Hmm
I agree now with the interlocking in PLC. But I do have a difficulty now because of what the customer want. When they set a machine in manual mode, it must stop it's motors in cascade. This stopping is an automatic process and is written in S7-Graph. I have a Start-Graph and a Stop-Graph for each machine. When selecting manual mode, then the machine must stop first in cascade before the manual mode is really active. When Manual is active, then the actions can be done.
I agree now with the interlocking in PLC. But I do have a difficulty now because of what the customer want. When they set a machine in manual mode, it must stop it's motors in cascade. This stopping is an automatic process and is written in S7-Graph. I have a Start-Graph and a Stop-Graph for each machine. When selecting manual mode, then the machine must stop first in cascade before the manual mode is really active. When Manual is active, then the actions can be done.
Hi Jesper,
As an honest person I want to tell you that you're right.
The machine is a group of several machines that starts in cascade and stops in cascade. I did this in S7-Graph. I messed up by forcing myself to use S7-Graph for the automatic mode and not write any manual logic.
I rewrote the manual part with interlocking in the PLC. More logical situation.
You're reply made me think the last days and I now understand why you said to rewrite it. The interlocking may not be done in the HMI offcourse, it's nasty.
Sorry !!