ProSoft Technology MVI69L-MBS - Manual (Page 104)

Reference MVI69L-MBS ♦ CompactLogix Platform
User Manual Communication Module
Page 104 of 154 ProSoft Technology, Inc.
January 6, 2014
7.1 Product Specifications
The MVI69L-MBS (Modbus Master/Slave Communication Module) allows
Rockwell Automation CompactLogix I/O compatible processors to interface easily
with other Modbus protocol compatible devices.
The module acts as an input/output communications module between the
Modbus network and the CompactLogix backplane. The data transfer from the
CompactLogix processor is asynchronous from the actions on the Modbus
network. Databases are user-defined and stored in the module to hold the data
required by the protocol.
 Single-slot, 1769 backplane-compatible
 The module is recognized as an Input/Output module and has access to
processor memory for data transfer between processor and module.
 Ladder Logic is used for data transfer between module and processor.
Sample Add-On Instruction file included.
 Configuration data obtained from and stored in the processor.
 Supports CompactLogix processors with 1769 I/O bus capability and at least
800 mA of 5 Vdc backplane current available.
7.1.1 General Specifications - Modbus Master/Slave
Specification Description
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)