Specifications

3U Traffic Outstation Handbook
667/HB/26568/000 Page 173 Issue 15
The Site Power Fail fault and clearance will be reported with the same priority as
configured for the OMU Power Failure report, i.e. “Urgent” or “Non-Urgent”.
11.6.14 Controller Stuck Fault (FLT STK)
If, during Fixed Time or CLF operation, the OMCU detects that the controller is not
changing stage for more than the configured period, the following fault data will be
presented:
FORMAT:
FLT:!STK
11.6.15 Vehicle Absence Failure (FLT VAF)
The OMCU continually monitors detector inputs and if it senses that a particular input
has not changed to the active condition for the configured time the following data will
be presented:
FORMAT:
FLT:!VAF n
‘n’ represents the number of the input that has failed in the range 0 to 63. See
section 5.6.5, which starts on page 65, for locations of the OMCU inputs on the I/O
Boards fitted. To determine the controller connections refer to the OMCU
configuration data sheet for the particular I/O board.
11.6.16 Vehicle Presence Failure (FLT VPF)
The OMCU continually monitors detector inputs and if it senses that a particular input
has not changed to the in-active condition for the configured time the following data
will be presented:
FORMAT:
FLT:!VPF n
See FLT VAF above for further details on the input number ‘n’.