YOKOGAWA F3SP71-4S, User Manual

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TOC-1
IM 34M06P15-03E 2nd Edition
FA-M3
Sequence CPU - Modbus/TCP Functions
CONTENTS
Applicable Product ....................................................................................i
Important ...................................................................................................ii
Introduction............................................................................................viii
Copyrights and Trademarks ...................................................................ix
1.
Overview ....................................................................................... 1-1
1.1 Overview of Modbus/TCP Slave Function ............................................ 1-1
1.2 System Configuration of Modbus/TCP Slave Function....................... 1-2
2. Modbus/TCP Slave Function ....................................................... 2-1
2.1 Specifications .......................................................................................... 2-1
„ Functional Specifications.................................................................... 2-1
„ Communication Functions.................................................................. 2-1
2.2 Communication Protocol........................................................................ 2-1
2.3 Data Frames ............................................................................................ 2-2
2.4 Function Codes ....................................................................................... 2-3
„ Support Function Codes .................................................................... 2-3
„ PDU Configuration ............................................................................. 2-4
2.5 Response Error Code ............................................................................. 2-5
2.6 Modbus Device Allocation Specifications ........................................... 2-6
„ Modbus Device List............................................................................ 2-6
„ Modbus Device Associations ............................................................. 2-7
2.7 Specifying Devices in Commands....................................................... 2-12
„ List of Supported Devices ................................................................ 2-12
2.8 Modbus/TCP Slave Function Settings................................................ 2-13
„ Required Settings............................................................................. 2-13
„ Settings Specified as Necessary...................................................... 2-14
2.9 Using Modbus/TCP Slave Function via Ethernet .............................. 2-15
„ Connecting to a Monitor ................................................................... 2-15
„ Connecting to a PC .......................................................................... 2-15
3. Command/Response Details ....................................................... 3-1
3.1 Read Coils ($01) ...................................................................................... 3-1
3.2 Read Discrete Inputs ($02) ..................................................................... 3-2
3.3 Read Holding Registers ($03) ................................................................ 3-3
IM 34M06P15-03E 2nd Edition: Jan. 31, 2012-00