Hi,

even LOGO! 6 the OHC has not counted seconds. If the signal is "1" for > 40 secons, then the OHC counts 1 minute.

So if you have a pls sequence of 40 sec "1" and x seconds "0" any time the OHC counts 1 minute.

So you have a delay of  up to ~20 sec per minute.

Never the less I prefere the LOGO! 8 countig and it is an operatin HOUR counter, not an Operating second counter. ;-)))))))

So, I also once conducted tests with 0BA8.

1.) In the simulation, with exactly 60s.
Operating hours counter counts to one minute.

2.) In the real logo with exactly 60s.
Operating hours counter does not count on.

3.) In the real Logo 60s and a 1 / 100th, so 60: 01s.
Operating hours counter counts to one Minute.