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Goal: provide information about how the Anti-Collision system works and the steps to troubleshoot this system given a particular configuration.
Anti-Collision is a system implemented to prevent vehicles from colliding in the tunnel.
Anti-Collision will be triggered under differing conditions depending on the configuration of the system at the site.
There are two common configurations which we use:
Configuration 1: Single-Input Exit Plate
This configuration utilizes a single magnetic plate (EMX plate imaged below) at the exit of the tunnel which detects when a vehicle is above the plate. The plate is wired to an amplifier which controls the sensitivity of the magnetic field and controls the signal voltage to the TCS input. This device will be programmed as a PROGRESS SWITCH with a Detection Mode of “Tunnel Exit”. The appropriate input, plate location relative to the enter switch, and Safety Distance will be set under this progress switch.
When operating normally, the TCS will display a “Progress Switch Error” if the magnetic plate is triggered and a vehicle is approaching in TunnelWatch. The approximate vehicle location can be seen in the PRODUCTION section of TunnelWatch. As this sensor type relies on TunnelWatch’s assumed position of the vehicle, an accurate pulse measurement is crucial to this Anti-Collision configuration.
Configuration 2: Dual-Input Magnetic Plate/Photoeye Sensor
This configuration utilizes two separate detectors, either magnetic plates or photoeye sensors, and will trigger a “Progress Switch Error” if both sensors are activated simultaneously.
Similar to the magnetic plates, the Photoeyes use an amplifier as well to power the sensors and control the signal to the TCS input. These will also be programmed as a PROGRESS SWITCH in TunnelWatch. However, in this configuration the Detection Mode will be “Collision Detection” and we will only record the location of the first switch. Since this configuration uses two separate sensors, it is much less prone to issues resulting from an inaccurate pulse.
SCENARIO 1: TUNNEL STOPPING UNEXPECETEDLY - PROGRESS SWITCH ERROR
SCENARIO 1: TUNNEL STOPPING UNEXPECETEDLY - PROGRESS SWITCH ERROR
Single Input Configuration
Ensure guests are not driving over the plate prematurely
Check the amplifier for “Ghost Detections”
a. Go to the EMX amplifier
b. Inspect the “Detect” light. This should only be illuminated if a vehicle or other piece of metal is over the EMX plate
i. If there is a ghost detection;
Reset the amplifier
Check wiring and amplifier for loose connections or damage
Check the TCS input
a. Make sure the plate is not active
b. Find the TCS input card
i. If the input for the anti-collision is illuminated when it should not be
Please contact a facilities member for advanced troubleshooting
Check conveyor speed and pulse length
a. Mark measurements along conveyor for 15 ft
b. Send a roller
c. Record time to travel 15 ft
d. Divide 15ft by seconds
e. Compare to TCS display
Dual Input Configuration
Check the amplifier for “Ghost Detections”
a. Inspect the “Output” light. This should only be illuminated if an object is obstructing the eyes.
i. If there is a ghost detection;
Ensure no objects are obstructing the eyes. Such as, hoses or wires.
Clean the photoeyes with a towel
Reset the amplifier
SCENARIO 2: TUNNEL DOESN’T STOP WHEN ANTI-COLLISION IS ACTIVE
SCENARIO 2: TUNNEL DOESN’T STOP WHEN ANTI-COLLISION IS ACTIVE
Single Input Configuration
Ensure the device is enabled in TunnelWatch
a. Log in to TunnelWatch
b. Navigate to the Setup Page
c. Select Progress Switches
i. If the anti-collision switch is not present
check the “Show Inactive Progress Switches” and verify if it is present now
d. Select the Anti Collision switch
e. Ensure it is set to active
Ensure the device is not in an override state
a. Log in to TunnelWatch
b. Navigate to the Overrides Page
c. Check for an Anti-Collision over ride
d. Ensure it is set to Auto
Check the amplifier for power
a. Find the amplifier power light
i. If the light is not on
Check for loose or damaged wiring
Check that the power switch is in the on position
Examine the amplifier for a loop failure indicator
a. On the gold D-Tek style amplifier, find the “Detect” LED
i. If brightly illuminated in a pattern, check the following items;
Wiring for damage or loose connections
Amplifier for loose connection
b. On the blue reno style amplifier, find the “LOOP FAIL” LED
i. If brightly illuminated in a pattern, check the following items;
Wiring for damage or loose connections
Amplifier for loose connection
5. Ensure the plate is detecting properly
a. Place a section of chain across the plate
b. Check the amplifier detect light
i. If the light is not illuminated
Check for loose or damaged wiring
Reset the amplifier
6. Check conveyor speed
a. Log in to TunnelWatch
b. Navigate to the “Production” screen
c. Take note of the speed, see the image below for location
d. Measure conveyor speed
i. Measure and mark 15 feet along the conveyor
ii. Send a roller and record the time to travel 15 feet
iii. Divide 15 by the time to travel 15 feet
iv. Compare to speed displayed in TunnelWatch
Dual Input Configuration
Ensure the device is enabled in TunnelWatch
a. Log in to TunnelWatch
b. Navigate to the Setup Page
c. Select Progress Switches
i. If the anti-collision switch is not present
check the “Show Inactive Progress Switches” and verify if it is present now
d. Select the Anti Collision switch
e. Ensure it is set to active
Ensure the device is not in an override state
a. Navigate to the Overrides Page
b. Check for an Anti-Collision over ride
c. Ensure it is set to Auto
Check the amplifier for power
a. Find the amplifier power light
i. If the light is not on
Check for loose or damaged wiring
Check that the power switch is in the on position\
Check the photoeyes are detecting properly
a. Clean the photoeyes with a towel
b. Place a towel over one of the photo eyes
c. Examine the amplifier “Output” LED
i. If the LED is not illuminated
Reset the amplifier
5. Check TunnelWatch is recognizing the input
a. Find the TCS
b. Identify the Input card
c. Ensure the Anti-Collision inputs are off when the outputs are inactive and on when outputs are active
i. If the input is off when the output is active
Check for loose wiring at the amplifier
Check for loose wiring at the TCS input
ii. If the input is on when the output is inactive
Please contact a facilities member for advanced troubleshooting
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