Reference MVI69E-MBS ♦ CompactLogix Platform
User Manual Modbus Serial Enhanced Communication Module
Page 104 of 154 ProSoft Technology, Inc.
June 28, 2017
7.1.1 Hardware Specifications
Standard 1769 Single-slot module
500 mA max @ 5 VDC
Power supply distance rating of 4 (L43 and L45
installations on first 4 slots of 1769 bus)
32° F to 140° F (0° C to 60°C)
-40° F to 185° F (-40° C to 85° C)
5% to 95% (with no condensation)
Module OK Status
Backplane Activity
Ethernet Port Activity
Configuration Activity
Diagnostics over Ethernet connection
RS-232, RS-485 or RS-422 (jumper selectable)
RJ45 Port (DB-9F with supplied cable)
500V Optical isolation from backplane
RJ45 to DB-9M cables for each application port
7.1.2 General Specifications - Modbus Master/Slave
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
RTU mode (binary) with CRC-16
ASCII mode with LRC error checking
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)