Hi,

there is a post of Siemens in Forum - only in german language.

https://support.industry.siemens.com/forum/de/de/posts/wie-viele-pid-regler-kann-ich-mit-einer-s7-1200-s7-1500-maximal-verwenden/277775/?page=0&pageSize=10

There are theoretical limits for the maximum number of PID controller technology objects in the S7-1200 / S7-1500 which are calculated from the load, work and remanence memory. However, the influence on the CPU load should be taken into account. In practice, this is often the limiting factor.

Regards,

Towome

The better question (from a design perspective) might be: If I need 5 temp PIDs (all slow acting), is the s7-1200 capable provided there is little else for the PLC to do (like no motion control or high speed communications).  {Adjust the # of PID loops required for your project}

#Ak

Hi..

Anyone please suggest me how many temp PID can be configure in 

CPU 1215C DCDCDC for extruder application.

Thanks