-Voltage
+60 VDC
+48 VDC
Short Circuit Protection
-
Yes
Output Isolation
3750 rms
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 20
Ethernet I/O Modules
tET-P2C2/tPET-P2C2/tET-P2A2/tPET-P2A2
tET-P2C2
tPET-P2C2
Models
tET-P2A2
tPET-P2A2
Digital Input
Input Channels
2
Input Type (Device)
Wet Contact (Sink, Source)
On Voltage Level
+10 VDC ~ +50 VDC
Off Voltage Level
+4 VDC Max.
Input Impedance
10 kΩ
Counters
Max. Count: 4,294,967,285 (32 bits)
Min. Pulse Width: 0.15 ms
Frequency Measurement
3.5 kHz (without filter)
Overvoltage Protection
+70 VDC
Isolation
3750 Vrms
Digital Output
Output Channels
2
Output Type (Module)
Sink, Open Collector (NPN)
Source, Open Collector (PNP)
Output Voltage
+5 VDC ~ +30 VDC
+10 VDC ~ +40 VDC
Max. Load Current
100 mA/channel
650 mA/channel
PWM
100 Hz Max. (The High/Low duty cycle Range = 5 ~ 65,535 ms)
Over-Voltage
+60 VDC
+48 VDC
Short Circuit Protection
-
Yes
Output Isolation
3750 Vrms
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Ethernet I/O Modules
tET-P2POR2/tPET-P2POR2/tET-PD2POR2/tPET-PD2POR2
tET-P2POR2
tPET-P2POR2
Models
tET-PD2POR2
tPET-PD2POR2
Digital Input
Input Channels
2
Input Type (Device)
Wet Contact (Sink, Source)
Dry Contact (Source)
On Voltage Level
+10 VDC ~ +50 VDC
Close to GND
Off Voltage Level
+4 VDC Max.
Open
Input Impedance
10 kΩ
-
Counters
Max. Count
4,294,967,285 (32 bits)
Min. Pulse Width
0.15 ms
Frequency Measurement
Overvoltage Protection
3.5 kHz (without filter)
+70 VDC
Isolation
Effective Distance
3750 Vrms
-
500 M Max.
Relay Output
Output Channels
2
Output Type (Module)
PhotoMOS Relay, Form A
Load Voltage
60 VDC/ VAC
60 V/1.0 A (Operating Temperature -25°C ~ -40°C)
Load Current
60 V/0.8 A (Operating Temperature +40°C ~ +60°C)
60 V/0.7 A (Operating Temperature +60°C ~ +75°C)
PWM
100 Hz max. (The High/Low duty cycle range = 5 ~ 65,535 ms)
Turn ON Time
1.3 ms (Typical)
Turn Off Time
0.1 ms (Typical)
Output Isolation
3000 Vrms
Note
Because of the characteristics of the relay functions, it is recommended that the PWM on
t(P)ET-P(D)2POR2/ t(P)ET-P2R2/ t(P)ET-PD2R1/ PETL-7060 series modules (i.e., modules with relay
functions) is not used for extended periods of time.
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PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 22
Ethernet I/O Modules
tET-P2R2/tPET-P2R2/tET-PD2R1/tPET-PD2R1
tET-P2R2
tPET-P2R2
Models
tET-PD2R1
tPET-PD2R1
Digital Input
Input Channels
2
Input Type (Device)
On Voltage Level
Wet Contact (Sink, Source)
+10 VDC ~ +50 VDC
Dry Contact (Source)
Close to GND
Off Voltage Level
Input Impedance
+4 VDC Max.
10 kΩ
Open
-
Counters
Max. Count
Min. Pulse Width
4,294,967,285 (32 bits)
0.15 ms
Frequency Measurement
3.5 kHz (without filter)
Overvoltage Protection
Isolation
Effective Distance
Relay Output
Output Channels
Output Type (Module)
Output Voltage Range
Max. Load Current
Operate Time
Release Time
PWM
Electrical Life
(Resistive load)
Mechanical Life
Output Isolation
+70 VDC
-
3750 Vrms
500 M Max.
2
1
Power Relay, Form A (SPST N.O.)
250 VAC/30 VDC
5.0 A/channel
6 ms
3 ms
50 Hz max. (The High/Low duty cycle range = 10 ~ 65,535 ms)
VED
UL
5 A 250 VAC 30,000 ops (10 ops/minute) at 75 °C
5 A 30 VDC 70,000 ops (10 ops/minute) at 75 °C
5 A 250 VAC/30 VDC 6,000 ops
3 A 250 VAC/30 VDC 100,000 ops
20,000,000 ops. At no load (300 ops./ minute)
3000 Vrms
Note
Because of the characteristics of the relay functions, it is recommended that the PWM on
t(P)ET-P(D)2POR2/ t(P)ET-P2R2/ t(P)ET-PD2R1/ PETL-7060 series modules (i.e., modules with relay
functions) is not used for extended periods of time.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 23
Ethernet I/O Modules
PETL-7060
Models
PETL-7060
Digital Input
Input Channels
6
Input Type (Device)
On Voltage Level
Wet Contact (Sink, Source)
+10 VDC ~ +50 VDC
Off Voltage Level
Input Impedance
+4 VDC Max.
10 kΩ
Counters
Max. Count
Min. Pulse Width
Frequency Measurement
3.5 kHz (without filter)
Overvoltage Protection
Isolation
Relay Output
Output Channels
Output Type (Module)
Output Voltage Range
Max. Load Current
Operate Time
Release Time
PWM
Electrical Life
(Resistive load)
Mechanical Life
Output Isolation
4,294,967,285 (32 bits)
0.15 ms
+70 VDC
3750 Vrms
6
Power Relay, Form A (SPST N.O.)
250 VAC/30 VDC
5.0 A/channel
6 ms
3 ms
50 Hz max. (The High/Low duty cycle range = 10 ~ 65,535 ms)
VED
UL
5 A 250 VAC 30,000 ops (10 ops/minute) at 75 °C
5 A 30 VDC 70,000 ops (10 ops/minute) at 75 °C
5 A 250 VAC/30 VDC 6,000 ops
3 A 250 VAC/30 VDC 100,000 ops
20,000,000 ops. At no load (300 ops./ minute)
3000 Vrms
Note
Because of the characteristics of the relay functions, it is recommended that the PWM on
t(P)ET-P(D)2POR2/ t(P)ET-P2R2/ t(P)ET-PD2R1/ PETL-7060 series modules (i.e., modules with relay
functions) is not used for extended periods of time.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 24
Ethernet I/O Modules
2.3Pin Assignments
tET-P6/tPET-P6/tET-PD6/tPET-PD6
: I/O Address Mapping
: Counter Address Mapping
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Ethernet I/O Modules
tET-C4/tPET-C4/tET-A4/tPET-A4
: I/O Address Mapping
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PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 26
Ethernet I/O Modules
tET-P2POR2/tPET-P2POR2/tET-P2R2/tPET-P2R2
: I/O Address Mapping
: Counter Address Mapping
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PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 27
Ethernet I/O Modules
tET-PD2POR2/tPET-PD2POR2
: I/O Address Mapping
: Counter Address Mapping
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Ethernet I/O Modules
tET-PD2R1/tPET-PD2R1
: I/O Address Mapping
: Counter Address Mapping
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 29
Ethernet I/O Modules
tET-P2C2/tPET-P2C2/tET-P2A2/tPET-P2A2
: I/O Address Mapping
: Counter Address Mapping
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 30
Ethernet I/O Modules
PETL-7060
: I/O Address Mapping
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Ethernet I/O Modules
2.4 Wiring Connections
2.4.1

Input Wiring
tET-P6/ tPET-P6,tET-P2C2/ tPET-P2C2,
tET-P2A2/tPET-P2A2,tET-P2POR2/tPET-P2POR2, tET-P2R2 /tPET-P2R2, PETL-7060
Input Type
Readback as 1
Readback as 0
+ 10 ~ +50 VDC
OPEN or <4 VDC
+ 10 ~ +50 VDC
OPEN or <4 VDC
Sink
Source

tET-PD6/tPET-PD6, tET-PD2POR2/tPET-PD2POR2, tET-PD2R1/tPET-PD2R1:
Input Type
Readback as 0
Readback as 1
Relay OFF
Relay ON
Dry Contact
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Ethernet I/O Modules
2.4.2

Output Wiring
tET-C4/tPET-C4, tET-P2C2/tPET-P2C2
Output Type
Readback as 1
Readback as 0
Relay ON
Relay OFF
Drive Relay
Resistance Load

tET-A4/tPET-A4, tET-P2A2/tPET-P2A2
Output Type
ON State
Readback as 1
OFF State
Readback as 0
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Ethernet I/O Modules

tET-P2R2/tPET-P2R2, tET-PD2R1/tPET-PD2R1, PETL-7060
Output Type
Readback as 1
Readback as 0
Relay ON
Relay OFF
Relay Output

tET-P2POR2/tPET-P2POR2, tET-PD2POR2/tPET-PD2POR2
Output Type
Readback as 1
Readback as 0
Relay ON
Relay OFF
Form A
Relay Contact
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PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 34
Ethernet I/O Modules
2.5 Dimensions

The PETL-7060 dimensions are in millimeters.
Rear View
Front View
Top View
Din-Rail Mounting Bracket
ICP DAS CO., LTD.
SideView
View
Side
Bottom View
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 35
Ethernet I/O Modules

The tET/tPET series dimensions are in millimeters.
Rear View
Front View
Top View
Left Side View
ICP DAS CO., LTD.
Right Side View
Bottom View
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 36
Ethernet I/O Modules
3. Getting Started
This chapter provides a basic overview of how to install, configure and operate your PETL/tET/tPET
series module.
3.1 Mounting the Module
The PETL/tET/tPET series module can be mounted by attaching the bottom of the chassis to a DIN-Rail,
or the wall or it can be piggybacked to another module.
DIN-Rail Mounting
The PETL/tET/tPET series modules include simple rail clips
on the bottom of the chassis that allow them to be reliably
mounted on a DIN-Rail or a wall, or they can be piggybacked to
another module. For more detailed information regarding DIN-Rail
Mounting, refer to the illustration in figure below.
Mounting on a DIN-Rail
Dismounting from a DIN-Rail






