Functional description
3.10 Diagnosis
For monitoring and evaluation of the system functions different diagnosis information are available.
These are e.g. the signalling of errors on watchdog LEDs or relay contacts or the provision of error
information on the protocol interface by me
ans of the data object “error”.
3.10.1 Watchdog-
LED „Self-monitoring“ and fault annunciating relays
The watchdog-
LED „self-monitoring“ gives information about the current status of the annunciator
device or system:
Steady light green
- No error
Flashing green
- Initialisation or alternative
Flashing red
- Error (see section
”)
Off
- No power supply
With the USM, an error code can be derived from the blink sequence and the associated error can be
inferred. A flashing sequence consists of:
Number of long flashing pulses
1st digit of the error code
Number of short flashing pulses
2nd digit of the error code
Pause
Example: long, short, short, pause = error code 12
3.10.2 Error codes
The error codes listed in the following table correspond to the red flashing sequence of the "Operating
mode" control LED of the USM.
Example:
Error 68
- Connection to NTP Server disturbed
Flashing sequence of OK-LED
- long, long, long, long, long, long
- short, short, short, short, short, short, short, short,
pause
In the following table, the error codes of the USM are enlisted.
Error code
Error
Note
1
Collective error
This error is additionally triggered if any error occurs in the fault
annunciator.
11
Internal error
If the error still is at issue after restart of the device, the device
needs to be returned to EES for inspection.
12
Internal error
13
Overflow alarm buffer
After a surge of alarms, interstages of alarms can be lost. The
final stages of the alarms are valid.
14
Relay cards
If the error still is at issue after restart of the device, the device
needs to be returned to EES for inspection.
15
Communication within
cascaded annunciator
system disturbed
This error can occur in cascaded systems. It will be issued when
the connection between the USM and at least one of the slaves
(BSM) is disrupted. Please verify the configuration of the slave
addresses and the connection cables.
If multiple errors are at issue, the LED displays the error with the highest priority.