creat PID in S7 312-2DP

[helal]

HI ,I can relate with plc siemens s7;
but Ican'nt creat pid loop in S7 312-2DP
please, anyone tell me how create this PID
waiting

 

[palithad]

IF the facility is not there, try to code it to work as in the PID loop

 

[Manglemender]

There are standard PID blocks in the Siemens library e.g. FB41 but, depending upon what you are trying to control and processor current workload, a 312-2Dp may not be fast enough. You could write your own PID loop which would be faster in excecution but the processor may still be too slow.

Nick

 

[dchartier]

HI ,I can relate with plc siemens s7;
but Ican'nt creat pid loop in S7 312-2DP
please, anyone tell me how create this PID
waiting

Hello Helal;
You might have made a mistake in the model of the CPU you are using, as there is no model CPU 312-2DP in Siemens' offerings. Even the mot modern 312C does not have an integrated Profibus-DP port.
The standard CPU 312 does not carry (allow the use...) of SFB41, the integrated Continuous PID loop controller . The 312C does. So accuracy does matter in your case.
Please come bacl to the forum with more details for us.
Hope this helps,
Daniel Chartier

 

[helal]

Hello Helal;
You might have made a mistake in the model of the CPU you are using, as there is no model CPU 312-2DP in Siemens' offerings. Even the mot modern 312C does not have an integrated Profibus-DP port.
The standard CPU 312 does not carry (allow the use...) of SFB41, the integrated Continuous PID loop controller . The 312C does. So accuracy does matter in your case.
Please come bacl to the forum with more details for us.
Hope this helps,
Daniel Chartier

thank you alot ,already I made mistake our type what I want to creat pid is (cpu 315-2dp),when I creat pid from =start-simatic-step7-pid i can't continue this procedure ,please tell me what are step to creat pid to control of pressure which sent from 4-20ma:beerchug: i wait you,