S7 output card with SF light on...

[haygood2]

We have the S7-300 with a particular output module (6ES7322-1FH00-0AA0) that always has the SF light on.
When I pull up thr hardware diagnostics...it shows nothing wrong.
Any ideas??

 

[jacekd]

Go to HWConfig and connect online to your PLC. Then open module diagnostic for the module.

Regards,

Jacek

Do it right or don't do it at all.

 

[Mike6158]

Aarrgh.... I know what the problem is and I can't remember what I found. I had exactly the same problem about 6 months ago. Nothing showed up in diagnostics and the card worked fine but it alsways had an SF light. It worked during checkout but on a subsequent unrelated return trip I found the SF lamp on.

It's something simple like not having power to both sections of the card. If I remember correctly the card that you have listed is a 16pt DO 120/220 VAC and there should be power fed to the top and bottom group of IO (8 to a group). We usually just power the top group and jumper that down to the second group.

Look at how the card is wired and make sure that you are powering the proper locations. In my case, the bottom section of the card was not being used so nothing in the process was affected. If I had been using it, any output that I wanted to be on would not have worked. It was wired correctly. For some reason someone had (a) fused each card section (on just that card) separately and (b) pulled the fuse on the bottom half. Since we were running I just put the fuse back in and didn't re-wire the card.

Let us know if what you find.

PS-

I just looked up the wiring diagram for a 1HH card. Couldn't find the 1FH card listed so my hardware manual is old. 1HH is a 16pt 120 VAC output card and it's probably wired the same but I strongly recommend that you verify this before going any further.

You should have power to:

1L - Pin 1
1N - Pin 10

and

2L - Pin 11
2N - Pin 20

L = Load
N = Neutral

Whew.. big post. I hope after all this that this is your problem

 

[pjcha]

Verify the power supplie of the signal module, becouse that kind of card only show SF if don't have power itself or if you define other card on HW configuration.


Best Regards

Paulo Afonso