ProSoft Technology 5301-MBP-ASCII - Manual (Page 10)

Functional Overview MBP ♦ ProLinx Gateway
Protocol Manual Modbus Plus
Page 10 of 52 ProSoft Technology, Inc.
May 12, 2011
1.2.2 Modbus Plus Master Access to Database
The Master functionality exchanges data between MBP module's internal
database and data tables established in one or more Modicon processors or
other Modbus Plus slave devices. The command list, defined in the user
configuration, defines what data to transfer between the module and each of the
slaves on the network. No ladder logic is required in the processor for master
functionality, except to assure that sufficient data memory exists.
The following illustration describes the flow of data between the Modbus Plus
devices and the internal database.