Mnet Client X Commands - ProSoft MVI56E-MNETCR User Manual

MVI56E-MNETCR ♦ ControlLogix Platform
Modbus TCP/IP Multi-Client Enhanced Communications Module for Remote Chassis

2.2.6 MNET Client x Commands

The MNET Client x Commands section of the configuration sets the Modbus
TCP/IP Client command list. This command list polls Modbus TCP/IP server
devices attached to the Modbus TCP/IP Client port. The module supports
numerous commands. This permits the module to interface with a wide variety of
Modbus TCP/IP protocol devices.
The function codes used for each command are those specified in the Modbus
protocol. Each command list record has the same format. The first part of the
record contains the information relating to the MVI56E-MNETCR communication
module, and the second part contains information required to interface to the
Modbus TCP/IP server device.
Command List Overview
In order to interface the module with Modbus TCP/IP server devices, you must
construct a command list. The commands in the list specify the server device to
be addressed, the function to be performed (read or write), the data area in the
device to interface with, and the registers in the internal database to be
associated with the device data. The Client command list supports up to 16
commands.
The command list is processed from top (command #1) to bottom. A poll interval
parameter is associated with each command to specify a minimum delay time in
tenths of a second between the issuances of a command. If the user specifies a
value of 10 for the parameter, the command will be executed no more frequently
than every 1 second.
Commands 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 functions supported by the module.
Function Code
1
2
3
4
5
6
15
16
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 TCP/IP
server device.
ProSoft Technology, Inc.
Definition
Read Coil Status
Read Input Status
Read Holding Registers
Read Input Registers
Force (Write) Single Coil
Preset (Write) Single Register
Force (Write) Multiple Coils
Preset (Write) Multiple Registers
Configuring the MVI56E-MNETCR Module
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