plc.ucd
Member
Hi guys,
I have some questions regarding the cascaded PID loops. I am working with RSLogix 5000, and I not using the built-in master/slave functionality.
This is a pre-heater application. I would like to use the outer loop to control the product temperature, and send its output to the slave setpoint. The slave loop controls the media temperature, in this case - hot water.
My questions are as follows:
The Output of the master loop is in percent. Is this the output that I send to the slave setpoint? Basically, a move instruction with Master.OUT -> Slave.SP.
The scaling on the slave loop matches scaling of the master loop. Is this correct?
Thanks so much.
I have some questions regarding the cascaded PID loops. I am working with RSLogix 5000, and I not using the built-in master/slave functionality.
This is a pre-heater application. I would like to use the outer loop to control the product temperature, and send its output to the slave setpoint. The slave loop controls the media temperature, in this case - hot water.
My questions are as follows:
The Output of the master loop is in percent. Is this the output that I send to the slave setpoint? Basically, a move instruction with Master.OUT -> Slave.SP.
The scaling on the slave loop matches scaling of the master loop. Is this correct?
Thanks so much.