learner
Lifetime Supporting Member
Hi there,
I need to wite the logic to control a cascaded PID loop with the following characteristica:
1- Master : Density
2- Slave : Water Flow
the customer requires that this loop has the following modes:
1- Master (Auto / Man / Cascade)
2- Slave ( Auto / Man / Cascade)
According to Rslogix 5000 Help menu, When you connect the two loops in cascade foramt, and in configuration tab choose the master and slave, and put them in automatic mode the two loops work in cascade mode.
However my client requires that that the loops, espacially the slave must have the "AUTO MODE" ,with independant set point, so he can tune the flow loop independantly ,using the flow transmitter.
My questions are:
1- is there a good reference regarding cascading loops in RSLOGIX 5000 to refer to.
2- When a loop is configured as SLAVE, Wouldn't "Auto mode" put it into Cascade mode automatically. basically, I would like to know if a loops is configured as a Slave cascade loop, how can it have independant Auto mode with separate set point.
Regards
I need to wite the logic to control a cascaded PID loop with the following characteristica:
1- Master : Density
2- Slave : Water Flow
the customer requires that this loop has the following modes:
1- Master (Auto / Man / Cascade)
2- Slave ( Auto / Man / Cascade)
According to Rslogix 5000 Help menu, When you connect the two loops in cascade foramt, and in configuration tab choose the master and slave, and put them in automatic mode the two loops work in cascade mode.
However my client requires that that the loops, espacially the slave must have the "AUTO MODE" ,with independant set point, so he can tune the flow loop independantly ,using the flow transmitter.
My questions are:
1- is there a good reference regarding cascading loops in RSLOGIX 5000 to refer to.
2- When a loop is configured as SLAVE, Wouldn't "Auto mode" put it into Cascade mode automatically. basically, I would like to know if a loops is configured as a Slave cascade loop, how can it have independant Auto mode with separate set point.
Regards