
RTCC LED lighting controllers - User Manual
9.7
Resync mode
A sensor on IP1 detects the presence of a product . After a delay, OP1
triggers a camera. Image processing software processes the image (which
can take a variable length of time) and then sends a pass/fail message to
the RTCC. The pass/fail is re-synchronised to the original product
presence and the reject gate is opened if necessary.
The reject gate is on OP2 and pulses high to reject the product. Products
take 10 seconds to travel from the sensor to the reject gate, and take 1
second to move past the reject gate. The configuration details for this are
shown below:
Output
Mode
Input
Gate
input
Pulse
delay
Pulse
width
Retrigger
time
Flags
1
2
1
0
200ms
100μs
0
2
2
1
0
10s
1s
0
E, R, P,
(104)
10 seconds after a trigger, OP2 is set to pulse for 1 second to reject a
product.
The camera trigger has the 'Send trigger message' flag set. So that when
the product is detected, a message is send to the image processing
software. The image processing software must use the
GT
command to
receive these messages.
The image procesing software has to send a pass/fail message before the
reject gate is reached by the product. As well as 'Resync mode', the
'default to pulse' flag is set. This means that if the image processing
software does not send a pass/fail message, OP2 is pulsed anyway. The
timing diagram for this is shown below:
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