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Ethernet I/O Modules
Mountable DIN-Rail Models
Din-Rail mounts are available in three sizes, and enable a variety of ICP DAS devices to be mounted.
Each is made of stainless steel and has a ground wire attached at one end.
Part Number
Maximum Number of Modules
Dimensions
DRS-125
2
125 mm x 35 mm
DRS-240
3
240 mm x 35 mm
DRS-360
5
360 mm x 35 mm
Piggyback Mounting (for PETL-7060 only)
PETL-7060 module contains holes on each side to enable piggy back
mounting.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 38
Ethernet I/O Modules
3.2 Configuring the Boot Mode
All PETL/tET/tPET series modules have two
operating modes that can be selected by using
the switch mechanism incorporated on the
chassis. Note that the module must be rebooted
after changing the operating mode.
Init Mode
Init Mode should only be selected when updating the firmware or while
troubleshooting. This mode forces the module to use the default factory
settings.
Run/Normal Mode
Run/Normal Mode is the default operating mode and should be used in most
cases.
Note
Be sure to return the switch to the Run/Normal position once any firmware update is complete.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 39
Ethernet I/O Modules
3.3 Connecting to a Network, a PC and a Power
Supply
All PETL/tET/tPET series module are equipped with an RJ-45 Ethernet port to allow connection to an
Ethernet hub/switch or a PC.
Uses Non-PoE Switch
Uses PoE Switch (for PETL/tPET only)
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Ethernet I/O Modules
3.4 Using the eSearch Utility to Assign a New IP
The eSearch Utility is a useful tool that provides a quick and easy method of configuring the Ethernet
settings for PETL/tET/tPET series module from a PC.
Step 1: Download and install the eSearch Utility software, and open the eSearch Utility
eSearch Utility can be obtained either from the companion CD at:
CD:\Napdos\Software\eSearch\
Or from the ICP DAS web site at:
http://ftp.icpdas.com/pub/cd/tinymodules/napdos/software/esearch/
Step 2: Click the “Search Servers” button to search for your module
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Ethernet I/O Modules
Step 3: Double-click the name of the module to open the server configuration dialog.
All PETL/tET/tPET series modules are IP-based devices that may not be suitable for your network using
the default IP address. Therefore, you must first assign a new IP address to the PETL/tET/tPET series
module depending on your network settings.
The factory default IP settings are:
IP Address: 192.168.255.1; Subnet Mask: 255.255.0.0; Gateway: 192.168.0.1.
Step 4: Assign a new IP address and then click the “OK” button.
Contact your Network Administrator to obtain the correct network configuration information. Modify
the network settings as necessary and then click the “OK” button. The PETL/tET/tPET series module
will use the new settings immediately.
ICP DAS CO., LTD.
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Ethernet I/O Modules
Step 5: Wait for 2 seconds and then click the “Search Servers” button again.
Ensure that the PETL/tET/tPET series module is operating correctly using the new configuration.
ICP DAS CO., LTD.
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Ethernet I/O Modules
4. Web Configuration
All PETL/tET/tPET series module contain an advanced embedded web configuration system that
provides I/O accessibility to the PETL/tET/tPET series module via a web browser.
4.1 Logging in to the Web Server
You can access the embedded PETL/tET/tPET series web server from any computer that has an
Internet connection.
Step 1: Open a new browser window.
Open a standard web browser. For example, Mozilla Firefox, Google Chrome
and Internet Explorer are reliable and popular internet browsers that can be
used to configure PETL/tET/tPET series module.
Note that if you intend to use Internet Explorer, ensure that the cache to functions is disabled in
order to avoid browser access errors. Detailed information how to do this can be found in “FAQ 01:
How to avoid a browser access error that causes a blank page to be displayed when using IE”.
Step 2: Enter the URL address of the PETL/tET/tPET web server.
Ensure that you have correctly configured the network settings for the PETL/tET/tPET series module,
or refer to Section 3.4 “Using the eSearch Utility to Assign a New IP”.
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Ethernet I/O Modules
Step 3: Enter the password
After entering the IP address, the main login dialog page will be displayed prompting you to enter a
password. The factory default password is “Admin”. Click the “Submit” button to continue.
Factory Default
Password: Admin
Step 4: Login to the PETL/tET/tPET web server
After logging into the PETL/tET/tPET web server, the main page will be displayed.
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Ethernet I/O Modules
4.2 Home
The Home link connects to the main page, which contains three parts.
The first part of this page provides basic information about the PETL/tET/tPET hardware and software.
The software and hardware information section includes information related to the Model Name,
the current Firmware version, the IP Address, the current position of the Initial Switch, the Alias, the
MAC Address, and the TCP Port, and the System Timeout values. If you update the firmware for the
PETL/tET/tPET series module, this page can be used to check the version information of the
PETL/tET/tPET software.
The second section provides information related to the current status of pair-connection settings and
Digital Output Control. Note: User can click on the DO image to switch the output state.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 46
Ethernet I/O Modules
The third section provides details related the status of the I/O pair-connections.
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Ethernet I/O Modules
4.3 Network Settings
Clicking the Network tab will display the IP Address Configuration page allowing you verify the
current settings and configure the IP Address parameters, configure the general parameters and
restore the default settings for the PETL/tET/tPET series module, each of which will be described in
more detail below.
IP Address Configuration
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Ethernet I/O Modules
The following table provides an overview of the parameters contained in the IP Address configuration
section:
Item
Description
Static IP: If there is no DHCP server installed in your network, you can configure
the network settings manually. Refer to Section “Manual Configuration” for
Address Type
more details.
DHCP: Dynamic Host Configuration Protocol (DHCP) is a network application
protocol that automatically assigns an IP address to each device. Refer to
Section “Dynamic Configuration” for more details.
Static IP Address
Each PETL/tET/tPET module connected to the network must have its own
unique IP address. This parameter is used to assign a specific IP address.
This parameter is used to assign the subnet mask for the PETL/tET/tPET module.
Subnet Mask
The subnet mask indicates which portion of the IP address is used to identify
the local network or subnet.
This parameter is used to assign the IP Address of the Gateway to be used by
Default Gateway
the PETL/tET/tPET module. A Gateway (or router) is a device that is used to
connect an individual network to one or more additional networks.
MAC Address
This parameter is used to set the User-defined MAC address, which must be in
the format FF-FF-FF-FF-FF-FF.
Modbus TCP Slave
Local Modbus TCP port
Local Modbus Net ID
Update Settings
ICP DAS CO., LTD.
This parameter is used to set the local port to be used by the Modbus slave
device. The default value is 502.
This parameter is used to set the Network ID to be used by the Modbus slave
device. The default value is 1.
Click this button to save the revised settings to the PETL/tET/tPET module.
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Ethernet I/O Modules
Dynamic Configuration
Dynamic configuration is very easy to perform. If a DHCP server is connected to you network, a
network address can be dynamically configured by using the following procedure:
Step 1: Select “DHCP” from the Address Type drop-down menu.
Step 2: Click the “Update Settings” button to complete the configuration.


Manual Configuration
When using manual configuration, the network settings should be assigned in the following manner:
Step 1: Select “Static IP” from the Address Type drop-down menu.
Step 2: Enter the relevant details in the respective network settings fields.
Step 3: Click the “Update Settings” button to complete the configuration.



ICP DAS CO., LTD.
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Ethernet I/O Modules
General Settings
The following table provides an overview of the parameters contained in the General Settings section:
Item
Ethernet Speed
System Timeout
(Network Watchdog)
TCP Timeout (Seconds)
UDP Configuration
Web Auto-logout
HTTP Port
Alias Name
Update Settings
ICP DAS CO., LTD.
Description
This parameter is used to set the Ethernet speed. The default value is Auto
(Auto = 10/100 Mbps Auto-negotiation).
This parameter is used to configure the system timeout value. If there is no
activity on the network for a certain period of time, the system will be
rebooted based on the configured system timeout value.
This parameter is used to configure the TCP timeout value. If Modbus TCP
communication is idle for a certain period of time, the system will cut off the
connection.
This parameter is used to enable or disable UDP configuration function.
This parameter is used to configure the automatic logout value. If there is no
activity on the web server for a certain period of time, the current user
account will automatically logged out.
This parameter is used to assign specific a HTTP port of PETL/tET/tPET module.
The PETL/tET/tPET module needs to be restarted when the HTTP port is
changed. You need manually type the new HTTP port in the address bar of the
browser. The default is 80.
For example: if the HTTP port is set to 81, then enter the “IP address:HTTP
port” (10.0.8.123:81).
This parameter is used to assign an alias name for each PETL/tET/tPET module
to assist with easy identification.
Click this button to save the revised settings to the PETL/tET/tPET module.
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Ethernet I/O Modules
Restore Factory Defaults

Restore all options to their factory default states
To reset all parameters to their original factory default settings, use the following procedure:
Step 1: Click the “Restore Defaults” button to reset the configuration.
Step 2: Click the “OK” button in the message dialog box.
Step 3: Check whether the module has been reset to the original factory default settings for use with
the eSearch Utility. Refer to Section 3.4 Using the eSearch Utility to assign a new IP”.



The following table provides an overview of the factory default settings:
Factory Default Settings
IP Address
192.168.255.1
Gateway Address
192.168.0.1
Subnet Mask
255.255.0.0
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Ethernet I/O Modules

