scimdarren
Member
Hi All
I am experimenting with a PID function (Step7), I want a pressure transducer to control an actuator to maintain a gas pressure in a tank.
I am using the Special function Block FB41, I have set up a Variable Table and gone through the online help file, gradually configuring the block.
After simulating an analogue signal in both PV_PER or PV_IN, I still cannot get an output in LMN or LMN_PER? I have used the useful Block diagram on the help file to trace my signal, I think I lose the signal in the final stages of the calculation, via LMNLIMIT and LMN_NORM?
Any ideas?
Cheers
Darren
I am experimenting with a PID function (Step7), I want a pressure transducer to control an actuator to maintain a gas pressure in a tank.
I am using the Special function Block FB41, I have set up a Variable Table and gone through the online help file, gradually configuring the block.
After simulating an analogue signal in both PV_PER or PV_IN, I still cannot get an output in LMN or LMN_PER? I have used the useful Block diagram on the help file to trace my signal, I think I lose the signal in the final stages of the calculation, via LMNLIMIT and LMN_NORM?
Any ideas?
Cheers
Darren
