Modbus PLC

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MODBUS PLC Test Suite Data Sheet

Test Suite:

MODBUS PLC Test Suite

Direction:

Server

MODBUS is an application layer messaging protocol, positioned at level 7 of the OSI model, that provides client/server communication between devices connected on different types of buses or networks. MODBUS is a request/reply protocol and offers services specified by function codes. MODBUS function codes are elements of MODBUS request/reply PDUs. MODBUS TCP is an encapsulation method for MODBUS that provides support and transfer for most MODBUS functionalities.

Used specifications

Specification

Title

MODBUS

MODBUS APPLICATION PROTOCOL SPECIFICATION v1.1b

MODBUS TCP/IP

Modbus Messaging Implementation Guide v1.0b

Tool-specific information

Tested messages

Notes

Specifications

Read Coils