Forced Reboot
The Forced Reboot function: can be used to force the PETL/tET/tPET module to reboot or to remotely
reboot for the device. After the PETL/tET/tPET module has rebooted, the original login screen will be
displayed requesting that you enter your Login Password before continuing.
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Ethernet I/O Modules
Firmware Update
Firmware update requires initialization and local network operations. Traditional firmware update
requires adjusting the Init/Run Switch and reboots the module manually for the initialization of
firmware update, while new firmware allows user to initialize the module via web interface without
adjusting the hardware switch. Initialization via web is useful when module is installed in remote site
and can be accessed by a remote PC via TeamViewer.
Note: If the remote firmware update is failed, then the traditional firmware update (Local) is
required to make the module working again.
For detailed information about how to remote update the Firmware for the PETL/tET/tPET module,
refer to the tPET_PETL_Firmware_Update_vxxx_en.pdf. The location of the user manual on the CD
and the download address are shown below:
CD:\\ NAPDOS\tPET\Firmware\
http://ftp.icpdas.com/pub/cd/tinymodules/napdos/tpet/firmware/
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4.4 I/O Settings
Clicking the I/O Settings tab will display the DO Control and DI/DO Configuration page allowing you
configure the Digital Input and Digital Output parameters for the PETL/tET/tPET module. This page
including Digital Output control, DI/DO Configuration, etc., each of which will be described in more
detail below.
DO Control
The following table provides an overview of the parameters contained in the DO Control section:
Item
Description
Set DO value
This parameter is used to manually assign a specific a value for the DO.
Update Settings
Click this button to save the revised settings to the PETL/tET/tPET module.
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DI/DO Configuration
The following table provides an overview of the parameters contained in the DI/DO Configuration
section:
Item
Description
Digital Output
Host/Slave Watchdog
Timeout
This parameter is used to configure the Host Watchdog timeout value. If there
is no Modbus TCP communication activity for the specified period (the
timeout), then the Host Watchdog will activate an alarm.
Enable Safe Value
(Enable Watchdog)
This parameter is used to enable the watchdog on each DO channels.
Safe Value
Power-On Value
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This parameter is used to define the DO safe value for the PETL/tET/tPET
module. If the Host Watchdog alarm is activated, the DO will be set to the
user-defined safe value.
This parameter is used to define the DO Power-on value. On boot up, the DO is
set to the user-defined Power-on value.
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Digital Input
Enable Latched DI
Clear Latched Status (High)
Clear Latched Status (Low)
DI Filter Level
This parameter is uses to enable the latch function on all DI channels. The
status of the DI will be recorded if it has been flagged as either high or low.
0 = Disable All; 1 = Enable All
This parameter is used to clear the status of all high latched D/I.
0 = No Operation; 1 = Clear All
This parameter is used to clear the status of all low latched D/I.
0 = No Operation; 1= Clear All
The DI filter is a function that eliminates high-frequency noise from inputs.
Settings range value: 1 ~ 6500 (ms); 0 = Disable (Default).
Refer to “FAQ004_What is Digital-Input Filter (DI Filter)”for more detailed
information.
Digital Counter
Enable Digital Counter
This parameter is used to enable the digital counter on each DI channels.
Clear Digital Counter
This parameter is used to clear the values of each DI counters.
Preset Counter Value
This parameter is used to set the default value for each DI counters.
Frequency Measurement by DI
Enable
Frequency Measurement
Scan Mode
This parameter is used to enable the frequency measurement function on
each DI channels.
This parameter is used to define the scan mode for the frequency
measurement.
1000 ms:This mode provides a normal update rate and normal accuracy.
The acceptable frequency range for the input signal is 1 Hz to 3.5 kHz (± 1 Hz
error).
This mode can be used when the pulse width (signal source) contains small
errors, since the measurement is based on the pulse count.
100 ms:This mode provides fast update rate, but the accuracyis low.
The acceptable frequency range for the input signal is 100 Hz to 3.5 kHz (± 10
Hz error).
This mode can be used when the pulse width (signal source) contains small
errors, since the measurement is based on the pulse count.
Single-pulse:This mode provides the highest accuracy but can only be used for
stable signal.
The data update rate depends on the signal frequency and the acceptable
signal frequency range for the input signal is 0.01 Hz to 3.5 kHz (± 0.01 Hz
error).
This mode can only be used when the pulse width (signal source) is stable,
since the measurement is based on the width of a single pulse.
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Moving Average
1 ==> No Average is used
2 ==>Uses the average of 2 continuous sample values
4 ==>Uses the average of 4 continuous sample values
8 ==>Uses the average of 8 continuous sample values
Universal DIO
Dynamic: Dynamic I/O types based on DO request.
Force DI/DO Mode
Static: Static I/O type by configuration (web or Modbus).
(For ET-2254 only)
This parameter is used to set the Universal DIO channels to DI or DO Port. 1
==> DI; 0 ==> DO
Update Settings
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Click this button to save the revised settings of DI/DO configuration to the
PETL/tET/tPET module.
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4.5 Sync
Clicking the Sync tab will display the DIO Synchronization page allowing you configure the
Synchronous DIO, Min-switching time of DO and Auto-off Time of DO for the PETL/tET/tPET series
module, each of which will be described in more detail below.
DIO Synchronization
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The following table provides an overview of the parameters contained in the DIO Synchronization
section:
Item
Description
Synchronous DIO (Local Mirror)
Level Sync (DO = DI)
This parameter is used to enable the synchronization operation in Digital
Input/Output function.
Rising Active (DO = ON)
This parameter is used to enable rising active in Digital Input function.
When the specified DI state changed from OFF to ON, the corresponding
DO will be set to ON.
Falling Active (DO = ON)
This parameter is used to enable falling active in Digital Input function.
When the specified DI state changed from ON to OFF, the corresponding
DO will be set to ON.
Additional Controls
Min-Switch Time of DO
(0 to 65535 Seconds)
This parameter is used to set the minimum switching time between the ON
and OFF state of the Digital Output. This protects some machines from
being damaged by too many ON/OFF switches in a short time.
Auto-off Time of DO
(0 to 65535 Seconds)
This parameter is used to set the auto-off time of the Digital Output. If the
Digital Output is ON, the Digital Output will be auto-off based on the
configured time value.
Update Settings
Click this button to save the revised settings of DIO configuration to the
PETL/tET/tPET module.
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4.6 PWM
Clicking the PWM tab will display the PWM Configuration page allowing you enable and configure the
PWM parameters for the PETL/tET/tPET device, including the PWM Alarm and duty cycle, etc., each of
which will be described in more detail below.
PWM Configuration
The following table provides an overview of the parameters contained in the PWM Configuration
section:
Item
Description
Default Value
Enable PWM
This parameter is used to enable the PWM output function.
0
Enable PWM Alarm
This parameter is used to enable the PWM output alarm function.
0
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Item
Description
Default Value
This parameter is used to set the duty cycle for the DO channels.
Two values are required for each DO channel.
Duty Cycle
The first value is the high pulse width, while the second is the low
pulse width. The duty cycle is in 1 ms units, and the resolution is
approximately 5 ms. (5 to 65535 ms). A value of 0 will disable the
duty cycle functions for that channel.
1000 (ms)
Refer to “FAQ: Can tET/tPET Modules achieve a PWM Output
Accuracy of less than 1 ms” for more detailed information.
Update Settings
Click this button to save the revised settings to the PETL/tET/tPET module.
Note
Because of the characteristics of the relay functions, it is recommended that the PWM on
t(P)ET-P(D)2POR2/t(P)ET-P2R2/t(P)ET-PD2R1/PETL-7060 series module (i.e., modules with relay functions) is not
used for extended periods of time.
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4.7 Pair
Clicking the Pair tab will display the pair-connection Settings page allowing you enable and configure
the DI-to-DO pair connections for the PETL/tET/tPET module, which will be described in more detail
below.
Pair-Connection Settings
The I/O pair connection function is a specific feature of the PETL/tET/tPET series modules that can be
used to enable a pair of DI-to-DO connections via the Modbus TCP (Ethernet) protocol.
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The following table provides an overview of the parameters contained in the Pair-Connection Settings
section:
Item
Default
Value
Description
This parameter is used to define the Server mode for the
PETL/tET/tPET series module.
Mode = Disable: Server mode (Slave).
Mode
Mode = POLL: Poll remote DI to local DO in the Client mode (Master).
Disable
Mode = PUSH: Push local DI to remote DO in the Client mode
(Master).
The DI Count field must also be configured to enable Client mode.
Remote IP
The IP address of the remote device to access.
Remote Port
The TCP port number of the remote device to access.
Range: 0 to 65535.
Net ID
The Modbus Net ID of the remote device to access.
Range: 1 to 247.
0
502
1
For “POLL” mode, the module will update the DI/DO states based on
the time period of the Scan Time parameter.
Scan Time
For “PUSH” mode, the module will update remote DO state when the
local DI state is changed. The module will also force update remote
DO when the local DI is no change during the time period of the Scan
Time parameter.
1000 ms
Range: 1000 to 42949672965 ms.
DI Count
DI Addr
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This parameter specifies how many digital I/O channels are mapped.
Range: 1 to 16; 0= Disable.
For “POLL” mode, this parameter specifies the base address of the
Remote DI device that will be mapped to the Local DO register. The
range depends on the type of remote device being used.
For “PUSH” mode, this parameter specifies the base address of the
Local DI register that will be mapped to the Remote DO device. The
range depends on the type of PETL/tET/tPET module being used.
0
0
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DO Addr
For “POLL” mode, this parameter specifies the base address of the
Local DO register that will be mapped to the Remote DI device. The
range depends on the type of the ET-2200 module being used.
For “PUSH” mode, this parameter specifies the base address of the
Remote DO device that will be mapped to the Local DI register. The
range depends on the type of remote device being used.
TCP/UDP
This parameter is used to set the type of Modbus protocol to be used
and can be either TCP or UDP for the “PUSH” mode only.
Submit
Click this button to save the revised settings to PETL/tET/tPET module.
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0
TCP
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4.8 Filter
Clicking the Filter tab will display the Filter Settings page allowing you configure the IP Filter list for
the PETL/tET/tPET module, which will be described in more detail below.
Filter Settings
The Filter Settings page is used to query or edit the IP Filter List for the PETL/tET/tPET series module.
The IP filter list restricts the access of incoming packets based on the IP header. If one or more IP
addresses are saved to the IP Filter table, only Clients whose IP address is specified in the IP Filter List
will be able to access the PETL/tET/tPET series module.
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The following table provides an overview of the parameters contained in the IP Address Configuration
section:
Item
Description
Add “IP” to the List
This parameter is used to add an IP address to the Available IP List.
Delete IP # “number”
This parameter is used to delete IP# address from the Available IP List.
Delete All
This parameter is used to delete all IP address current contained in the
Available IP List.
Save to Flash
This parameter is used to save the updated Available IP List to the Flash
memory. Check the checkbox before clicking the Submit button of you wish to
store the most recent list.
Submit
Click this button to save the revised settings to PETL/tET/tPET module.
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4.9 Monitor
After clicking the Monitor tab, the Current Connection Status page will be displayed showing detailed
information regarding the current status of the serial port connection settings for the PETL/tET/tPET
series module.
4.10 Change Password
Clicking the Change Password tab will display the Change Password page. To change a password, first
enter the old password in the “Current password” field (default is Admin) and then enter a new
password in the “New password” field. Re-enter the new password in the “Confirm new password”
field, and then click the “Submit” button to update the password.
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4.11 Logout
Clicking the Logout tab will immediately log you out from the system and return you to the login page.
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5. I/O Pair Connection Applications
The PETL/tET/tPET series modules can be used to create DI-to-DO pair connections via the Ethernet.
Once the configuration is complete, the modules can then poll the status of the local DI channels and
then use the Modbus/TCP protocol to continuously write to a remote DO device in the background.
This is useful when connecting digital I/O devices that do not themselves have Ethernet capability. The
following will describe how to correctly configure the I/O pair connection function.
5.1 One Module Polling the Remote DI/DO (1-to-1,
Polling Mode)
Step 1: Connect the device to a Network, a PC and a Power supply.
Confirm that the PETL/tET/tPET series modules are functioning correctly. Refer to Chapter 3. “Getting
Started” for more details. An example configuration shown below:
Note that tPET-P2POR2 and tPET-PD2POR2 modules are used in this example.
Figure 5-1.1
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Step 2: Configure the Ethernet Settings
Contact your Network Administrator to obtain the correct network configuration information for the
PETL/tET/tPET series modules, such as the IP Address, Subnet Mask, and Gateway details. Refer to
Section 3.4 “Using the eSearch Utility to assign a new IP” for more details.
Figure 5-1.2
Step 3: Configure the I/O Pair connection on the Web Server
1. In the eSearch Utility, select PETL/tET/tPET module #1 and then click the “Web” button to launch
the browser program and connect to the web server.
2. Enter the password in the Login password field (the default password is “Admin”), and then click
the “Submit” button to display the configuration page.


