Tpe Link Alarms; Tpe Interface Alarms - ABB ETL600 Instruction Manual

ABB Switzerland Ltd
HMI600 Alarm Text
• G4AI hardware
alarm
9.6.3.2.

TPE link alarms

HMI600 Alarm Text
• Low Rx guard level
• High Rx guard level
• Low SNR
• Neither trip nor
guard received
• Both trip and guard
received
• Loop test failed
more than twice
9.6.3.3.

TPE interface alarms

HMI600 Alarm Text
• Outputs set to
predefined state
9-26
1KHW001489-EN
Explanation and corrective actions
(the latter in italics)
An alarm is present on one of the G4AI boards
Check G4AI status for detailed information.
Explanation and corrective actions
(the latter in italics)
The level of the TPE guard signal is out the range set by
HMI600 (e.g. Configuration / NSD600 / Alarm TPE1 /
Guard level alarm ), i.e. the AGC couldn't restore the Rx
signal level to the correct range.
Make sure that
- the system level of the guard signal of the remote
equipment is equal to the one in the local equipment,
- the AGC gain [dB] is equal to the system level of the
guard signal [dBm0] minus the received guard level
[dBm].
- the AGC blocking level (Configuration / System / Alarm
settings) is some dB higher than the actual AGC gain.
SNR not sufficient, i.e. the SNR is lower than the SNR
required for Pmc = 1% plus 3 dB.
Check line conditions or coupling devices.
Either the trip or the guard signal have been suppressed
on their way over the communication channel.
Check line conditions or coupling devices.
Probably discrete frequency injected at remote end.
Look for possible sources of injected signals at the
frequencies of the guard signal or the trip signals. Remove
the disturbing signals.
The loop test failed at least three times.
Check remote equipment for correct operation. Check line
conditions or coupling devices.
Explanation and corrective actions
(the latter in italics)
TPE outputs have been set to the predefined state as
specified by HMI600 (e.g. Configuration / NSD600 /
TPE1 / Rx Output Duration [ms] )
November 2005
ETL600
Troubleshooting