ProSoft Technology MVI56E-MCM/MCMXT - Manual (Page 116)

Reference MVI56E-MCM ♦ ControlLogix Platform
User Manual Modbus Communication Module
Page 116 of 199 ProSoft Technology, Inc.
June 18, 2014
 CIPconnect ® -enabled network diagnostics and monitoring using ControlLogix
1756-ENxT modules and EtherNet/IP
®
pass-thru communications
 Sample Ladder Logic or Add-On Instruction (AOI) used for data transfers
between module and processor and for module configuration
 4-character, scrolling, alphanumeric LED display of status and diagnostic
data in plain English
 ProSoft Discovery Service (PDS) software finds the module on the network
and assigns a temporary IP address to facilitate module access
6.1.2 General Specifications - Modbus Master/Slave
Communication
Parameters Baud rate: 110 to 115K baud
Stop bits: 1 or 2
Data size: 7 or 8 bits
Parity: None, Even, Odd
RTS timing delays: 0 to 65535 milliseconds
Modbus Modes RTU mode (binary) with CRC-16
ASCII mode with LRC error checking
Floating-Point
Data Floating-point data movement supported, including configurable
support for Enron, Daniel
®
, and other implementations
Modbus Function
Codes Supported 1: Read Coil Status
2: Read Input Status
3: Read Holding Registers
4: Read Input Registers
5: Force (Write) Single Coil
6: Preset (Write) Single
Holding Register
8: Diagnostics (Slave Only,
Responds to
Subfunction 00) 15: Force( Write) Multiple Coils
16: Preset (Write) Multiple
Holding Registers
17: Report Slave ID (Slave Only)
22: Mask Write Holding
Register (Slave Only)
23: Read/Write Holding
Registers (Slave Only)
6.1.3 Functional Specifications
The MVI56E-MCM will operate on a Local or Remote rack (For remote rack
applications with smaller data packet size please refer to the MVI56E-MCMR
product)
 CIPconnect
® enabled for module and network configuration using 1756-ENxT
module with EtherNet/IP pass-through communications
 Supports Enron version of Modbus protocol for floating-point data
transactions
 4-digit LED Display for English based status and diagnostics information
 PCB includes powerful Modbus network analyzer
 Error codes, network error counters, and port status data available in user
data memory