Reference MVI56E-MNETC/MNETCXT ♦ ControlLogix Platform
User Manual Modbus TCP/IP Client Enhanced Communication Module - Client/Server
Page 102 of 172 ProSoft Technology, Inc.
September 20, 2018
ProSoft Discovery Service (PDS) software used to locate the module on the
network and assign temporary IP address
Personality Module - a non-volatile industrial-grade Compact Flash (CF) card
used to store network and module configuration for easy disaster recovery,
allowing quick in-the-field product replacement by transferring the CF card
Modbus TCP/IP Specifications
ProSoft Technology’s Modbus TCP/IP implementation (MNET) includes both
Client (Master) and server (slave) capabilities.
Modbus TCP/IP Server (Slave)
Supports ten independent server connections for Service Port 502 (MBAP)
Supports ten independent server connections for Service Port 2000
(Encapsulated)
Accepts Modbus Function Codes 1, 2, 3, 4, 5, 6, 7, 8, 15, 16, 17, 22 and 23
Module data can be derived from other Modbus server devices on the
network through the Client or from the ControlLogix processor
Modbus TCP/IP Client (Master)
Offers 30 Client connections with up to 16 commands each to talk to multiple
servers
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
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 (Event Commands, Command Control, 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 servers, through the Clients, or through the ladder logic and
controller tags in RSLogix 5000
5.1.3 Hardware Specifications