Browse FAQs

Modbus Plus + Network Troubleshooting

Published date: 17 August 2019

All maintenance issues for MB+ comms are related to the physical cabling, connections (taps) & terminating resistors.
There are 2 Manuals linked below which will assist with trouble-shooting the network - ultimately signal analysis is the best diagnostic method if cabling issues cannot be discovered through observation.

You will be performing the following actions to install and check the cable:
Route the cable in accordance with the layout diagram described in Chapter 4.
At each cable drop location except the two extreme ends, connect the cable signal conductors and shield to an inline connector.
At the cable drop locations at the two extreme ends, connect the cable signal conductors and shield to a terminating connector.
If the network node devices are installed, check that each one is grounded to a proper site ground.
Label the cable segments to assist in future maintenance.
Inspect the cable run and check the cable’s continuity before connecting it to the network node devices. signal analyser)...

http://download.schneider-electric.com/files?p_File_Id=28871477&p_File_Name=35006188_K01_000_09.pdf
http://www.schneider-electric.cn/downloads//85257689000007EE/All/B1F7510F1A29DD46852576B2006B5A17/$File/40-Modicon-EN.pdf

Was this helpful?

What can we do to improve the information ?

Can't find what you are looking for?

Reach out to our customer care team to receive information on technical support, assistance for complaints and more.