ProSoft Technology 5301-MBP-ASCII - Manual (Page 18)

Port Physical and Protocol Specifications MBP ♦ ProLinx Gateway
Protocol Manual Modbus Plus
Page 18 of 52 ProSoft Technology, Inc.
May 12, 2011
2.1 Functional Specifications - Modbus Plus
The Modbus Plus (MBP) protocol driver operates as a single, peer-to-peer
Modbus Plus port with dual media-redundant connectors. The two connectors
cannot be configured as separate MBP ports. They are for physical cabling
redundancy only.
General Parameters
Modbus Function
Codes 3: Read Multiple Data Registers (MSTR 2)
16: Write Multiple Data Register (MSTR 1)
Global data read (32 words per node max.)
Global data write (32 words per node max.)
Address Scope 1 to 64
Modbus Plus Functioning as a Master
Command List Up to 200 commands on the master port, fully configurable for function,
slave address, register to/from addressing and word count
Polling of command list Configurable polling of command list, including continuous read or write
commands and write on change of data (Function Code 16 Write
command only)"
Modbus Plus Functioning as a Slave
Node address 1 to 64 (software selectable)