| GENERAL NOTES | |||||||||||||||||||||||||||||||
| FIRE STATION OPERATION | |||||||||||||||||||||||||||||||
| GENERAL | |||||||||||||||||||||||||||||||
| The signals which control vehicular traffic are standard 3-aspect (R/Y/G) displays and are provided to facilitate unopposed egress of an emergency vehicle from its base station onto the roadway. | |||||||||||||||||||||||||||||||
| The signal displays for SG1 and SG2 remain green and only change to yellow and to red when there is a demand for BØ. | |||||||||||||||||||||||||||||||
| CALL FUNCTIONS (Detector 1) | |||||||||||||||||||||||||||||||
| Call Push Buttons 1 & 2 | |||||||||||||||||||||||||||||||
| The activation of PB1 or PB2 starts a delay timer (Special Purpose Timesetting No. 9). The expiry of this delay timer places a demand for BØ and Ped1. BØ is automatically extended to maximum, unless the extension is terminated by the CANCEL FUNCTION. | |||||||||||||||||||||||||||||||
| CANCEL FUNCTION (Detector 2) | |||||||||||||||||||||||||||||||
| The activation of PB3 starts a delay timer (Special Purpose Timesetting No. 10). The expiry of this delay timer terminates BØ extension. BØ will be terminated after minimum green if the timer expires during BØ minimum green. | |||||||||||||||||||||||||||||||
| CALL RECORD FUNCTION | |||||||||||||||||||||||||||||||
| The Ped 1 demand is placed by the CALL to enable the call record facility in the controller to be used to drive a display in the station. The Ped demand is cleared at the start of BØ. The access code (PSC2002: A.E03BD, Alpha16: A.3BD, Delta3: A.3BD) displays the CALL RECORD logic output on the Keyboard Display Unit. | |||||||||||||||||||||||||||||||
| START UP | |||||||||||||||||||||||||||||||
| There is no ALL RED START UP interval. The controller will resume normal operation in AØ rest. Demands for BØ placed prior to the resumption of normal operation are cleared. | |||||||||||||||||||||||||||||||
| ABNORMAL CONDITIONS | |||||||||||||||||||||||||||||||
| If detector 1 is ON continuously, BØ will not be called until it changes from OFF to ON. | |||||||||||||||||||||||||||||||
| If detector 2 is ON continuously, the CANCEL FUNCTION will operate NORMALLY, i.e., BØ will run the minimum green only. | |||||||||||||||||||||||||||||||
| Note: the failure of detector 1 and / or detector 2 in the ON state will flag a detector alarm for monitoring purposes. | |||||||||||||||||||||||||||||||