Figure 5-1.3
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3. Click the “Pair” tab to display the Pair Connection settings page.
Figure 5-1.4
Polling Mode
4.
5.
6.
7.
In the “I/O Pair-connection Settings”, select “POLL” from the “Mode” drop-down options.
Enter the IP address for tPET-PD2POR2 #2 module in the “Remote IP” field.
Enter the TCP Port for tPET-PD2POR2 #2 module in the “Remote Port” field.
Enter a DI Count Value for tPET-PD2POR2 #2 module in the “DI Count” field (Remote DI to Local
DO).
The following is an example of a Polling mode configuration:
Enter“2” in the “DI Count” field. This means DI x2 of tPET-PD2POR2 #2 module is mapped to DO
x2 of tPET-P2POR2 #1 module.
8. Click the “Submit” button to complete the configuration.
Figure 5-1.5
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Push Mode
4. In the “I/O Pair-connection Settings”, select “PUSH” from the “Mode” drop-down options.
5. Enter the IP address for tPET-PD2POR2 #2 module in the “Remote IP” field.
6. Enter the TCP Port for tPET-PD2POR2 #2 module in the “Remote Port” field.
7. Enter a DI Count Value for tPET-P2POR2 #1 module in the “DI Count” field (Local DI to Remote DO).
The following is an example of a Push mode configuration:
Enter“2” in the “DI Count” field. This means DI x2 of tPET-P2POR2 #1 module is mapped to DO x2
of tPET-PD2POR2 #2 module.
8. Select Modbus protocol (e.g., “TCP”) from the “TCP/UDP” drop-down options.
9. Click the “Submit” button to complete the configuration.
Figure 5-1.6
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5.2 Two Modules Pushing the Local DI to each
other (1-to-1, Push mode)
Step 1: Connect the device to a Network, a PC and a Power supply.
Confirm that the PETL/tET/tPET series modules are functioning correctly. Refer to Chapter 3 “Getting
Started” for more details. An example configuration shown below:
Note that tPET-P2POR2 and tPET-PD2POR2 modules are used in this example.
Figure 5-2.1
Step 2: Configure the Ethernet Settings
Contact your Network Administrator to obtain the correct network configuration information for the
ET-2200 series modules (e.g., tPET-P2POR2 #1 and tPET-PD2POR2 #2), such as the IP Address, Subnet
Mask, and Gateway details. Refer to Section 3.4 “Using the eSearch Utility to assign a new IP” for
more details.
Figure 5-2.2
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Step 3: Configure the I/O Pair connection on the tPET-P2POR2 #1 module
1. In the eSearch Utility, select tPET-P2POR2 #1 module and then click the “Web” button to launch
the browser program and connect to the web server.
2. Enter the password in the Login password field (the default password is “Admin”), and then click
the “Submit” button to display the configuration page.
3. Click the “Pair” tab to display the I/O Pair-connection Settings page.
Refer to Figures 5-1.3 to 5-1.4 for illustrations of how to perform the above procedure.
4. In the “I/O Pair-connection Settings”, select “PUSH” from the “Mode” drop-down options.
5. Enter the IP address for tPET-PD2POR2 #2 module in the “Remote IP” field.
6. Enter the TCP Port for tPET-PD2POR2 #2 module in the “Remote Port” field.
7. Enter a DI Count Value for tPET-P2POR2 #1 module in the “DI Count” field (Local DI to Remote DO).
For example, enter “1” in the “DI Count” field. This means DI x1 of tPET-P2POR2 #1 module is
mapped to DO1 x of tPET-PD2POR2 #2 module.
8. Select Modbus protocol (e.g., “TCP”) from the “TCP/UDP” drop-down options.
9. Click the “Submit” button to complete the configuration.
Figure 5-2.3
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Step 4: Configure the I/O Pair connection on the tPET-PD2POR2 #2 module
1. In the eSearch Utility, select tPET-PD2POR2 #2 module and then click the “Web” button to launch
the browser program and connect to the web server.
2. Enter the password in the Login password field (the default password is “Admin”), and then click
the “Submit” button to display the configuration page.
3. Click the “Pair” tab to display the I/O Pair-connection Settings page.
Refer to Figures 5-1.3 to 5-1.4 for illustrations of how to perform the above procedure.
4. In the “I/O Pair-connection Settings”, select “PUSH” from the “Mode” drop-down options.
5. Enter the IP address for tPET-P2POR2 #1 module in the “Remote IP” field.
6. Enter the TCP Port for tPET-P2POR2 #1 module in the “Remote Port” field.
7. Enter a DI Count Value for tPET-PD2POR2 #2 module in the “DI Count” field (Local DI to Remote
DO).
For example, enter “1” in the “DI Count” field. This means DI x1 of tPET-PD2POR2 #2 module is
mapped to DO1 x of tPET-P2POR2 #1 module.
8. Select Modbus protocol (e.g., “TCP”) from the “TCP/UDP” drop-down options.
9. Click the “Submit” button to complete the configuration.
Figure 5-2.4
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5.3 Several Modules Polling the Remote DI
(M-to-1) (Polling Mode)
Step 1: Connect the device to a Network, a PC and a Power supply.
Confirm that the PETL/tET/tPET series modules and remote slave device are functioning correctly.
Refer to Chapter 3 “Getting Started” for more details. An example configuration shown below:
Note that tPET-P2POR2, tPET-PD2POR2 and ET-2260 modules are used in this example.
Figure 5-3.1
Step 2: Configure the Ethernet Settings
Contact your Network Administrator to obtain the correct network configuration information for the
PETL/tET/tPET series modules and remote slave device (e.g., tPET-P2POR2 #1, tPET-PD2POR2 #2 and
ET-2260), such as the IP Address, Subnet Mask, and Gateway details. Refer to Section 3.4 “Using the
eSearch Utility to assign a new IP”
for more details.
Figure 5-3.2
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Step 3: Configure the I/O Pair connection on the tPET-P2POR2 #1 module
1. In the eSearch Utility, select tPET-P2POR2 #1 module and then click the “Web” button to launch
the browser program and connect to the web server.
2. Enter the password in the Login password field (the default password is “Admin”), and then click
the “Submit” button to display the configuration page.
3. Click the “Pair” tab to display the I/O Pair-connection Settings page.
Refer to Figures 5-1.3 to 5-1.4 for illustrations of how to perform the above procedure.
4. In the “I/O Pair-connection Settings”, select “POLL” from the “Mode” drop-down options.
5. Enter the IP address for remote slave device (e.g., ET-2260) in the “Remote IP” field.
6. Enter the TCP Port for remote slave device (e.g., ET-2260) in the “Remote Port” field.
7. Enter a DI Count Value for remote slave device (e.g., ET-2260) in the “DI Count” field (Remote DI to
Local DO).
For example, enter “2” in the “DI Count” field. This means DI x2 of the ET-2260 module is mapped
to DO x2 of tPET-P2POR2 #1 module.
8. Enter the DI address for remote slave device (e.g., ET-2260) in the “DI Addr” field (Remote DI to
Local DO).
For example, enter “0” in the “DI Addr” field. This means DI addresses DI0 and DI1 of the ET-2260
module are mapped to DO x2 of tPET-P2POR2 #1 module.
Figure 5-3.3
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Step 4: Configure the I/O Pair connection on the tPET-PD2POR2 #2 module
1. In the eSearch Utility, select tPET-PD2POR2 #2 module and then click the “Web” button to launch
the browser program and connect to the web server.
2. Enter the password in the Login password field (the default password is “Admin”), and then click
the “Submit” button to display the configuration page.
3. Click the “Pair” tab to display the I/O Pair-connection Settings page.
Refer to Figures 5-1.3 to 5-1.4 for illustrations of how to perform the above procedure.
4. In the “I/O Pair-connection Settings”, select “POLL” from the “Mode” drop-down options.
5. Enter the IP address for remote slave device (e.g., ET-2260) in the “Remote IP” field.
6. Enter the TCP Port for remote slave device (e.g., ET-2260) in the “Remote Port” field.
7. Enter a DI Count Value for remote slave device (e.g., ET-2260) in the “DI Count” field (Remote DI to
Local DO).
For example, enter “2” in the “DI Count” field. This means DI x2 of the ET-2260 module is mapped
to DO x2 of tPET-PD2POR2 #2 module.
8. Enter the DI address for remote slave device (e.g., ET-2260) in the “DI Addr” field (Remote DI to
Local DO).
For example, enter “2” in the “DI Addr” field. This means DI addresses DI2 and DI3 of the ET-2260
module are mapped to DO x2 of tPET-PD2POR2 #2 module.
9. Click the “Submit” button to complete the configuration.
Figure 5-3.4
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5.4 Several Modules Pushing the Local DI (M-to-1)
(Push Mode)
Step 1: Connect the device to a Network, a PC and a Power supply.
Confirm that the PETL/tET/tPET series modules and remote slave device are functioning correctly.
Refer to Chapter 3. “Getting Started” for more details. An example configuration shown below:
Note that tPET-P2POR2, tPET-PD2POR2 and ET-2260 modules are used in this example.
Figure 5-4.1
Step 2: Configure the Ethernet Settings
Contact your Network Administrator to obtain the correct network configuration information for the
PETL/tET/tPET series modules and remote slave device (e.g., tPET-P2POR2 #1, tPET-PD2POR2 #2 and
ET-2260), such as the IP Address, Subnet Mask, and Gateway details. Refer to Section 3.4 “Using the
eSearch Utility to assign a new IP”
for more details.
Figure 5-4.2
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Step 3: Configure the I/O Pair connection on the tPET-P2POR2 #1 module
1. In the eSearch Utility, select tPET-P2POR2 #1 module and then click the “Web” button to launch
the browser program and connect to the web server.
2. Enter the password in the Login password field (the default password is “Admin”), and then click
the “Submit” button to display the configuration page.
3. Click the “Pair Connection” tab to display the I/O Pair-connection Settings page.
Refer to Figures 5-1.3 to 5-1.4 for illustrations of how to perform the above procedure.
4. In the “I/O Pair-connection Settings”, select “PSUH” from the “Mode” drop-down options.
5. Enter the IP address for remote slave device (e.g., ET-2260) in the “Remote IP” field.
