Siemens PID_Compact help

kalabdel

Member
Join Date
Feb 2015
Location
Ontario
Posts
1,108
Hello gentlemen,

I'm getting the error "The output value limits are not configured correctly" as I try to pretune a PID project that is actually one of Siemens' SCE example projects
They provided all the code and I followed the instruction but no matter what values I use I get the same error.

When I skip Pretuning the PID output takes minutes to reach the set point then goes right by it and stops at the "Process value high limit"

I know nothing about PID and that was the point of trying various examples. The way I understand it is that PID will use some sort of fancy algorithm to reach the set point and stay there or very close to it. Then why does it go to the high limit, and why does it take so long? Is it because I didn't pretune?

Thanks
Kal
 
It is most likely because of the limit settings, try adjusting the Output value limits so the fit the process.

PID Compact.jpg
 
I had a similar issue not long ago, but don't recall how we solved it. If it is not solved by BNA's suggestion, try to recompile the program..
 
Thanks BNA and bonelsess. I modified the values to not get any errors but pre-tuning still doesn't work as the progress bar seems to just freeze and after waiting fro 15-20 minutes I usually give up and try something else which also doesn't work. This, and other examples, were suppose to be for learning! But I haven't been able to get any of them to work.
I've been trying to understand how PID in Simatic TIA works on and off for probably 6 months and can't say I mad any progress and likely to put it off again till I have more time to waste.

Thanks a lot

Kal
 

Similar Topics

I have set up some "PID_Temp" loops in a 1517F3 processor and they seem to work ok. For pressure and flow rate I've used "PID_Compact". The issue...
Replies
2
Views
2,617
Using siemens block to control pressure level. The PV is pressure in Bar and the output is vsd fan speed in %. What I require is when the PV is...
Replies
6
Views
3,069
Hello all, A group I am involved with is just completing converting a Siemens APACS control system over to an RSLogix PLC. The subject came up of...
Replies
1
Views
1,208
Hi, Have problem with getting PID to work. Have been using 4x different programmers on siemens, not one could make PID to work as I want. Problem...
Replies
6
Views
1,757
Urgent, Commissioning deadline. I am using CONT_C in a function block. I call the FB in a Cyclic Program (OB32). when the PID is in manual I...
Replies
10
Views
3,276
Back
Top Bottom