S7 PID Loop FB41


Thread Starter

Dennis Patterson

After performing some rate of change tests on FB41, i discovered thet the block acts like an "IDEAL" or "SEIRAL" PID not a "PARALLEL" as is stated in the help documentation. Then the help file contradicts itself as the process block diagram actually shows an "IDEAL" configuration. Is this help file going to get corrected i wonder? Or is there translation problem here?

Im glad i noticed it because the calcs i made for the loop were based on 'parallel' and it would have shut our plant down. As with the calcs I made based on 'ideal' are perfect.