6. Enter the TCP Port for remote slave device (e.g., ET-2260) in the “Remote Port” field.
7. Enter a DI Count Value for tPET-P2POR2 #1 module in the “DI Count” field (Local DI to Remote DO).
For example, enter “2” in the “DI Count” field. This means DI x2 of the tPET-P2POR2 #1 module is
mapped to DO x2 of the ET-2260 module.
8. Enter the DO address for remote slave device (e.g., ET-2260) in the “DO Addr” field (Local DI to
Remote DO).
For example, enter “0” in the “DO Addr” field. This means DO addresses DO0 and DO1 of the
ET-2260 module are mapped to DI x2 of tPET-P2POR2 #1 module.
9. Select Modbus protocol (e.g., “TCP”) from the “TCP/UDP” drop-down options.
10. Click the “Submit” button to complete the configuration.
Figure 5-4.3
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PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 81
Ethernet I/O Modules
Step 4: Configure the I/O Pair connection on the tPET-PD2POR2 #2 module
1. In the eSearch Utility, select tPET-PD2POR2 #2 module and then click the “Web” button to launch
the browser program and connect to the web server.
2. Enter the password in the Login password field (the default password is “Admin”), and then click
the “Submit” button to display the configuration page.
3. Click the “Pair Connection” tab to display the I/O Pair-connection Settings page.
Refer to Figures 5-1.3 to 5-1.4 for illustrations of how to perform the above procedure.
4. In the “I/O Pair-connection Settings”, select “PSUH” from the “Mode” drop-down options.
5. Enter the IP address for remote slave device (e.g., ET-2260) in the “Remote IP” field.
6. Enter the TCP Port for remote slave device (e.g., ET-2260) in the “Remote Port” field.
7. Enter a DI Count Value for tPET-PD2POR2 #2 module in the “DI Count” field (Local DI to Remote
DO).
For example, enter “2” in the “DI Count” field. This means DI x2 of the tPET-PD2POR2 #2 module is
mapped to DO x2 of the ET-2260 module.
8. Enter the DO address for remote slave device (e.g., ET-2260) in the “DO Addr” field (Local DI to
Remote DO).
For example, enter “2” in the “DO Addr” field. This means DO addresses DO2 and DO3 of the
ET-2260 module are mapped to DI x2 of tPET-PD2POR2 #2 module.
9. Select Modbus protocol (e.g., “TCP”) from the “TCP/UDP” drop-down options.
10. Click the “Submit” button to complete the configuration.
Figure 5-4.4
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PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 82
Ethernet I/O Modules
6.
Modbus Information
The PETL/tET/tPET series is a family of
IP-based Modbus I/O devices that
allow you to remotely control DI/DO
terminals via an Ethernet connection
and
uses
a
master-slave
communication technique in which
only one device (the master) can
initiate a transaction (called queries),
while other devices (slaves) respond
by either supplying the requested
data to the master, or by taking the
action requested in the query.
Most SCADA (Supervisory Control and
Data Acquisition) and HMI software,
such as Citect (Schneider Electric),
ICONICS, iFIX, InduSoft, Intouch,
Entivity Studio, Entivity Live, Entivity
VLC, Trace Mode, Wizcon (ElUTIONS), and Wonderware, etc. can be used to easily integrate serial
devices via the Modbus protocol.
Modbus/TCP master applications can also be developed using any programming language, such as VB,
C# and so on.
ICP DAS provides the Modbus SDK that allows development of Modbus applications on a PC.
The relevant demo programs and SDK can be obtained from the following locations:
VB Demo:http://ftp.icpdas.com/pub/cd/6000cd/napdos/et7000/demo/pc_client/
.Net demo and SDK:http://ftp.icpdas.com/pub/cd/8000cd/napdos/modbus/nmodbus/
ICP DAS CO., LTD.
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Ethernet I/O Modules
6.1 What is Modbus TCP/IP?
Modbus is a communication protocol that was developed by Modicon Inc. in 1979, and was originally
designed for use with Modicon controllers. Detailed information regarding the Modbus protocol can
be found at: http://www.modbus.org.
The different versions of the Modbus protocol used today include Modbus RTU, which is based on
serial communication interfaces such as RS-485 and RS-232, Modbus ASCII and Modbus TCP, which
uses the Modbus RTU protocol embedded into TCP packets.
Modbus TCP is an internet protocol. The protocol embeds a Modbus frame into a TCP frame so that a
connection oriented approach is obtained, thereby making it more reliable. The master queries the
slave and the slave responds with a reply. The protocol is open and, hence, highly scalable.
6.2 Modbus Message Structure
Modbus devices communicate using a master-slave (client-server) technique in which only one device
(the master/client) can initiate transactions (called queries). The other devices (slaves/servers)
respond by either supplying the requested data to the master, or by taking the action requested in the
query.
A query from a master will consist of a slave address (or broadcast address), a function code defining
the requested action, any required data, and an error checking field. A response from a slave consists
of fields confirming the action taken, any data to be returned, and an error checking field.
 The Modbus/TCP Message Structure
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Bytes 00 - 05
Bytes 06 - 11
6-byte header
RTU Data
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Ethernet I/O Modules
 The Leading 6 bytes of a Modbus/TCP Protocol Query
Byte 00
Byte 01
Byte 02
Transaction identifier
Byte 03
Protocol identifier
Byte 04
Byte 05
Length Field
(upper byte )
Length Field
(lower byte)
Transaction identifier = Assigned by the Modbus/TCP master (client)
Protocol identifier = 0
Length field (upper byte) = 0 (since all messages are smaller than 256)
Length field (lower byte) = The number of following RTU data bytes
 RTU Data Structure
Byte 06
Byte 07
Bytes 08-09
Bytes 10-11
Data Field
Net ID
(Station Number)
Function Code
Reference Number
(Address Mapping)
Number of Points
1. Net ID specifies the address of the receiver (Modbus/TCP slave).
2. Function Code specifies the message type.
3. Data Field is the data block.
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Ethernet I/O Modules
1. Net ID (Station Number)
The first byte in the frame structure of a Modbus RTU query is the receiver’s address. Availed
address is in the range of 0 to 247. Address 0 is used for general broadcast, while addresses 1 to
247 are given to individual Modbus devices.
2. Function Code
The second byte in the frame structure of a Modbus RTU query is the function code, which describes
what the slave device is required to do. Valid function codes are between 1 and 255. To answer the
query, the slave device uses the same function code as contained in the request. The highest bit of the
function code will only be set to ‘1’ if an error occurs in the system. In this way, the master will know
whether the message has been transmitted correctly or not.
Code
Function
Reference (Address)
01 (0x01)
Read the Status of the Coils (Readback DOs)
0xxxx
02 (0x02)
Read the Status of the Input(Reads DIs)
1xxxx
03 (0x03)
Read the Holding Registers (Readback AOs)
4xxxx
04 (0x04)
Read the Input Registers (Reads AIs)
3xxxx
05 (0x05)
Force a Single Coil (Writes DO)
0xxxx
06 (0x06)
Preset a Single Register (Writes AO)
4xxxx
15 (0x0F)
Force Multiple Coils (Writes DOs)
0xxxx
16 (0x10)
Preset Multiple Registers (Writes AOs)
4xxxx
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Ethernet I/O Modules
3. Data Field
Data is transmitted in 8-, 16- and 32-bit format. The data for 16-bit registers is transmitted in high-byte
first format. For example: 0x0A0B ==> 0x0A, 0x0B. The data for 32-bit registers is transmitted as two
16-bit registers, and is low-word first. For example: 0x0A0B0C0D ==> 0x0C, 0x0D, 0x0A, 0x0B.
The data field of messages sent between a master and a slave contains additional information about
the action to be taken by the master or any information requested by the slave. If the master does not
require this information, the data field can be empty.
Reference (Address)
Description
Read/Write Discrete Outputs or Coils.
0xxxx
A 0x reference address is used to output device data to a digital
output channel.
Read Discrete Inputs.
1xxxx
The ON/OFF status of a 1x reference address is controlled by the
corresponding digital input channel.
Read Input Registers.
3xxxx
A 3x reference register contains a 16-bit number received from
an external source, e.g. an analog signal.
Read/Write Output or Holding Registers.
4xxxx
A 4x register is used to store 16bits of numerical data (binary or
decimal), or to send the data from the CPU to an output channel.
For more details regarding Address Mapping (Reference Number), refer to Section 6.3 “Modbus
Register Table”.
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Ethernet I/O Modules
01(0x01) Read the Status of the Coils (Readback DOs)
This function code is used to read either the current status of the coils or the current digital output
readback value from the PETL/tET/tPET module.
[Request]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x01
Refer to the Modbus Address Table for the
PETL/tET/tPET series.
02-03
Starting DO Address
2 Bytes
(Section 6.3 Modbus Register Table)
Byte 02 = high byte
Byte 03 = low byte
04-05
Byte 04 = high byte
Number of Points (Channels)
2 Bytes
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x01
02
Byte Count
1 Byte
Byte 05 = low byte
[Response]
Byte
Byte Count of the Response
( n = (Points+7)/8 )
n= 1; Byte 03 = data bit 7 to 0
03
Data
n Bytes
n= 2; Byte 04 = data bit 15 to 8
.......
n= m; Byte m+2 = data bit (8m-1) to 8(m-1)
[Error Response]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x81
02
Exception Code
1 Byte
ICP DAS CO., LTD.
Refer to the Modbus Standard Specifications
for more details
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 88
Ethernet I/O Modules
Example: Function 01 (0x01), Readback DOs
Command:
Response:
[Leading 6 bytes]
[Request]
01 02 00 00 00 06
01 01 00 00 00 02
[Leading 6 bytes]
[Response]
