GENERAL NOTES
SUMMARY OF XSF FLAGS
XSF4 - Selects Special Maximum for SG4 in CØ (Special Purpose Timesetting no. 9) (All modes).
XSF5 - Selects Special Maximum for SG5 in CØ (Special Purpose Timesetting no. 10) (All modes).
SIGNAL GROUP OPERATION
Signal Group 4
1. SG4 is controlled by Special Movement Timesetting no. 1 in CØ.
    CØ Special All Red timesetting is substituted for Special Movement Timesetting no. 1.
2. XSF4 is used to set the maximum extension green time for SG4 in CØ.
    This time is stored in Special Purpose Timesetting no. 9.
    SG4 is forced off after this maximum extension green time.
3.  Late start SG4 in CØ if going AØ®CØ using a special timer (AØ special all red) that starts at the end of SG2 yellow.
4.  Late start SG4 in CØ if going BØ®CØ using a special timer (BØ special all red) that starts at the end of SG3 yellow.
Signal Group 5
1. SG5 is controlled by Special Movement Timesetting no. 2 in CØ.
    CØ All Red timesetting is substituted for Special Movement Timesetting no. 2.
2. XSF5 is used to set the maximum extension green time for SG5 in CØ.
    This time is stored in Special Purpose Timesetting no. 10.
    SG5 is forced off after this maximum extension green time.
3. SG5 operates green-yellow-red in CØ.
4. SG5 goes red with SG2 in AØ, and remains red through BØ and C2Ø.
5. SG5 closes down at the end of C1Ø or C3Ø green, remains red through AØ late start, then goes 
    ‘blank’ at the start of AØ minimum green.
When P1 is demanded.
6. If going BØ®AØ, C2Ø®AØ, with a demand for P1, hold SG5 red for the duration of Timer 1 
    (Special Purpose Timesetting no. 11).  Timer 1 starts timing at the start of P1 walk.
    When Timer 1 expires, SG5 red is switched off.
7. If going C1Ø®AØ or C3Ø®AØ, with a demand for P1, SG5 goes red at the start of C1Ø or C3Ø all 
    red period, and is held red for the duration of Timer 1 (Special Purpose Timesetting no. 11).
    Timer 1 starts timing at the start of P1 Walk.  When Timer 1 expires, SG5 red is switched off. 
8. AØ ECO is used to guarantee SG5 minimum blank period. Timer 2 (Special Purpose Timesetting no.
    12) starts timing at the start of SG5 blank period.  When Timer 2 expires, expire AØ ECO.
Signal Group 6
1.  Late start SG6 in BØ.
PEDESTRIAN GROUP OPERATION
Pedestrian 1
P1 calls AØ.
P1 calls BØ if the controller is resting in AØ.
P1 can introduce at anytime in C2Ø and during AØ late start and can overlap C2Ø®AØ.
Pedestrian 2
P2 calls BØ.
P2 can introduce at the start of BØ.
PHASE
C Phase
1. Expire CØ late start when SG4 is not demanded.
DETECTOR OPERATION
General
Clear vehicle demands during associated phase green and yellow.
Detector 3
Clear demands for CØ from detector 3 during SG4 green and yellow.
Detector 3 calls C1Ø if going AØ®CØ.
Detector 5
Detector 5 places a non-locking call for CØ when its presence time expires.
Detector 6
Clear demands for CØ from detector 6 during SG3 and SG5 green and yellow.