GENERAL NOTES
SUMMARY OF XSF FLAGS
XSF1 - When set allows the auto introduction of P1 in AØ.
XSF2 - When set allows the auto introduction of P2 in AØ.
XSF6 - Place a permanent demand for CØ and remove the ‘Recall’ for AØ
XSF7 - When set, CØ late start, CØ minimum green and CØ yellow periods are expired if there are other phase demands set prior to the start of or during CØ.
SUMMARY OF MSS FLAGS
MSS6 - Set when XSF6 is set.
MSS7 - Set when XSF7 is set.
MSS8 - Set when both XSF6 and XSF7 are set.
GENERAL OPERATION
Clear phase demands during associated green and yellow times.
PEDESTRIAN GROUP OPERATION
Pedestrian 1
P1 demands AØ.
P1 can introduce at the start of AØ.
P1 auto introduces at the start of AØ when XSF1 is set (all modes).
P1 calls away to BØ when controller is at rest in AØ.
Pedestrian 2
P2 demands AØ.
P2 can introduce at the start of AØ.
P2 auto introduces at the start of AØ when XSF2 is set (all modes).
P2 calls away to BØ when controller is at rest in AØ.
Pedestrian 3
P3 demands BØ.
P3 can introduce at the start of BØ.
Pedestrian 4
P4 demands BØ.
P4 can introduce at the start of BØ.
PHASE OPERATION
Dwell on Red phase 
CØ is a Dwell on Red phase that operates overnight from 23:00 to 5:00 Monday to Sunday.
During the above periods, CØ will be the pivot phase :-
-        has a permanent demand;
-        rest in CØ if no other phase demand;
-        The ‘Recall’ for AØ is removed;
-        goes to AØ or BØ if they are demanded;
-        CØ phase runs for the late start, minimum green and yellow periods.
Outside the above periods (i.e. 05:00 -> 23:00 Monday -> Sunday), AØ will be the pivot phase and CØ will be inhibited except when XSF6 is set.
XSF6 can be used to extend CØ Dwell on Red for periods outside 23:00 to 5:00 Monday to Sunday.
When XSF6 is set:
·         During this period, the signals rest in CØ, which has a permanent demand and only transitions to AØ or BØ if they are demanded
·         CØ phase runs for the late start, minimum green and yellow periods
·         The ‘Recall’ for AØ is removed and MSS6 flag is set
·         XSF6 flag also selects the alternate phase sequence in Flexilink
When XSF7 is set, CØ phase late start, CØ minimum green and CØ yellow periods are expired if there are phase demands set prior to the start of or during CØ, except for the following transitions: 
·         When XSF7 is set, the MSS7 flag is set.
·         When both XSF6 & XSF7 are set, the MSS8 flag is set.
OPERATION OF INTERNALLY ILLUMINATED SIGNS
·         Wait State 8 (WS8) or Special Output 1 (SO1) drive a LED ‘Give Way To Pedestrians’ sign during P1 Walk and Clearance.
·         Wait State 7 (WS7) or Special Output 2 (SO2) drive a LED ‘Give Way To Pedestrians’ sign during P2 Walk and Clearance.
·         Wait State 6 (WS6) or Special Output 3 (SO3) drive a LED ‘Give Way To Pedestrians’ sign during P3 Walk and Clearance.
·         Wait State 5 (WS5) or Special Output 4 (SO4) drive a LED ‘Give Way To Pedestrians’ sign during P4 Walk and Clearance.