ProSoft Technology MVI56E-MNETCR - Manual (Page 95)

MVI56E-MNETCR ♦ ControlLogix Platform Reference
Modbus TCP/IP Multi Client Enhanced Communications Module for Remote Chassis User Manual
ProSoft Technology, Inc. Page 95 of 159
June 14, 2011
Modbus TCP/IP Client (Master)
The MVI56E-MNETCR is a Client-only module that will operate on a local or
remote rack. This module was created to improve performance when controlling
multiple servers on a Modbus TCP/IP network. The module supports up to 30
Clients with up to 16 commands for each Client.
Actively reads data from and writes data to Modbus TCP/IP devices, using
MBAP or Encapsulated Modbus message formats
Transmits Modbus Function Codes 1, 2, 3, 4, 5, 6, 7, 15, and 16
Offers 30 Client connections with up to 16 commands each to talk to multiple
servers
ControlLogix processor can be programmed to use special functions to
control the activity on the Client by actively selecting commands to execute
from the command list (Command Control) or by issuing commands directly
from the ladder logic (Event Commands)
5.1.2 Functional Specifications
Modbus data types overlap in the module's memory database, so the same
data can be conveniently read or written as bit-level or register-level data.
Configurable floating point data movement is supported, including support for
Enron or Daniel ® floating point formats
Special functions (Command Control, Event Commands, status, etc.) are
supported by message transfer (unscheduled) using the MSG instruction
Configurable parameters for the Client including a minimum response delay
of 0 to 65535 ms and floating point support
Supports up to 30 Clients with up to 16 commands for each Client
Error codes, counters, and module status available from module memory
through the Clients, or through the ladder logic and controller tags in
RSLogix 5000