HE4000 Encoding System
Troubleshooting
6.7 Viewing the Fault History Log Using a Remote Unit
To view the fault history log with a remote unit, issue the
FM LOG_LIST
command. The unit
responds with either
No Faults
if none are present, or one or more fault messages.
The remote unit displays the fault history log beginning with the time and day tag followed by the
fault descriptor.
For example, assume that the current day is Dec 30, 2003, at 6:56 pm. The status LED is
illuminated. The fault history log is queried. The
FM History
command is issued. The remote
terminal displays the following information:
fm history
Fault History
-------------------------------------------------
Dec 30, 2003 06:56:56 Power-on or reboot occurred
Dec 30, 2003 06:57:51 Audio A loss of input
Dec 30, 2003 06:57:51 Audio B loss of input
Dec 30, 2003 06:57:51 Audio C loss of input
Dec 30, 2003 06:57:51 Audio D loss of input
Dec 30, 2003 07:03:49 SD video loss of input
The query response shows:
•
The type of information queried:
fault log
•
The time the query was issued: 06:56:56
•
The day of the year the query was issued: Dec 30, 2003
•
A listing of all faults in the fault history log
6.8 Fault Relay Monitoring
The Form-C fault relay is a real-time indicator for specific fault conditions. The relay contacts are
passive.
A Form-C relay has a common contact (C) and two other contacts (A and B). Normally the
common contact is connected to A and not to B.
When the relay is indicating a fault condition, the common contact C is connected to B and not to
A. this relay indicated a fault condition when power has failed. A power failure, power switch
turned off, or an unplugged unit is defined as a fault condition.
When the fault relay detects a fault condition, the fault relay trips and the Status LED illuminates
red.
Once a fault condition sets the fault relay and illuminate the status LED on the front panel, they
must be cleared manually by either:
•
Selecting the front panel Status>Relay>Clear option.
•
Issuing a remote
FM RELAY_CLR
command.
01-0951-404 Rev B
6-5