01 02 00 00 00 04
01 01 01 03
Reads the digital output value
A description of the command and response is as follows:
Command:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 06 (Number of bytes remaining in this frame)
[Request]
Byte 00
Byte 01
Byte 02-03
Byte 04-05
Response:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 04(Number of bytes remaining in this frame)
[Response]
Byte 00
Byte 01
Byte 02
Byte 03
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01 (Net ID)
01 (Function Code)
00 00 (Starting DO Address)
00 02 (Number of Points)
01 (Net ID)
01 (Function Code)
01 (Byte Count of the Response)
03 (Value for DO1 to DO0)
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 89
Ethernet I/O Modules
02(0x02) Read the Status of the Input (Read DIs)
This function code is used to read the current digital input value from the PETL/tET/tPETL module.
[Request]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x02
Refer to the Modbus Address Table for the
PETL/tET/tPET series.
02-03
Starting DI Address
2 Bytes
(Section 6.3 Modbus Register Table)
Byte 02 = high byte
Byte 03 = low byte
04-05
Byte 04 = high byte
Number of Points (Channels)
2 Bytes
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x02
02
Byte Count
1 Byte
Byte 05 = low byte
[Response]
Byte
Byte Count of Response
( n =(Points+7)/8 )
n= 1; Byte 03 = data bit 7 to 0
03
Data
n Bytes
n= 2; Byte 04 = data bit 15 to 8
.......
n= m; Byte m+2 = data bit (8m-1) to 8(m-1)
[Error Response]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x82
02
Exception Code
1 Byte
ICP DAS CO., LTD.
Refer to the Modbus Standard
Specifications for more details
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 90
Ethernet I/O Modules
Example: Function 02 (0x02), Read DIs
Command:
Response:
[Leading 6 bytes]
[Request]
01 02 00 00 00 06
01 02 00 00 00 02
[Leading 6 bytes]
[Response]
01 02 00 00 00 04
01 02 01 03
Reads the digital input value
A description of the command and response is as follows:
Command:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 06 (Number of bytes remaining in this frame)
[Request]
Byte 00
Byte 01
Bytes 02-03
Bytes 04-05
Response:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 04 (Number of bytes remaining in this frame)
[Response]
Byte 00
Byte 01
Byte 02
Byte 03
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01 (Net ID)
02 (Function Code)
00 00 (Starting DI Address)
00 02 (Number of Points)
01 (Net ID)
02 (Function Code)
01 (Byte Count of the Response)
03 (Value for DI1 to DI0)
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 91
Ethernet I/O Modules
03(0x03) Read the Holding Registers (Readback AOs)
This function code is used to readback either the current values in the holding registers or the analog
output value from the PETL/tET/tPET module. These registers are also used to store the preset values
for the digital counter, the host watchdog timer, the module name and the TCP timeout, etc.
[Request]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x03
02-03
04-05
Starting AO Address
Number of 16-bit Registers
(Channels)
2 Bytes
2 Bytes
Refer to the Modbus Address Table for the
PETL/tET/tPET series.
(Section 6.3 Modbus Register Table)
Byte 02 = high byte
Byte 03 = low byte
Word Count
Byte 04 = high byte
Byte 05 = low byte
[Response]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x03
02
Byte Count
1 Byte
03~
Register Values
n Bytes
Byte Count of the Response (n=Points x 2 Bytes)
Register Values
n= 2; Byte 03 = high byte
Byte 04 = low byte
.......
n= m; Byte 03 = high byte
Byte 04 = low byte
.......
Byte m+1 = high byte
Byte m+2 = low byte
[Error Response]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
02
Exception Code
1 Byte
0x83
Refer to the Modbus Standard Specifications for
more details
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Ethernet I/O Modules
Example: Function 03 (0x03), Read AOs
Command:
Response:
[Leading 6 bytes]
[Request]
01 02 00 00 00 06
01 03 01 03 00 02
[Leading 6 bytes]
[Response]
01 02 00 00 00 07
01 03 0450 32 41 32
Reads the name of the module for the tPET-P2A2
A description of the command and response is as follows:
Command:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 06 (Number of bytes remaining in this frame)
[Request]
Byte 00
Byte 01
Bytes 02-03
Bytes 04-05
Response:
[Leading 6 bytes]
Bytes 00-03
Bytes 04-05
[Response]
Byte 00
Byte 01
Byte 02
Bytes 03-04
Byte 05-06
ICP DAS CO., LTD.
01 (Net ID)
03 (Function Code)
01 03 (Starting AO Address)
00 02 (Number of Points)
01 02 00 00 (Message Number)
00 07 (Number of bytes remaining in this frame)
01 (Net ID)
03 (Function Code)
04 (Byte Count of the Response)
50 32 (The low word for the module name: The ASCII code
“0x50, 0x32” represents the characters “P” and “2”)
41 32 (The high word for the module name: The ASCII code
“0x41, 0x32” represents the characters “A” and “2”)
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 93
Ethernet I/O Modules
04(0x04) Read the Input Registers (Read AIs)
This function code is used to read either the input registers or the current analog input value from the
PETL/tET/tPET module.
These registers are also used to store the current value for the digital counter, the number of DI
channels and the number of DO channels, etc.
[Request]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
Starting AI Address
2 Bytes
0x04
Refer to the Modbus Address Table for the
PETL/tET/tPET series.
(Section 6.3 Modbus Register Table)
Byte 02 = high byte
Byte 03 = low byte
02-03
04-05
Number of 16-bit Registers
(Channels)
Word Count
2 Bytes
Byte 04 = high byte
Byte 05 = low byte
[Response]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x04
02
Byte Count
1 Byte
Byte Count of the Response (n=Points x 2 Bytes)
n Bytes
Register Values
n= 2; Byte 03 = high byte
Byte 04 = low byte
.......
n= m; Byte 03 = high byte
Byte 04 = low byte
.......
Byte m+1 = high byte
Byte m+2 = low byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
02
Exception Code
1 Byte
0x84
Refer to the Modbus Standard Specifications for
more details.
03~
Register Values
[Error Response]
Byte
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Ethernet I/O Modules
Example: Function 04 (0x04), Read AIs
Command:
Response:
[Leading 6 bytes]
[Request]
01 02 00 00 00 06
01 04 00 64 00 01
[Leading 6 bytes]
[Response]
01 02 00 00 00 05
01 04 02 00 02
Reads the number of the DI channels on the tPET-P2A2
A description of the command and response is as follows:
Command:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 06 (Number of bytes remaining in this frame)
[Request]
Byte 00
Byte 01
Bytes 02-03
Bytes 04-05
Response:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 05 (Number of bytes remaining in this frame)
[Response]
Byte 00
Byte 01
Byte 02
Bytes 03-04
ICP DAS CO., LTD.
01 (Net ID)
04 (Function Code)
0064 (Starting AI Address)
00 01 (Number of 16-bit Registers)
01 (Net ID)
04 (Function Code)
02 (Byte Count of the Response)
00 02 (Number of DI Channels on the tPET-P2A2)
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 95
Ethernet I/O Modules
05(0x05) Force a Single Coil (Write DO)
This function code is used to set the status of a single coil or a single digital output value for the
PETL/tET/tPET module.
[Request]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x05
Refer to the Modbus Address Table for the
PETL/tET/tPET series.
(Section 6.3 Modbus Register Table)
Byte 02 = high byte
Byte 03 = low byte
0xFF 00 sets the output to ON.
0x00 00 sets the output to OFF.
All other values are invalid and will not
affect the coil.
Byte 04 = high byte
Byte 05 = low byte
02-03
DO Address
2 Bytes
04-05
Output Value
2 Bytes
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x05
02-03
DO Address
2 Bytes
04-05
Output Value
2 Bytes
[Response]
Byte
The value is the same as Bytes 02-03 of the
Request
The value is the same as Bytes 04-05 of the
Request
[Error Response]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x85
02
Exception Code
1 Byte
ICP DAS CO., LTD.
Refer to the Modbus Standard
Specifications for more details.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 96
Ethernet I/O Modules
Example: Function 05 (0x05), Write DO
Command:
Response:
[Leading 6 bytes]
[Request]
01 02 00 00 00 06
01 05 00 01 FF 00
[Leading 6 bytes]
[Response]
01 02 00 00 00 06
01 05 00 01 FF 00
Sets Channel DO1 to ON
A description of the command and response is as follows:
Command:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 06 (Number of bytes remaining in this frame)
[Request]
Byte 00
Byte 01
Bytes 02-03
Bytes 04-05
Response:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message number)
Bytes 04-05
00 06 (Number of bytes remaining in this frame)
[Response]
Byte 00
Byte 01
Bytes 02-03
Bytes 04-05
ICP DAS CO., LTD.
01 (Net ID)
05 (Function Code)
00 01(DO Address)
FF00 (Sets the output to ON)
01 (Net ID)
05 (Function Code)
00 01 (DO Address)
FF 00 (Indicates that the DO has been set to ON)
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 97
Ethernet I/O Modules
06(0x06) Preset a Single Register (Write AO)
This function code is used to set a specific holding register to store the configuration values for the
PETL/tET/tPET module.
[Request]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x06
Refer to the Modbus Address Table for the
PETL/tET/tPET series.
02-03
AO Address
2 Bytes
(Section 6.3 Modbus Register Table)
Byte 02 = high byte
Byte 03 = low byte
Register Value
04-05
Register Value
2 Bytes
Byte 04 = high byte
Byte 05 = low byte
[Response]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x06
02-03
AO Address
2 Bytes
04-05
Register Value
2 Bytes
The value is the same as Bytes 02-03 of the
Request
The value is the same as Bytes 04-05 of the
Request
[Error Response]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x86
02
Exception Code
1 Byte
ICP DAS CO., LTD.
Refer to the Modbus Standard
Specifications for more details.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 98
Ethernet I/O Modules
Example: Function 06 (0x06), Write AO
Command:
Response:
[Leading 6 bytes]
[Request]
01 02 00 00 00 06
