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1 Communications Methods
1 - 2
E5C-T Digital Controllers Programmable Type Communications Manual (H186)
1-1 Overview of Communications
Methods
The program for the communications functions is created on the host (personal computer, PLC, or other
type of communications master), and the E5@C-T's parameters are monitored or set from the host.
Therefore, the description provided here is from the viewpoint of the host.
CompoWay/F is OMRON's standard communications format for general serial communications. This
format uses a standard frame format as well as the well-established FINS* commands used for
OMRON's PLCs. Therefore, it can simplify communications between components and the host.
* FINS (Factory Interface Network service)
The FINS protocol provides message communications between controllers in OMRON FA networks.
Modbus is a standard communications control method that conforms to the Modicon Company's
RTU-mode Modbus Protocol (PI-MBUS-300 Revision J). Modbus is a registered trademark of
Schneider Electric.
It supports functions equivalent to the CompoWay/F Read Variable Area, Write Variable Area, Opera-
tion Command, and Echoback Test functions.
The E5@C-T supports the following communications functions.
• Reading/writing of parameters
• Operation instructions
• Selection of setup levels
Communications are subject to the following condition:
• Parameters can be written only when the Communications Writing parameter is set to ON (enabled).
* Communications baud rate, data length, stop bits and vertical parity can each be set independently in the
communications setting level. Highlighted values indicate default settings.
1-1-1 Introduction
1-1-2 Communications Specifications
Transmission line connection RS-485: Multidrop
Communications method RS-485 (2-wire, half-duplex)
Synchronization method Start-stop synchronization
Communications baud rate * 9,600, 19,200, 38,400 or 57,600 bps
Communications code ASCII
Communications data length * 7 or 8 bits
Communications stop bits * 1 or 2 bits
Error detection
Vertical parity (none, even, or odd) *
BCC (Block Check Character) with CompoWay/F communications
CRC-16 (Cyclic Redundancy Check 16) with Modbus
communications
Flow control None
Interface RS-485
Retry function None
Communications buffer 217 bytes
Send data wait time 0 to 99 ms, default time: 20 ms
- Programmable Type 1
- Preface 3
- © OMRON, 2014 3
- Warranties 4
- Limitation on Liability; Etc 4
- Safety Precautions 6
- CAUTION 7
- Precautions for Safe Use 9
- Precautions for Safe Use 10
- Trademarks 11
- Versions 12
- Revision History 13
- Revision History 14
- Sections in This Manual 15
- CONTENTS 16
- Section A Appendices 18
- Communications Methods 19
- 1-1-1 Introduction 20
- 1-1-3 Transmission Procedure 21
- 1-1-4 Interface 21
- 1-1-5 Wiring 21
- 1 Communications Methods 22
- CompoWay/F Communications 25
- Procedures 25
- 2-1 Data Format 26
- 2-1-2 BCC Calculation Example 27
- 2-1-3 Response Frame 27
- 2-1-4 Communications Data 28
- 2-1-5 End Code Example 28
- 2-1 Data Format 29
- 2-1-5 End Code Example 29
- 2-2 Structure of Command Text 30
- 2-2-4 Addresses 31
- 2-2-5 Number of Elements 31
- Variable 32
- 2-3-2 Write Variable Area 33
- Response 36
- -5CCT AEX3R 38
- 2-3-7 Echoback Test 39
- (2) Response Code 40
- • Normal Completion 40
- • Error Occurred 40
- 2-3-8 Operation Command 41
- 2-3-8 Operation Command 43
- 2-4 Response Code List 46
- Communications Data for 47
- CompoWay/F 47
- 3-2 Status and Status 2 77
- 3-2 Status and Status 2 79
- Modbus Communications 81
- Procedure 81
- 4-1 Data Format 82
- 4-1 Data Format 83
- 4-1-1 Command Frame 83
- 4-1-2 Response Frame 84
- 4-1-3 Error Codes 85
- 4-2 Function List 86
- 4-3 Variable Area 87
- 4-4-1 Variable Read, Multiple 88
- Response Frame 89
- Response Code 89
- H'10 90
- Command Frame 92
- 4-4-4 Echoback Test 94
- PID set is fixed at PID1 98
- 5-2 Status 115
- Programless Communications 117
- 6-1-1 Introduction 119
- 6-1-2 Features 119
- 6-1-5 Connectable PLCs 121
- 6-2 E5@C-T Controller Setup 122
- 6-2-3 Send Data Wait Time 123
- Communications Setting Level 125
- 6-2-6 Receive Data Wait Time 126
- 6-2 E5@C-T Controller Setup 129
- Troubleshooting 133
- 6-2-10 Communications Writing 134
- 6-3 Controlling Programless 136
- Communications 136
- 6-3-2 Response Flag 137
- 6-3-4 Operation Command Codes 138
- 6-3-6 Write Mode 138
- 6-3-7 Troubleshooting 139
- CX-Programmer and USB driver 140
- 6-4-3 PLC Setup 141
- 6-4-3 PLC Setup 143
- 6-4-4 E5@C-T Controller Setup 144
- SCU21-V1 145
- 6-4-5 Checking Operation 146
- 6-4-5 Checking Operation 147
- Changing E5CC-T Settings 148
- Connecting to the PLC 152
- 6-5-3 PLC Setup 152
- 6-5-3 PLC Setup 153
- 6-5-4 E5@C-T Controller Setup 155
- 6-5-5 Checking Operation 155
- USB port 156
- USB connector 156
- Commercially 156
- QJ71C24N-R4 157
- (4) Click the OK Button 158
- (5) Click the Execute Button 158
- 6-6-3 PLC Setup 159
- 6-6-4 E5@C-T Controller Setup 162
- 6-6-5 Checking Operation 163
- 6-6-5 Checking Operation 165
- Component Communications 169
- 7-1 Component Communications 170
- 7-1-2 Wiring 171
- Initial Setting Level 172
- Operation Level 172
- Adjustment Level 172
- 7 Component Communications 173
- 7-2 Operation for Component 174
- 7-3 Troubleshooting 175
- Appendices 177
- A-1 ASCII List 178
- A-2 Troubleshooting 179
- A Appendices 180
- Contact: www.ia.omron.com 186
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