ProSoft Technology MVI94-MCM-MHI - Manual (Page 66)

Reference MVI94-MCM ♦ Flex I/O Platform
User Manual Serial Communications Modbus Communication Module
Page 66 of 109 ProSoft Technology, Inc.
March 29, 2011
5.1.2 FLEX I/O Interfaces
Specification Description
Form Factor Single Slot 1794 Backplane compatible
Locate in any slot of Backplane
Backplane current load 20 mA @ 5 V
External power supply 12 Vdc to 24 Vdc
340 mA to 170 mA
Operating temperature 0°C to 55°C (32°F to 131°F)
Storage temperature -40°C to 85°C (-40°F to 185°F)
Shock 30 g operational
50 g non-operational
5 g from 10150 Hz
Relative humidity 5% to 95% (without condensation)
LED indicators Module status
Backplane transfer status
Application status
Serial activity and error LED status
Configuration Serial port (PRT1) Mini-DIN
RS-232
Hardware handshaking
Application serial Port (PRT2) Mini-DIN
RS-232/422/485 jumper selectable
500V optical isolation from backplane
Dimensions (with Module
installed in Base)
3.7H x 3.7W x 2.7D inches
94H x 94W x 69D mm
5.1.3 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)