ABB ACH 400, Руководство пользователя

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ACS/ACH 400 Direct N2 Bus Interface 5-1
Chapter 5 – Fault Tracing
This chapter describes troubleshooting
procedures for the N2 Bus installation using
diagnostics counters, fault queues, and drive
status displays. Possible fault origins are also
addressed.
Fault Diagnostics
This chapter concentrates on the problems and
possible remedies for the serial communication
connection for the ACS/ACH 400 N2 Bus. For
other general fault diagnostics with the ACS/
ACH 400 drives, please consult the
appropriate product
manual.
Network problems can be caused by multiple
sources. Some of these include:
• Loose connections
• Incorrect wiring, including swapped
wires
• Bad grounding
• Duplicate station numbers
• Incorrect programming and setup for
drives or other devices on the network
The major diagnostic features for fault tracing
on the network include Group 53 OEM
APPLICATION parameters 6 GOOD
MESSAGE COUNTER and 7 BAD MESSAGE
COUNTER.
This chapter will list some possible
communication problems, how to identify them,
and will list some possible corrections.
Normal operation
During normal operation of the network, the
GOOD MESSAGE COUNTER should
constantly advance on all the stations, and the
BAD MESSAGE COUNTER should not
advance at all.