dginbuffalo
Member
Hello- Looking for suggestions on a PID startup sequence with bumpless transfer. Basically I need to force and hold the output to different values when the machine is warming up. Once warm, it switches bumplessly to run mode and PID control. I've seen it done a few ways-
One is to put the PID in manual during warmup and move the values in. Once out of warmup, just switch the PID to auto.
2nd is to use the PID Inhold bit and Inhold value to manually move values in warmup mode. Once out of warmup, you just release the Inhold bit. I know this PID function is originally designed for use with a 1756 analog module on startup, but it really provides the function were looking to do.
Any other suggestions or feedback on these methods? Thanks.
One is to put the PID in manual during warmup and move the values in. Once out of warmup, just switch the PID to auto.
2nd is to use the PID Inhold bit and Inhold value to manually move values in warmup mode. Once out of warmup, you just release the Inhold bit. I know this PID function is originally designed for use with a 1756 analog module on startup, but it really provides the function were looking to do.
Any other suggestions or feedback on these methods? Thanks.