GENERAL NOTES
SUMMARY OF XSF FLAGS
(Communications Operation of XSF flags is required)
XSF2 - Controls Main Warning Signs and Internally Illuminated Pavement Lights (on-line)
XSF3 - Control of Boom Barriers (on-line)
GENERAL OPERATION
If Local Control (Detector 1) is ON or Emergency Stop/Booms Reset then Auto Control (i.e. remote operation) is disabled.
XSF Flags
When XSF2 is first sent, Pedestrian Wait State 1 is activated to switch the Main warning signs. If Detector 3 (Main Warning Lights ON input) is not switched ON within 5 secs (Special Purpose Timesetting no. 9) of XSF2 being sent then set MSS Flag 9 to send a warning message to the TMC. When XSF2 is sent start Timer 2 (Special Purpose Timesetting no. 10, which is initially set to 0 seconds). The Booms cannot be lowered until Timer 2 has expired. If both XSF2 and XSF3 are cleared and Detector 3 is still ON after 5 secs (Timesetting no. 9) then set MSS Flag 10.
When XSF3 is first sent after XSF2 flag set, Pedestrian Wait State 2 is activated to lower the Boom barriers. If Detectors 6 and 7 (Booms Horizontal) are not switched ON within 20 secs (Special Purpose Timesetting no. 11) of XSF3 being activated then set MSS Flag 11 to send warning message to the TMC. If XSF3 is cleared and Detectors 4 &/or 5 are not switched ON within 20 secs (Special Purpose Timesetting no. 11) of XSF3 being cleared then set MSS Flag 12.
Communications must be established and XSF3 removed before Booms can be raised, unless the Local Control is ON. When XSF3 is removed or the Local Control is ON then both Pedestrian Wait States 1 and 2 are switched OFF. The operation can only be re-activated if the XSF flags change state from OFF to ON.
If NO Boom inputs, Dets 4,5 (Vertical) or Dets 6,7 (Horizontal) are received within 20 secs (Special Purpose Timesetting no. 11) then set MSS Flag 15 to send message to TMC. (Possible Cable Fault)
PEDESTRIAN WAIT STATE OPERATION
Pedestrian Wait State 1 is used to switch the Main Warning Signs.
Pedestrian Wait State 2 is used to lower/raise Boom barriers.
Pedestrian Wait State 3 is used to indicate Communication status.
DETECTOR OPERATION
Detector 1 - Local Control ON
- Detector 1 activated disables Auto control (remote) of booms and sets MSS Flag1 to send a message to the TMC.
Detector 2 - Not Used
Detector 3 - Main Warning Lights 
- Detector 3 activated sets MSS Flag 3 to send a message to the TMC.
Detector 4 - Booms Vertical (Left Side)
Detector 5 - Booms Vertical (Right Side)
Detector 6 - Booms Horizontal (Left Side) 
Detector 7 - Booms Horizontal (Right Side)
Detector 8 - Main Supply Fail/UPS Online (Left)-Critical Alarm
- Detector 8 activated sets MSS Flag 8 to send a message to the TMC.
Detector 9 - Main Supply Fail/UPS Online (Right)-Critical Alarm
- Detector 9 activated sets MSS Flag 8 to send a message to the TMC.
Detector 10 - Auto Control (Remote) ENABLED
- Detector 10 activated sets MSS Flag 6 to send a message to the TMC.
Detector 11 - Emergency Stop Activated
- Detector 11 activated sets MSS Flag 14 to send a message to the TMC.
Detector 12 - Booms Reset Activated
- Detector 12 activated sets MSS Flag 14 to send a message to the TMC.
Detector 13 - DC Supply Fail (Left)
- Detector 13 activated sets MSS Flag 7 to send a message to the TMC.
Detector 14 - DC Supply Fail (Right)
- Detector 14 activated sets MSS Flag 7 to send a message to the TMC.
