Hardware reference guide

Network Configurations
35013379 02 October 2007 51
Bridging between Modbus and Modbus Plus is done automatically on CPUs and
Modbus Plus network modules.
The bridge mode redirects Modbus messages onto the Modbus Plus network for
easy connectivity between Modbus and Modbus Plus devices.
A summary of the available services on Quantum Modbus and Modbus Plus ports
is given in the following table.
Modbus and
Modbus Plus
Services
The following table shows the Quantum Modbus and Modbus Plus services.
Type Service Description Native CPU Ports NOM 1-2 Ports NOM 3-6 Ports
Modbus Modbus
Plus
Modbus Modbus
Plus
Modbus Modbu
s Plus
Modbus
Services
Default Modbus Port Parameters Y - Y - Y -
Configurable Modbus Port Parameters Y - Y - -
Modbus to Modbus Plus Bridging - - -
Local CPU Programming - - N -
Remote CPU Programming over
Modbus Plus
---
Modbus access to local CPU Y - Y - N -
Modbus access to remote CPU over
Modbus Plus
Y- Y- Y-
Modbus Network Slave Support Y - N - N -
Modbus Master support with XMIT
Loadable
Y- N- N-
Executive Firmware Loading Support Y - N - N -
Y
5
Y
2
Y
3
Y
3
Y
4
Y
4
Y
4
Y
4
Y
2
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com