Valve keep position on switching Mode Auto/man

Hello ,

I'm using PCS7 v8.0 and the CFC bloc VlvAnl with a PID controller , I want that the MV of my controller start from the Manual Mv when switching from Man to Auto . and keep it position when switching from Auto to Man

Thanks

Hello rouk!

Please see the help of the APL.

In the topic "Manual and automatic mode for control blocks" I have found this information:

Switchover from automatic mode to manual mode

When changing over from "automatic mode" to "manual mode", the last valid control settings (Manipiulated Value MV)for the controller set in "automatic mode" remain valid until you change the control settings manually.

Switchover from automatic mode to manual mode

The switchover from manual to automatic mode can take place with or without the internal setpoint tracking the process value. You specify this behavior on the SP_TrkPV I/O, which can also be operated from the faceplate in the parameter view (Option "SP = PV"). For the blocks PIDConL and PIDStepL you can also change the behavior for the switchover via the parameter Feature bit Disabling bumpless switchover to automatic mode for controllers:

Switchover with internal setpoint tracking process variable

(SP_TrkPV = 1) means that in "Manual" mode the setpoint (SP) tracks the process value (PV) (bumpless switchover). After switching back to "Automatic" mode, the manipulated variable remains constant until the setpoint value (SP) is changed or the process value (PV) changes.

Jules Stohr - Stohr Industrial Automation

Hello rouk!

Please see the help of the APL.

In the topic "Manual and automatic mode for control blocks" I have found this information:

Switchover from automatic mode to manual mode

When changing over from "automatic mode" to "manual mode", the last valid control settings (Manipiulated Value MV)for the controller set in "automatic mode" remain valid until you change the control settings manually.

Switchover from automatic mode to manual mode

The switchover from manual to automatic mode can take place with or without the internal setpoint tracking the process value. You specify this behavior on the SP_TrkPV I/O, which can also be operated from the faceplate in the parameter view (Option "SP = PV"). For the blocks PIDConL and PIDStepL you can also change the behavior for the switchover via the parameter Feature bit Disabling bumpless switchover to automatic mode for controllers:

Switchover with internal setpoint tracking process variable

(SP_TrkPV = 1) means that in "Manual" mode the setpoint (SP) tracks the process value (PV) (bumpless switchover). After switching back to "Automatic" mode, the manipulated variable remains constant until the setpoint value (SP) is changed or the process value (PV) changes.

I use SP_TrkPV and it works , thanks Jules Stoh