Wirebreak diagnostics

 Hi huggy,

Diag.diag82 is for another module. The example was used for two modules. In my case i just used one. That is why minimized the other. The other side break is in channel 2. Also regarding the count, i am able to get the counts for how many times OB82 is called. But the error storage is always one. I don't understand why.

Is there any difference in central IO module and decentral IO modjle diagnostics?

Thanks,

Jay

huggy_d1

What is in diag82.diag82[2]?

Was the first wire break in the 4th input?

Are you counting how many times OB82 is getting called?

 Hi huggy,

Thanks for the reponse again and I tested the RALRM function. But still I couldn't figure out what exactly i missing to achieve individual channel diagnostics. I think I am weak in handling this Diagnostic option using RALARM function. I am still able to get only one channel diagnostics. Sorry for the late reply, just now got the time to check this project again.

Thanks,

Jay

huggy_d1

After looking at the diagnostics documentation for that linked sample project, it seems like many modules do not allow that level of diagnostics to report a 2nd error until the 1st one clears.

That said, there are ways in that diagnostics sample project to detect the one event and regardless of whether it indicates a multi-error or not, perform the deep dive into every channel on that module for errors.

Look at the RALRM instruction help, especially the notes, and see if helps explain it better than I just did. 

Jaya1189

 Hi huggy,

Diag.diag82 is for another module. The example was used for two modules. In my case i just used one. That is why minimized the other. The other side break is in channel 2. Also regarding the count, i am able to get the counts for how many times OB82 is called. But the error storage is always one. I don't understand why.

Is there any difference in central IO module and decentral IO modjle diagnostics?

Thanks,

Jay 

 

 Thanks again Huggy,

I did read that line as you mentioned. But just wanna know which module supports individual channel diagnostics and which module doesn't. I will try to find a list of modules from SIEMENS support as you mentioned, but also would like to keep this thread open , just maybe someday there will be some ideas to make it possible. Just being optimistic.

and again thanks alll for responding to this request.

Jay

huggy_d1

See below the bold/underlined prior response. I think you are trying to find something that may not exist.

At this point, I suggest submitting a support request to Siemens.  Ask how to detect simultaneous diagnostics on all channels on your specific modules.

Jaya1189

 Hi huggy,

Thanks for the reponse again and I tested the RALRM function. But still I couldn't figure out what exactly i missing to achieve individual channel diagnostics. I think I am weak in handling this Diagnostic option using RALARM function. I am still able to get only one channel diagnostics. Sorry for the late reply, just now got the time to check this project again.

Thanks,

Jay

huggy_d1

After looking at the diagnostics documentation for that linked sample project, it seems like many modules do not allow that level of diagnostics to report a 2nd error until the 1st one clears.

That said, there are ways in that diagnostics sample project to detect the one event and regardless of whether it indicates a multi-error or not, perform the deep dive into every channel on that module for errors.

Look at the RALRM instruction help, especially the notes, and see if helps explain it better than I just did. 

 

 Hi Hati,

Thanks. Yes you are right, i am aware that the ET200SP modules give in depth channel diagnostics. But will be great if I can find a list of modules which can support individual channel diagnostics and modules which won't support such function. I had also raised a support request, initial conversation with them says that it is not possible. But i had asked some more details and look around options to achieve the same.

Lets see.

Thanks,

Jay

Hati

Siemens usually has HF (High Feature) modules that support more diagnostics. ET200SP has these modules, but i don't know if S7-1200 has any.

Update from SIEMENS Support for the above mentioned issue:

1. The conclusion is that it is not possible for this mentioned module S7-1200 TC in Central rack for this kinda individual diagnostics.

2. If you want to achieve this function,  a lots of modules supports individual channel diagnostics at the same time.
It means you could read the multi-error at the same time with specific instruction such as "RDREC".

3. In order to read the multi-error, what need your attention is that "RDREC" could be used for distributed component (PROFIBUS DP or PROFINET IO), not applicable for S7-1200 central rack.
There are lots of distributed modules such as ET200SP AI , ET200SP RTD/TC, etc.

4. For instance, when more than one channel occur Wire-break,  it could recognize both of them, the error info. like channel number , channel error type may report and return to the pre-defined parameter"Record" with "RDREC" instruction.
Just create "UDT" data type and DB, which include min 26 bytes for slot and one channel diagnostic.
About the struct , you may refer to this manual "From PROFIBUS DP to PROFINET IO".
https://support.industry.siemens.com/cs/us/en/view/19289930

5. Normally call "RDREC"instruction in OB, input parameters , such as ID number of your used distributed module, INDEX=16#800A, etc.

Then when recognize multi-error from different channel , the error info. will return to "RECORD".

Hope this information helps someone and thanks again for all the guys who responded to this thread.

Jay