01 06 01 08 00 3C
[Leading 6 bytes]
[Response]
01 02 00 00 00 06
01 06 01 08 00 3C
Sets the system timeout to 60 seconds
A description of the command and response is as follows:
Command:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 06 (Number of bytes remaining in this frame)
[Request]
Byte 00
Byte 01
Bytes 02-03
Bytes 04-05
Response:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 06 (Number of bytes remaining in this frame)
[Response]
Byte 00
Byte 01
Bytes 02-03
Bytes 04-05
ICP DAS CO., LTD.
01 (Net ID)
06 (Function Code)
01 08 (AO Address)
00 3C (Sets the system timeout to 60 seconds)
01 (Net ID)
06 (Function Code)
01 08 (AO Address)
00 3C (Indicates that the system timeout has been set
to 60 seconds)
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 99
Ethernet I/O Modules
15(0x0F) Force Multiple Coils (Write DOs)
This function code is used to set multiple coils status or write multiple digital output values for the
PETL/tET/tPET module.
[Request]
Byte
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
02-03
Starting DO Address
2 Bytes
0x0F
Refer to the Modbus Address Table for
PETL/tET/tPET series.
(Section 6.3 Modbus Register Table)
Byte 02 = high byte
Byte 03 = low byte
04-05
Number of Output Channels
(Points)
2 Bytes
06
Byte count
1 Byte
07
Output value
n Bytes
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1 to 247
01
Function Code
1 Byte
0x0F
02-03
Starting DO Address
2 Bytes
The value is the same as Bytes 02-03 of the
Request
04-05
Number of Output Channels
(Points)
2Bytes
The value is the same as Bytes 04-05 of the
Request
Description
Size
Value
00
Net ID (Station Number)
1 Byte
1to 247
01
Function Code
1 Byte
0x8F
02
Exception Code
1 Byte
Refer to the Modbus Standard
Specifications for more details.
Byte 04 = high byte
Byte 05 = low byte
n = (Points +7)/8
A bit corresponds to a channel. A value of 1
for a bit denotes that the channel is ON,
while a value of denotes that the channel is
OFF.
n= 1; Byte 07 = data bit 7 to 0
n= 2; Byte 08 = data bit 15 to 8
.......
n= m; Byte m+6 = data bit (8m-1)to 8(m-1)
[Response]
Byte
[Error Response]
Byte
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 100
Ethernet I/O Modules
Example: Function 15 (0x0F), Write DOs
Command:
Response:
[Leading 6 bytes]
[Request]
01 02 00 00 00 08
01 0F 01 0B 00 02 01 03
[Leading 6 bytes]
[Response]
01 02 00 00 00 06
01 0F 01 0B 00 02
Sets the safe value (DO0 – DO1)
A description of the command and response is as follows:
Command:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 08 (Number of bytes remaining in this frame)
[Request]
Byte 00
Byte 01
Bytes 02-03
Bytes 04-05
Byte 06
Byte 07
Response:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 06 (Number of bytes remaining in this frame)
[Response]
Byte 00
Byte 01
Bytes 02-03
Bytes 04-05
ICP DAS CO., LTD.
01 (Net ID)
0F (Function Code)
01 0B (Starting DO Address)
00 02 (Number of Output Channels)
01 (Byte Count)
03 (Output Value)
01 (Net ID)
0F (Function Code)
01 0B (Starting DO Address)
00 02 (Number of Input Channels)
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 101
Ethernet I/O Modules
16(0x10) Preset Multiple Registers (Write AOs)
This function code is used to set multiple holding registers that are used to store the configuration
values for the PETL/tET/tPET module.
[Request]
Byte
Description
Size
Value
Net ID (Station Number)
Function Code
1 Byte
1 Byte
02-03
Starting AO Address
2 Bytes
04-05
Number of 16-bit Registers
(Channels)
2 Bytes
06
Byte Count
1 Byte
07
Register Values
n Bytes
1 to 247
0x10
Refer to the Modbus Address Table for the
PETL/tET/tPET series.
(Section 6.3 Modbus Register Table)
Byte 02 = high byte
Byte 03 = low byte
Word Count.
Byte 04 = high byte
Byte 05 = low byte
n =Points x 2 Bytes
Register Values.
n= 2; Byte 03 = high byte
Byte 04 = low byte
.......
n= m; Byte 03 = high byte
Byte 04 = low byte
.......
Byte m+1 = high byte
Byte m+2 = low byte
00
01
[Response]
Byte
Description
Size
Value
00
01
02-03
Net ID (Station Number)
Function Code
Starting AO Address
Number of 16-bit Registers
(Channels)
1 Byte
1 Byte
2 Bytes
1 to 247
0x10
The value is the same as Bytes 02-03 of the Request
2 Bytes
The value is the same as Bytes 04-05 of the Request
Description
Size
Value
00
01
Net ID (Station Number)
Function Code
1 Byte
1 Byte
02
Exception Code
1 Byte
1 to 247
0x90
Refer to the Modbus Standard Specifications for
more details.
04-05
[Error Response]
Byte
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 102
Ethernet I/O Modules
Example: Function 16 (0x10), Write AOs
Command:
Response:
[Leading 6 bytes]
[Request]
01 02 00 00 00 0B
01 10 00 32 00 01 02 03 E8 00 00
[Leading 6 bytes]
[Response]
01 02 00 00 00 06
01 10 00 32 00 01
Sets the Preset value for the digital counter
A description of the command and response is as follows:
Command:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 0B (Number of bytes remaining in this frame)
[Request]
Byte 00
Byte 01
Bytes 02-03
Bytes 04-05
Byte 06
Bytes 07-10
Response:
[Leading 6 bytes]
Bytes 00-03
01 02 00 00 (Message Number)
Bytes 04-05
00 06 (Number of bytes remaining in this frame)
[Response]
Byte 00
Byte 01
Bytes 02-03
Bytes 04-05
ICP DAS CO., LTD.
01 (Net ID)
10 (Function Code)
00 32 (Starting AO Address)
00 01 (Number of 16-bit Registers)
02 (Byte Count)
03 E8 00 00 (Preset Value for the digital counter)
01 (Net ID)
10 (Function Code)
00 32 (Starting AO address)
00 01 (Word Count)
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 103
Ethernet I/O Modules
6.3 Modbus Register Table
Data from 16-bit registers is transmitted in high-byte first order. For example: 0x0A0B ==> 0x0A, 0x0B.
Data from 32-bit registers is transmitted as two 16-bit registers, and is in low-word first order. For
example: 0x0A0B0C0D ==> 0x0C, 0x0D, 0x0A, 0x0B.
6.3.1
Common Functions
 0xxxx: DO Address (Base 0)
Starting
Address
127
(0x7F)
128
(0x80)
133
(0x85)
Remarks
Points
Description
all
default
Bits per
Point
Range
Access Type
1
1 = Restore
W (Pulse)
1
Restores
settings
web
1
Default ID Settings
1
1 = Restore
W (Pulse)
1
Reboots the PETL/tET/tPET
module
1
1 = Reboot
W (Pulse)
“W”: Write
 3xxxx: AI address (Base 0)
Starting
Address
151
(0x97)
158
(0x9E)
160
(0xA0)
Remarks
ICP DAS CO., LTD.
Points
Description
Bits per
Point
Range
Access
Type
1
Firmware Version
16
“123” denotes that the
version is 1.2.3
R
1
Modbus Communication
Status
16
0 = No Error
1 = Timeout
R
16
0 = Normal
1 = Timeout
2 = Disconnected
R
1
Pair-Connection Status
“R”: Read
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Ethernet I/O Modules
 4xxxx: AO Address (Base 0)
Starting
Address
255
(0xFF)
Points
1
Description
Bits per
Point
CPU Reset Status
16
Range
1 = Reset at Power-on
2 = Reset by the WDT
3 = Reset using the reset
command
Access
Type
R/W
<5: Disabled
5 to 65535: Enabled
(units: seconds)
0: Default
257
(0x101)
1
Sets the Host Watchdog
Timer (WDT)
16
258
(0x102)
1
Host WDT Events
16
259
(0x103)
1
Module Name
16
If the PETL/tET/tPET module
loses communication with
the host PC for more than the
period defined in the WDT
settings, the DO channels will
revert to their safe values and
the Host WDT Events Counter
will be increased by one.
Denotes how many Host WDT
Events have occurred since
the last CPU reset
Module Name
R/W/F
R/W
R
<5: Disabled
263
(0x107)
1
Sets the TCP Timeout
Value
16
5 to 65535: Enabled
(units: seconds)
R/W/F
0:Default
<30: Disabled
264
(0x108)
1
Sets the System Timeout
Value
16
30~65535: Enabled
(unit: second)
R/W/F
0:default
“R”: Read;
Remarks
“W”: Write;
“F”: Setting is recorded in flash as default.
Warning: Frequent writing to the Flash can cause it to become corrupt.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 105
Ethernet I/O Modules
6.3.2
Specific Functions
The nDI and nDO parameters for each PETL/tET/tPET series module used in the following Modbus
Address Tables are as follows:
Model Name
Non-PoE Series
Number of DO Channels
Number of DI Channels
(nDO)
(nDI)
PoE Series
tET-P6
tPET-P6
0
6
tET-PD6
tPET-PD6
0
6
tET-C4
tPET-C4
4
0
tET-A4
tPET-A4
4
0
tET-P2C2
tPET-P2C2
2
2
tET-P2A2
tPET-P2A2
2
2
tET-P2POR2
tPET-P2POR2
2
2
tET-PD2POR2
tPET-PD2POR2
2
2
tET-P2R2
tPET-P2R2
2
2
tET-PD2R1
tPET-PD2R1
1
2
-
PETL-7060
6
6
 0xxxx: DO address (Base 0)
Starting
Address
0
(0x00)
32
(0x20)
33
(0x21)
34
(0x22)
60
(0x3C)
100
(0x64)
ICP DAS CO., LTD.
Points
1 to nDO
1
1
Description
Digital Output Channels
Clears the status of all high latched DI
Channels
Clears the status of all low latched DI
Channels
Bits per
Point
Range
Access
Type
1
0 = Off
1 = On
R/W
1
1 = Clear
W
1
1 = Clear
W
1 to nDI
Clears the high speed digital counter
for all DI Channels
1
1 = Clear
W
1
Saves specific data to Flash
(The access type for some registers is
labeled with an “E”)
1
1 = Clear
W
1
0 = Off
1 = On
(Default= 0)
1 to nDO
Enables the PWM for all DO Channels
R/W
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 106
Ethernet I/O Modules
150
(0x96)
151
(0x97)
190
(0xBE)
235
(0xEB)
267
(0x10B)
Remarks
1
Enables the high and low latches for
all DI Channels
1
1 to nDI
Enables the high speed digital counter
for all DI Channels
1
1 to nDI
Enables frequency measurement for
all DI Channels
1 to nDO
Sets the Power-on value for all DO
Channels
1 to 1DO
Sets the Safe value for all DO
Channels
0 = Disable
1 = Enable
(Default= 0)
0 = Disable
1 = Enable
(Default= 0)
R/W/F
R/W/F
1
0 = Disable
1 = Enable
(Default= 0)
R/W/F
1
0 = Off
1 = On
(Default= 0)
R/W/F
1
0 = Off
1 = On
(Default= 0)
R/W/F
“R”: Read
“W”: Write
“F”: Settings are recorded in flash by default
“E”: After writing DO[60] register, the data will be stored in flash.
Warning: Frequency writing to the Flash can cause it to become corrupt.
Note
Because of the characteristics of the relay functions, it is recommended that the PWM on
t(P)ET-P(D)2POR2/ t(P)ET-P2R2/ t(P)ET-PD2R1/ PETL-7060 series modules (i.e., modules with relay
functions) is not used for extended periods of time.
 1xxxx: DI address (Base 0)
Starting
Address
0
(0x00)
32
(0x20)
64
(0x40)
Remarks
ICP DAS CO., LTD.
Points
1 to nDI
1 to nDI
1 to nDI
Description
The status of all Digital Input
