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PUFFIN |
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PAGE 3/1 |
| SITE NAME |
COOPER STREET NR
DAVISSON STREET |
SITE NO. |
7034 |
| PEDESTRIAN
OPERATION |
| VARIABLE WALK AND
CLEARANCE OPERATION |
| (PUFFIN) |
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| 1.
DETECTION INFORMATION |
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The controller is
capable of supporting 1 PUSH BUTTON detector input and 2 CLEARANCE ZONE
detector |
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inputs. |
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Note: There are no WAIT
ZONE detectors at this site. |
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| 2.
NOTES ON OPERATION |
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| A.
PEDESTRIAN DEMAND |
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A demand for the
pedestrian is placed by an activation of the PUSH BUTTON detector input. |
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ABNORMAL OPERATION |
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If
the push button is continuously stuck on, then a permanent demand for the
pedestrian will be placed. When the |
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controller is on line to
SCATS and the push button is continuously ON for the periods as specified by
the SCATS |
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TDA message, then a
Detector Alarm (DA) will be generated on the push button. |
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If the push button is
continuously OFF, then a pedestrian demand is not placed. |
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| B.
WALK EXTENSION FUNCTION USING CLEARANCE ZONE DETECTORS |
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GENERAL |
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The walk display runs
for a minimum time. This minimum is specified in Special Purpose Timesetting
No. 14. |
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Activation of the CLEARANCE ZONE detectors (i.e. detectors 6 and/or 7) provides
extension of the walk |
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display up to a maximum time. This maximum time is specified in the Walk Time of
Pedestrian No. 1. |
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Between the minimum and
maximum times as specified above, the walk display is terminated if the
CLEARANCE |
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ZONE detectors have been
vacated for the period as specified in Special Purpose Timesetting No. 12. |
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(Note: Generally set to 1
s). |
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ABNORMAL OPERATION |
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If the CLEARANCE ZONE detectors (i.e. 6 and/or 7) do not toggle ON
during the Walk interval up to the |
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"STANDARD"
walk, then terminate at this instant. The "STANDARD" walk is
specified as the total of Special |
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Purpose Timesetting No.
14 plus Special Purpose Timesetting No. 15. |
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Note: When the
controller is online to SCATS and a CLEARANCE ZONE
detector does not toggle ON for |
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the
period as specified by the SCATS TDA message, then a Detector Alarm (DA) will
be generated on that |
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CLEARANCE ZONE detector |
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If a CLEARANCE ZONE
detector does not toggle OFF during the Walk, then extend to maximum (i.e.
Walk |
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Time of Pedestrian No.
1). This may be due to a faulty detector, or a large number of pedestrians. |
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Note: When the
controller is on line to SCATS and a CLEARANCE ZONE
detector does not toggle OFF |
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for the period as
specified by the SCATS TDA message, then a Detector Alarm (DA) will be
generated on that |
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CLEARANCE ZONE detector.
If this occurs then the Walk will terminate at the "STANDARD" walk
time |
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(i.e. the total of
Special Purpose Timesetting No. 14 plus Special Purpose Timesetting No. 15). |
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| DESIGNED BY: |
DARREN VAUGHAN |
DATE |
17/04/08 |
| G:\TMC
Opsheets\Pending\[7034.htm]PUFFIN Notes 1 |
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