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Proteco Q80 photocells failing - Printable Version

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Proteco Q80 photocells failing - dstechnik - 12-03-2018

I have problem with gate by proteco:


My customer have Q80S –
 
And we need to solve this issue:
 
Step 1 : open gate
Step 2 : car go trough the 
Step 3: gate close almost immidietly after car – this is OK
 
Step 1: open gate
Step 2: after timer end gate automaticly close – this is OK.
 
Step 1: open gate
Step 2: car stops between photocells -> gate stop -> this is OK! -> first car leave photocells -> and there is second car go just behind first car stops between photocells gate stops for just a few second and then continue in closing even while car is between photocells.
 
What can be wrong?
 
This gate has 2 pairs of photocels for closing (correctly wired) and 0 pair for opening.
 
Photocels test is disabled.
 
Do you have any idea where is the problem. We changed Q80 for Q60 and it works. But we don´t know where is the problem.

Thank you for any resposes.