SCATS WARNING MESSAGES    
MSS 1 - “0 SIL %1: WGB WARNING, LOCAL CONTROL ON
MSS 3 - “0 SIL %1: WGB WARNING, WARNING SIGNS ON
MSS 5 - “0 SIL %1: WGB WARNING, DET 1 ON, CLEAR THE FUNCTIONS OF XSF2, XSF3
MSS 7 - “0 SIL %1: WGB WARNING, DC SUPPLY FAIL – CHECK DETS 13, 14
MSS 8  - “0 SIL %1: WGB WARNING, MAIN SUPPLY FAIL/UPS ONLINE – CRITICAL ALARM - CHECK DETS 8, 9
MSS 9
  OR              - “0 SIL %1: WGB WARNING, WARNING SIGNS SWITCHED ON/OFF-CHECK DET 3
MSS 10  
MSS 11
  OR
MSS 12 - “0 SIL %1: WGB WARNING, BOOMS POSITION INCORRECT-CHECK DETS 4, 5, 6, 7
  OR
MSS 13
MSS 14 - “0 SIL %1: WGB WARNING, EMERGENCY STOP / BOOMS RESET ACTIVATED-CHECK DETS 11, 12
MSS 15 - “0 SIL %1: WGB WARNING, WARNING, BOOMS NOT UP OR DOWN (CABLE FAULT??)
INPUT CABLE TERMINATION CHART
(10 pairs Communications Cable A)
DESCRIPTOR CIRCUIT PAIR CONDUCTOR TERMINATION DETAILS
or FUNCTION           STATUS   REF No. INSULATION COLOUR                                             
LOCAL CONTROL N/OPEN 1st WHITE --------- DET. RETURN
     ENABLE BLUE ----------- DETECTOR NUMBER:   1
NOT USED N/OPEN 2nd WHITE --------- DET. RETURN
ORANGE ------ DETECTOR NUMBER:   2
MAIN WARNING N/OPEN 3rd WHITE --------- DET. RETURN
         SIGNS GREEN --------- DETECTOR NUMBER:   3
BOOMS FULLY  N/OPEN 4th WHITE --------- DET. RETURN
UP (LEFT SIDE) BROWN -------- DETECTOR NUMBER:   4
BOOMS FULLY N/OPEN 5th WHITE --------- DET. RETURN
UP (RIGHT SIDE) GREY ----------- DETECTOR NUMBER:   5
BOOMS HORIZONTAL N/OPEN 6th RED ------------- DET. RETURN
      (LEFT SIDE) BLUE ----------- DETECTOR NUMBER    6
BOOMS HORIZONTAL N/OPEN 7th  RED ------------- DET. RETURN
     (RIGHT SIDE) ORANGE ------ DETECTOR NUMBER    7
MAINS POWER N/OPEN 8th  RED ------------- DET. RETURN
FAILURE (LEFT) GREEN    ------ DETECTOR NUMBER    8
MAINS POWER N/OPEN 9th  RED ------------- DET. RETURN
FAILURE (RIGHT) BROWN    ------ DETECTOR NUMBER    9
AUTO CONTROL N/OPEN 10th  RED ------------- DET. RETURN
(REMOTE) ENABLED GREY    ------ DETECTOR NUMBER    10
INPUT / OUTPUT CABLE TERMINATION CHART
(10 pairs Communications Cable B)
DESCRIPTOR CIRCUIT PAIR CONDUCTOR TERMINATION DETAILS
or FUNCTION           STATUS   REF No. INSULATION COLOUR                                             
WARNING SIGNS N/OPEN 1st WHITE ---------
      BLUE ----------- 1
LOWER BOOMS N/OPEN 2nd WHITE ---------
          ORANGE ------ 2
COMMUNICATIONS N/OPEN 3rd WHITE ---------
         STATUS GREEN ---------    3
DC SUPPLY FAIL N/OPEN 4th  WHITE ------------- DET. RETURN
         LEFT BROWN    ------ DETECTOR NUMBER    13
DC SUPPLY FAIL N/OPEN 5th  WHITE ------------- DET. RETURN
        RIGHT GREY    ------ DETECTOR NUMBER    14
EMERGENCY STOP N/OPEN 6th  RED ------------- DET. RETURN
ACTIVATED BLUE    ------ DETECTOR NUMBER    11
BOOMS RESET N/OPEN 7th  RED ------------- DET. RETURN
ACTIVATED ORANGE ------ DETECTOR NUMBER    12