Protocol-Specific Information; Modbus/Tcp Server; Overview - Mitsubishi 700 Series Instruction Manual

9

PROTOCOL-SPECIFIC INFORMATION

This section will discuss topics that are specific to each of the supported protocols.
9.1

Modbus/TCP Server

9.1.1 Overview

The interface card supports
Schneider Electric's Modbus/TCP
protocol, release 1.0. The interface is
conformance class 0 and partial
class 1 and class 2 compliant, and
allows up to 8 simultaneous
Modbus/TCP client connections
(sockets).
Other notes of interest include:
Supported Modbus/TCP
•
functions are indicated in Table
26.
• The register mapping is provided
in section 4.1.
PROTOCOL-SPECIFIC INFORMATION
Table 26: Supported Modbus/TCP Functions
Function
Code
1 Read coils
2 Read input status
3 Read multiple registers
4 Read input registers
5 Write coil
6 Write single register
8 Diagnostics (subfunction 0 only)
15 Force multiple coils
16 Write multiple registers
Function
Modbus/TCP
Class
1
1
0
1
1
1
-
9
2
0
105