UTC System Handbook - Siemens

System Handbook for an STC UTC System 666/HE/16940/000
An additional "LF3" lamp failure reply bit is available as a configurable
item. See section 2.3. "LF3" is associated with the unidentified lamp fault.
(15) Group 1 Indication - GP1
The "GP1" reply bit is output by some types of controller at the start of its
group 1. This is then checked during controller checks, section 7.14, to
ensure that all such controllers are synchronised, see also section 7.1.2(9).
(16) Remote Reconnect - RR
When the System sees an "RR" reply bit it isolates the controller and reports
a fault. Normally when the RR bit is set the UTC System will not monitor
the controller for faults. However, the System may be configured (S) to
generate the appropriate fault messages when the MC, EV or HC bits are
set.
When the bit clears all faults associated with the controller and its OTU are
cleared, the clearance is reported and the controller's isolation cancelled.
Maintenance personnel normally use this facility after having fixed a fault.
In the UK a controller can be configured so that the bit is set when the mode
switch in the controller is moved away from its normal position.
(17) Manual Control - MC
The presence of the "MC" reply bit in a controller's reply word indicates to
the System that the controller has been taken out of the normal UTC mode
and is in the Manual Control mode. Its action is similar to the remote
reconnect facility, section 7.1.3(16), except that its disappearance does not
clear the faults for equipment on the OTU. It is normally used to indicate
that the police have taken manual control of the junction.
(18) Pedestrian Inhibit- PI
The presence of the "PI" reply bit in a controller's reply word for 3 or more
consecutive seconds raises a non-isolating fault and outputs a message to
the System log. When the bit disappears for 3 seconds or more the fault is
automatically cleared and a message output to the log. Plan compliance
continues whilst this fault is active and if the pedestrian stage was
demanded by the computer then the junction has a plan compliance fault
raised.
(19) Test Facility- TF
The presence of the "TF" reply bit in a controller's reply word indicates to
the System that the controller has been taken out of the normal UTC mode
and is in the Test Facility mode. Its action is similar to the remote reconnect
facility, section 7.1.3(16), except that its existence for 3 or more seconds
raises a non-isolating alarm and outputs a message to the System log, and its
disappearance outputs a message informing the end of the test facility. It is
normally used to indicate that the junction is being tested.
(20) Solar Bright confirm - SB
NOTE: This and the Dimming Confirm bits are mutually exclusive - only
one is available on a system at a time, being defined in the System
configuration.
666-HE-16940-000.doc Issue 31 Page 38