vedano
Member
Hi guys,
I am doing my final project at school, and I try to develop some libs for motion control. I try to use PLCopen standard as an inspiration.
My problem is, I have never done too much of PLC programming. There is a condition for the FB I am creating, that if any of the inputs are missing (open), FB should use the last values used. It's IEC standard. I don't know what to write as a condition for "OPEN". They are REAL number inputs.
IF INPUT=????? open?
Thx for help
I am doing my final project at school, and I try to develop some libs for motion control. I try to use PLCopen standard as an inspiration.
My problem is, I have never done too much of PLC programming. There is a condition for the FB I am creating, that if any of the inputs are missing (open), FB should use the last values used. It's IEC standard. I don't know what to write as a condition for "OPEN". They are REAL number inputs.
IF INPUT=????? open?
Thx for help