Hi at all,

I read in safety manual for ET200sp:

Disable dark test for 48 hours
This option allows you to suppress the dark test.
If the channel is permanently active (1) for 48 hours, a single dark test pulse is directed to
this channel once the time has expired.
You must provide the signal change from 1 to 0 at the channel yourself within 48 hours to
prevent the dark test pulse. This also applies to the operating time if the operating time is <
48 hours. The dark test is suspended for another 48 hours after the signal change from 0 to
1.
The dark test is permanently suppressed if the following condition is met:
● A signal change from 1 to 0 takes place before the 48 hours have expired.

But in Module parameters of FDO, FDI, PMF I don't read dark test can be suppressed but only choose from 1000s or 100s.

Any of you know how is possible to disable dark test and you 24hr option?

Thank you in advance!!!

Nobody can help me???

Thank you!!!

Hello dstudio;

There is information in certain recent threads on the forum that could help you out:

F-DQ module - disable dark test

What effect do the test pulses of fail-safe ET 200S modules have?

Have you taken the habit of searching for your different themes on the forum before asking a new question?

Hope this helps,

Daniel Chartier

Thank you!!!

so nothing to do...

Hello dstudio;

Not unless you use a relay...

See the complete answer from Siemens Support, from the link you opened.

If you needmore detail, I suggest you refer to them directly, through a Support Request ««««9use the lkink at the top of this page).

Hope this helps,

Daniel Chartier