ProSoft Technology 3170-MBS - Manual (Page 9)

3170-MBS ♦ Flex Platform Product Specifications
Modbus Slave Interface Module User Manual
ProSoft Technology, Inc. Page 9 of 55
October 27, 2010
1.2 Modbus Specifications
The 3170-MBS product support the following features:
RTU mode (binary) with CRC-16 error checking
ASCII 7 and 8-bit modes with LRC error checking
Accepts broadcast commands from the Master
Function codes:
1: Read Output Coils (Horizontal addressing only)
2: Read Discrete Inputs (Horizontal addressing only)
3: Read Multiple Holding Registers
4: Read Multiple Input Registers
5: Force (Write) Single Coil (Horizontal addressing only)
6: Preset (Write) Single Holding Register
16: Preset (Write) Multiple Holding Registers
Pre-assigned Modbus memory map
Parameters configured via dip switches:
o
Address: 1 to 247
o
Parity: None, Odd or Even
o
Stop Bits: 1 or 2
o
Baud Rate: 1200, 2400, 4800, 9600, 19200, 38400, 62500