Jump to content

Recommended Posts



use for a long time Vsion 120 and recently Vision 130. For the current application I need PID controller. The controller must have a '' manual '' and '' auto'' mode. I used auto-tune PID, and it works, but when the ''manual' mode switch to 'auto' on my CV to assume a value which was not in manual mode, you can not allow. Do you have an example of some of these applications, or how else am I to solve the problem. Otherwise it is a continuous regulation of pressure on the oil system? (control valve)  Thank you in advance for your help!!

Link to comment
Share on other sites

What is the CV value changing to when put in manual mode, and what value were you expecting? You will need 2 configuration loops, one for the auto-tuned values, and one for the manual mode values. How are you switching from one to the other? Also, what values do you have set up within the manual mode?


Does the loop run or does it give an error status message?


There are several PID example programs that can be found in the VisiLogic help file under Help/ Examples/ Version 900/ Project Examples/ PID.

Link to comment
Share on other sites

Maybe I'm not good expressed. Under the CV I thought PID CV. (Control Value). I saw an example of "Bumples PID", so I needed something. I made a loop in manual mode, but when I switch on (button switching manual / auto) auto-tune PID(enable PID) control continues on with some of its value, not where my CV was in manual mode, and if I transfer that value to the variable . (PID CV). Also as in the case of transfer and PV to SP, to avoid any abrupt.

Link to comment
Share on other sites

  • 5 years later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...