Channels
The status of all high latched DI
Channels
The status of all low latched DI
Channels
Bits per
Point
1
1
1
Range
0 = Off
1 = On
0 = None
1 = Latched
0 = None
1 = Latched
Access
Type
R
R
R
“R”: Read
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 107
Ethernet I/O Modules
 3xxxx: AI Address (Base 0)
Starting
Address
Points
16
(0x10)
1 to nDI
The Digital Counter Value
32
0 to
4294967296
R
1 to nDI
The frequency Value * 1,000.
(Note: The Client must first divide the
value by 1,000.)
32
0 to
4294967296
R
64
(0x40)
Description
Bits per
Point
Value
Access
Type
Note: The “DI Counter (0x10)” and “DI Frequency (0x40)”that the records data as 32-bit
value and is transmitted as two 16-bit registers .Consequently, the register address has an
offset of 2, i.e., the address of the second channel will be at starting-address +2, and so
on. You can refer to “FAQ: How do I read DI Counter for the PETL/tET/tPET Series Modules
correctly” for more detailed information.
Example: Reads the 6DI Counter on the tPET-P6.
[Leading 6 bytes]
[Request]
Command: 01 02 00 00 00 06
01 04 00 10 00 0C
Starting Address
100
(0x64)
110
(0x6E)
121
(0x79)
Remarks
ICP DAS CO., LTD.
6 channels * 2 registers
= 12 registers
1
Number of DI Channels
16
nDI
R
1
Number of DO Channels
16
nDO
R
1
Number of high-speed counters
16
nDI
R
“R”: Read
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 108
Ethernet I/O Modules
 4xxxx: AO Address (Base 0)
Starting
Address
50
(0x32)
Points
1 to nDI
Bits per
Point
Description
The preset value for the high speed
digital counter
0 to
4294967296
32
Access
Type
Range
R/W/E
Note: “Preset DI Counter Value (0x32)”that the records data as 32-bit value and is
transmitted as two 16-bit registers. Consequently, the register address has an offset of 2,
i.e., the address of the second channel will be at starting-address +2, and so on. You can
refer to “FAQ: How do I read DI Counter for the PETL/tET/tPET Series Modules correctly” for
more detailed information.
Example: Reads the preset value of 6DI Counter on the tPET-P6.
[Leading 6 bytes]
[Request]
Command: 01 02 00 00 00 06
01 04 00 32 00 0C
Starting Address
6 channels * 2 registers
= 12 registers
The duty cycle for the DO PWM
100
(0x64)
1 to nDO
150
(0x64)
1 to nDO
The first word (16-bit register) is
the high pulse width, while the
second word is the low pulse width.
The units rein ms, and the
resolution is about 10 ms.
The Scan mode for the DI
frequency measurement.
Refer to Section “DI/DO
Configuration” for more details.
32
0 to 65535;
0 to 65535;
R/W/E
1000= 1000ms
16
100= 100ms
R/W/F
2000=Single
pulse
1=No average
200
(0x64)
2=Average 2
values
The moving average of the DI
1 to nDO
frequency measurement.
16
4= Average 4
values
R/W/F
8=Average 8
values
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 109
Ethernet I/O Modules
268
(0x10C)
1 to nDO
The Min-Switching Time for all DO
Channels
16
1 to
second
65535
284
(0x11C)
1 to nDO
The Auto-off Time for all DO
Channels
16
1 to
second
65535
Remarks
R/W/F
R/W/F
“R”: Read
“W”: Write
“F”: Settings are recorded in flash by default
“E”: After writing the DO[60] register, the data will be stored in flash.
Warning: Frequent writing to the Flash can cause it to become corrupt.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 110
Ethernet I/O Modules
7. Related Tools
7.1 LabVIEW
LabVIEW is a system-design platform and development
environment and is ideal for acquiring, analyzing, and
presenting data. LabVIEW provides a graphical
development environment that allows you to drag and
drop pre-built objects to quickly create data acquisition,
instrumentation and control systems, thereby boosting
productivity and reducing development time. LabVIEW
makes it possible to quickly create user interfaces that
enable interactive control of software systems then
specify the functionality of your system, by simply assembling a block diagram, which is a natural
design notation for scientists and engineers.
A document that describes how to link LabVIEW to a PETL/tET/tPET device using the Modbus protocol
can be found at:
http://ftp.icpdas.com/pub/cd/6000cd/napdos/et7000/document/application/labview/labview_modb
us_eng.pdf
7.2 OPC Server
OPC (OLE for Process Control) was the first standard resulting from the collaboration of a number of
leading worldwide automation suppliers working in cooperation with Microsoft. Originally based on
Microsoft's OLE COM (Component Object Model) and DCOM (Distributed Component Object Model)
technologies, the specification defines a standard set of objects, interfaces and methods for use in
process control and manufacturing automation applications to facilitate interoperability.
A wide range of different mechanisms are provided by various vendors that allow access to a variety
of devices via specific applications. However, if an OPC server is provided for the device, other
applications will also be able to access the device via the OPC interface.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 111
Ethernet I/O Modules
7.3 SCADA
SCADA stands for Supervisor Control and Data Acquisition and is a PC-based production automation
and control system.
SCADA is widely used in many fields, including power generation, water systems, the oil industry, the
chemical, and the automobile industry. Different fields require different functions, but they all have
the same common requirements:
 Graphical interface
 Process mimicking
 Real-time and historical trend data
 Alarm systems
 Data acquisition and recording
 Data analysis
 Report generation
Accessing the PETL/tET/tPET Series Module
SCADA software is able to access PETL/tET/tPET series devices using the Modbus communication
protocol without the need for other software drivers.
Popular SCADA Software
Some of the more popular SCADA software includes Citect, ICONICS, iFIX, InduSoft, Intouch, Entivity
Studio, Entivity Live, Entivity VLC, Trace Mode, Wizcon, and Wonderware, etc.
In the following sections, three popular brands of SCADA software are introduced, together with
detailed instructions of how to use them to communicate with PETL/tET/tPET series modules using
the Modbus TCP protocol.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 112
Ethernet I/O Modules
 InduSoft
InduSoft Web Studio is a powerful, integrated collection of
automation tools that includes all the building blocks needed to
develop modern Human Machine Interfaces (HMI), Supervisory
Control and Data Acquisition (SCADA) systems, and embedded
instrumentation and control applications. InduSoft Web Studio’s
application runs in native Windows NT, 2000, XP, CE and CE .NET
environments and conforms to industry standards such as
Microsoft .NET, OPC, DDE, ODBC, XML, and ActiveX.
The document describing how to link InduSoft to the PETL/tET/tPET series module using the Modbus
protocol is located at:
http://ftp.icpdas.com/pub/cd/6000cd/napdos/et7000/document/application/indusoft/indusoft_mod
bus_eng.pdf
 Citect
Citect SCADA is a fully integrated Human Machine Interface (HMI) /
SCADA solution that enables users to increase return on assets by
delivering a highly scalable, reliable control and monitoring system.
Easy-to-use configuration tools and powerful features enable the rapid
development and deployment of solutions for applications of any size.
The document describing how to link Citect to the PETL/tET/tPET module using the Modbus protocol
is located on
http://ftp.icpdas.com/pub/cd/6000cd/napdos/et7000/document/application/ifix/ifix_mbtcp.pdf
 iFix
The document describing how to link iFix to the PETL/tET/tPET series
module using the Modbus protocol is located at:
http://ftp.icpdas.com/pub/cd/6000cd/napdos/et7000/document/appli
cation/citect/citect_mbtcp.pdf
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 113
Ethernet I/O Modules
Appendix: Troubleshooting
How do I restore the web password for the module to the factory default
password?
The instructions below outline the procedure for resetting the web password to the factory default
value.
Note: Be aware that ALL settings will be restored to the factory default values after the module is
reset.
Step 1 Locate the Init/Run switch that can be found on
the top side of the PETL/tET/tPET module and set it to the
"Init" position. Reboot the module to load factory
default settings including default web password.
Step 2 Execute either the VxComm Utility or the eSearch Utility to search for any PETL/tET/tPET
modules connected to the network. Verify that the PETL/tET/tPET has been reset to the original
factory default settings. For example, the module should be shown as having the default IP address,
which is 192.168.255.1.
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 114
Ethernet I/O Modules
Step 3 Double-click the name of the module to open the Configure Server (UDP) dialog box, and
modify the basic settings as necessary, e.g., the IP, Mask and Gateway addresses, and then click the
"OK" button to save the new settings.
Step 4 Reset the Init/Run switch on the PETL/tET/tPET module to
the "Run" position and reboot the device.
Step 5 Log in to the web configuration pages for the PETL/tET/tPET module, using the default web
password, "Admin".
ICP DAS CO., LTD.
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 115
Ethernet I/O Modules
Appendix B: Revision History
This chapter provides revision history information to this document.
The table below shows the revision history.
Revision
Date
Description
1.0
Mar. 2011
Initial issue
1.6
July 2013
1. Added the software and hardware information about the
tET/tPET-PD6.
2. Added the software and hardware information about the
tET/tPET-PD2POR2.
3. Added the software and hardware information about the
tET/tPET-PD2R1.
2.2
Aug.2017
4. Updated the information about the Firmware Version v1.4.6
[Jun.16, 2017] in Chapter 4 Web Configuration.
5. Added Chapter Appendix A: Troubleshooting.
6. Added Chapter Appendix B: Revision History.
2.2.1
ICP DAS CO., LTD.
Mar.2018
Remove the package CD
PETL/tET/tPET DIO Series User Manual, Ver. 2.2, Aug. 2017, Page: 116
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