nightline
Member
Gents,
I've a machine with a S7 313C PLC, and have to control a temperature. At this moment it's done by some timers, with a lot of temperature alarms.
So I found a sample program from Jan Steen Nielsen from Danmark, who programmed a FB121 Pid controller.
I've copy passed the FB121 with the DB121 instance block in the controller.
I've put the FB121 in FC70, and created the Data in DB70.
If I monitor DB121, I see a lot of parameters changing, except the output variable.
Has anyone any idea, what I do wrong?
Or is more information needed?
Thanks in advance!
Jack
I've a machine with a S7 313C PLC, and have to control a temperature. At this moment it's done by some timers, with a lot of temperature alarms.
So I found a sample program from Jan Steen Nielsen from Danmark, who programmed a FB121 Pid controller.
I've copy passed the FB121 with the DB121 instance block in the controller.
I've put the FB121 in FC70, and created the Data in DB70.
If I monitor DB121, I see a lot of parameters changing, except the output variable.
Has anyone any idea, what I do wrong?
Or is more information needed?
Thanks in advance!
Jack