To understand the PID block (software) in RSlogix software follows the below steps. The second one is as a software block in PLC or DCS programming.

One is a Single-stand-alone microcontroller-based hardware controller unit. However IIRC when I had my physicist friend give a quick hand, the biggest problem was in that the I/D did not have a settable gain only a repeat. PID Controllers are generally available in two types. many programmers confuse the two platforms when setting up PID control. on the other hand, the external trigger/timer that you’ve posted would be correct for MOST RSLogix5 applications. once again, in RSLogix500, the PID rung should have NOTHING on it except for the PID instruction itself.

Fine for slower processes, it's been a pain to squeeze it to do some tension controls. yes, that arrangement is INCORRECT for RSLogix500. Even if I set SCP as: -819 to 16383, scale 0 - 145.15 gpm on PLC I am still under. The one thing I've ran into is the PID implementation in rslogix 500 isn't great. According to the manual K factor is 206.69 which is used on signet panel itself for present flow and total flow. Also known as a 3 term controller because it has three terms, they are used to modulate an output known as a Control Variable (CV) based on a Process Variable (PV), in relation to a set point (SP). I/O Modules for SLC 500 Programmable Controllers Technical Data. Average day is about 25k gallons, so it is significant.į8:19 comes from another subroutine but it is also a flow meter scaled in a similar manner but different model, so called blind signet. What is a PID loop PID is an acronym for Proportional, Integral, Derivative. SLC PID block followed by the CompactLogix processor as well as the Siemens 1200 and. Is not it suppose to be zero when there is no flow? Meter is set up correctly: K factor and range 0 -70 GPM.įE103(Flow Meter) I have scaled for PID 60 Hz and 450 ms. I am totalizing flow every day, however there is significant discrepancy about 2 thousand gallons a day PLC is under. I have ML 1400 with Signet 2551 flow meter.

Pid rslogix 500