[Time based temperature control]

On 7/12/2011 at 4:28 AM, Joe Tauser said:

You're going to have to write logic to create the ramps and soaks. Read the help on the Linear Block - you can load it with the start and end points of your graph segments and extract the linearized Y value to feed the setpoint of a PID block. You'll need to create your own timebase to feed the X values.

You can store the start temp, end temp, and ramp duration in a data table and page through it to load a common linear block.

If you could supply some example values I can write and post a simple program to get you started.

Joe T.

Firstly thank you for your valuable inputs and replies to posts on the Form. Much appreciated.

So I’m using the linearize block but am not sure which values should go where.

And also not sure with what you mean by “time base”?

To be specific I need to increase temperature from ambient to 1000C over 3hours.

Regards,

Hardus

["cannot communicate with the PLC with specified UnitID!"]

Hi,

Using Remote Opertator.

I'am connecting to a v130 via LAN.

TCP settings, PLC name, port nr are all correct.

I use Unit ID 0 (direct)

It did work in the past but now gives me:

"cannot communicate with the PLC with specified UnitID!"

Any ideas?

I can connect to it via Remote Access with the same settings.