ProSoft Technology MVI69E-MBTCP - Manual (Page 110)

Reference MVI69E-MBTCP ♦ CompactLogix Platform
User Manual Modbus TCP/IP Enhanced Communication Module
Page 110 of 150 ProSoft Technology, Inc.
May 20, 2015
7.2.2 Modbus Server
The MVI69E-MBTCP Modbus Server driver permits a remote client to interact
with all data contained in the module. This data can be derived from other
Modbus server devices on the network, through a client port, or from the
CompactLogix processor.
Service Port MBAP messaging on Service Port 502
Encapsulated messaging on Service Port 2000
Status Data Error codes, counters and port status available
7.2.3 Function Codes Supported by the Module
The format of each command in the list depends on the Modbus Function Code
being executed. The following table lists the Function Codes supported by the
MVI69E-MBTCP module.
Function Code Definition Supported as Client Supported as Server
1 Read Coil Status 0x X X
2 Read Input Status 1x X X
3 Read Holding Registers 4x X X
4 Read Input Registers 3x X X
5 Set Single Coil 0x X X
6 Single Register Write 4x X X
8 Diagnostics X
15 Multiple Coil Write 0x X X
16 Multiple Register Write 4x X X
17 Report Server ID X
22 Mask Write 4X X
23 Read/Write X
Each command list record has the same general format. The first part of the
record contains the information relating to the communication module and the
second part contains information required to interface to the Modbus server
device.