ABB AC 800M Installation Manual

9ARD000015-600 75
Section 4 Troubleshooting
This section describes about the various points which needs to be considered for
troubleshooting and commissioning.
The following points are to be taken care before setting up the system design for
installation:
• Check number of nodes.
• Check cumulative drop length.
• Check individual drop lengths.
• Check branched drop length.
• Check total trunk length, including long drop near the ends.
• Check the termination location and measure the terminators.
• Check the power supply cable length and gauge.
• Check for one, and only one, earth ground of the V- and shield.
• Break the combination shield/V- connection to frame ground and verify
>1.0 Mohm to frame ground.
• Check for one and only one V- to shield connection.
• Break the shield/V- connection at the power supply and verify >1.0 Mohm
shield to V- with 24VDC off.
• Check for shorts of CAN- and/or CAN+ to shield or V- verify with an OHM
meter.
• Check the length and gauge of the earth ground connection.
• Check total power load and its distribution points.

ABB AC 800M Specifications

General

Brand	ABB
Model	AC 800M
Category	Controller
Language	English