ABB ACH 400, Руководство пользователя

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Chapter 5 – Fault Tracing
5-2 ACS/ACH 400 Direct N2 Bus Interface
If problems exist, the BAD MESSAGE
COUNTER will advance whenever a bad
message packet is received, and the GOOD
MESSAGE COUNTER will advance for each
good message packet received.
No Metasys station on
line
How to diagnose: Neither the GOOD
MESSAGE COUNTER nor the BAD
MESSAGE COUNTER increases on any of the
stations.
How to correct: Check that the Metasys is
connected and properly programmed on the
network. Verify that the cable is connected, and
is not cut or short circuited. If parameter 5309 is
showing 1, set the drive’s node address with
parameter 5302 and cycle the drive’s input
power.
Duplicate station
How to diagnose: Two or more drives cannot
be addressed. Every time there is a read or
write to one given station, the BAD MESSAGE
COUNTER advances.
How to correct: Verify the station numbers of all
stations. Change conflicting station numbers.
Swapped wires
How to diagnose: The GOOD MESSAGE
COUNTER is not advancing. The BAD
MESSAGE COUNTER is advancing. Protocol
Error Code is 3 = Line Break.
How to correct: Check that the RS-485 lines
are not swapped.
Oem Application Fault
The OEM APPLICATION fault text is displayed
on the drive’s local panel. The drive also might
not start.
This is an indication, that by the drive setup,
there has been a communication loss to the
Metasys system. This is either caused by the
fact that the Metasys system is down or the
communication connection is bad.