| GENERAL NOTES |
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| OPERATION
OF THE RAMP SIGNALS |
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| GENERAL
DESCRIPTION |
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| The
controller operates in Flexilink isolated mode. |
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| The
controller uses Z+ Flexilink to activate system operation. |
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| When
Z+ (Flexilink) is set the controller will operate as described below in
Detector Operation. |
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| When
system is not active (ie. no Z+ (Flexi)), SG1 will remain green. |
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| When
Z+ (Flexi) is removed, close down SG2 and hold red. |
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| Z+
(Flexilink) is set using the following schedules- |
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SC1>8*09:30=1 |
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| SC2>8*15:30=0 |
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| (PD1Z+=C!) |
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| The
Link Mode must be set to Flexilink (LM=F) to provide correct operation. |
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| SIGNAL
GROUP OPERATION |
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| Signal
Group 2 |
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| SG2
is normally blank. |
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| SG2
closes down when BØ is demanded and stays red until the end of AØ minimum
green. SG2 red is blanked at the end of AØ minimum green. |
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| SG2 uses BØ yellow and
all red timesettings. |
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| (AØ
ECO is used to allow for truck travel time delay) |
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| Signal Group 3 |
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| SG3 is a dummy group for conflict purposes
only – the controller requires a non-empty conflict diagram. |
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| DETECTOR
OPERATION |
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| Detector
1 (Truck Call Function ) |
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| - Detector
1 on, |
- Place a demand for BØ. |
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| - Turn on Special Output No. 1 (Refer to “Operation of Sign A”
notes). |
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| If
detector 1 does not change from ON to OFF during AØ intergreen (ECO, yellow
and all-red) then at the end of AØ minimum green start flashing SG2 yellow. |
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| SG2
remains flashing until detector 3 is activated or detector 1 changes state
from ON to OFF. When detector 3 is activated, SG2 goes blank for the duration
of Special Purpose Timesetting No. 9, and then closes down. |
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| Detector
2 (Truck Cancel Function) |
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| BØ
automatically extends out to maximum unless the truck Cancel is activated. |
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| Truck
departing detector 2 terminates BØ. |
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| BØ
cannot terminate until the end of BØ minimum green. |
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| Detector
3 (Backup push button for Truck Call) |
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| Activation of PB3 starts Timer 1 (Special
Purpose Timesetting No. 9). |
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| Timer 1 expired, places demand for BØ. |
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| Turn on Special Output No. 1 (Refer to
“Operation of Sign A” notes). |
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| Fault
Conditions |
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| Detectors
1, 2 & 3 do not alarm in the OFF state. |
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| If
Detector 1 is ON continuously, BØ will not be demanded by Detector 1 until
Detector 1 changes state from OFF to ON. |
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| If
Detector 2 is ON continuously, BØ will run to maximum green. |
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| If
Detector 3 is ON continuously, BØ will not be recalled by Detector 3 until
Detector 3 changes state from OFF to ON. |
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| OPERATION
OF SIGN A “PREPARE TO STOP” |
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| Special Output No. 1 drives sign A “Prepare
to Stop.” |
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| Turn on Special Output 1 after the expiry
of Timer 2 (Special Purpose Timesetting No. 10) that starts at the start of
AØ ECO. |
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| Turn off Special Output 1 at the beginning
of AØ. |
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| OPERATION
OF SIGN B “SPEED LIMIT SIGN/RAMP SIGNALS ON” |
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| Special Output No. 2 drives sign B “60
km/h” & “Ramp Signals On”. |
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| When
Z+ (Flexi) is set, turn on sign B. |
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