Plc Interface Alarms - ABB ETL600 Instruction Manual

ETL600
HMI600 Alarm Text
• Low Rx pilot level in
channel 1
• Low Rx pilot level in
channel 2
• Low Rx pilot level in
channel 3
• AGC blocked in
channel 1
• AGC blocked in
channel 2
• AGC blocked in
channel 3
• Automatic frequency
control failed
9.6.1.3.

PLC interface alarms

HMI600 Alarm Text
• Date mismatch
between int. and
ext. clock
• No ext. real time
clock sync. signal
detected
Troubleshooting
1KHW001489-EN
Explanation and corrective actions
(the latter in italics)
The Rx pilot level on channel 1/2/3 is below the alarm
threshold.
Make sure that the channel settings of both link terminals
match. Check the received pilot level (Equipment / Upload
status). Correct
(Configuration / System / Alarm settings / Pilot level
APLC channel 1/2/3)
Automatic Gain Control of channel 1/2/3 can't restore the Rx
signal to the correct level The reason might be missing pilot
signal.
Make sure that
- no test mode is active,
- all internal and external TPE are in guard state,
the channel settings of both link terminals match,
the pilot signal is present (Equipment / Upload status).
Automatic Frequency Control can't synchronize the carrier
frequency of the receiver. The reason might be insufficient
quality of the pilot signal in channel 1.
Make sure that
- no test mode is active,
- all internal and external TPE are in guard state,
the channel settings of both link terminals match,
- the channel 1 pilot signal is present (Equipment / Upload
status).
Explanation and corrective actions
(the latter in italics)
The date information from the on-board RTC and the
external IRIG source are contradictory.
Set the time of the on-board RTC to the correct data by
means of HMI600
The signal for the external IRIG source can not be
detected anymore.
Check the IRIG source and the cable connection
November 2005
ABB Switzerland Ltd
the pilot level alarm threshold
9-19