I need to program the analog Pressure input so that I can control the VFD frequency in order to control the Pump speed. If i need to use the PID block in TIA please assist me with an example.

PLC used: S7-1200

Analog input 4-20 mA

Analog output 0-10 V

Hello,

S7-1200- Select as per your application requirement , lower one is 1212 DC/DC/DC or AC/DC/DC  for expansion module.

Analog input 4-20 mA

Analog output 0-10 V

under s71200 family you wont get 0 to 10 v range output  but need to use +/- 10V.

So you can select the AI/AO combined single module but its 4 channel.

For PID application plz go thru below link.

https://support.industry.siemens.com/cs/ww/en/view/100746401

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Here is an application example.

https://support.industry.siemens.com/cs/document/100746401/pid-control-with-pid_compact-(s7-1200)?dti=0&lc=en-WW

Depending on the drive you are using, you may be able to hook up the pressure sensor directly to it and use built-in PID controller.

Hey can you help me out in configuring the various parameters in  PID compact block for the same?

My application is simple i have an analog sensor and i have to control a pump via VFD.

As the pressure increase the speed of the pump should decrease and visa-versa.

Hi uiapl,

I don't think that you will receive the final backup, because the thread is four years old and the topic creator isn't a member of this community anymore. So please tell us your isse with all relevant details to recieve some help