ProSoft Technology 5301-MBP-ASCII - Manual (Page 11)

MBP ♦ ProLinx Gateway Functional Overview
Modbus Plus Protocol Manual
ProSoft Technology, Inc. Page 11 of 52
May 12, 2011
1.2.3 Modbus Plus Slave Access to Database
The MBP module supports slave functionality using the Modbus Plus protocol.
Services supported in the module permit Modbus Plus master applications (that
is, HMI software applications, Modicon processors, and so on) to read from and
write to the module's database. This section discusses the requirements for
attaching to the module using several Modbus Plus master applications.
There is no configuration of the MBP module required to implement Slave
functionality other than setting up the network and database parameters in the
user configuration file.
The internal database of the MBP module is used as the source (read requests)
and destination (write requests) for requests from remote masters. Access to the
database depends on the command type executed to interface with the
database. The following table defines the relationship of the module's internal
database to the addresses required in the instructions:
Database Address Modbus Address
0 40001
1000 41001
2000 42001
3000 43001
4000 44001
5000 45001
6000 46001
7000 47001
8000 48001
9000 49001
9999 50000
Before attempting to use the module on a network, verify that the MBP module is
correctly configured and connected to the network. Use ProSoft Configuration
Builder to confirm proper configuration of the module, and to transfer the
configuration files to and from the module.