JPCompounds
Member
- Join Date
- Aug 2004
- Posts
- 37
I am using a corolis flowmeter with a 4-20mA output for mass flow. The unit has a capacity of 661 lbs/hour but our typical rate is on the very low end of the scale, only 20-60 lbs/hour depending on our formulation requirements.
My problem is my controller/display is mounted inside my cabinet and connected to my SLC 5/04 PLC. The unit is sending a 4-20 mA signal to my input card.
I am able to scale the signal correctly and get a readout but it is highly variable. Much more so than the readout on the actual flowmeter display. Now is there a way inside the PLC to compute a rolling average of say 5-10 points and use that value for my externally displayed KEP touch panel?
I tried using a counters but I am not sure I have the configuration correct. Also tried just reading the value but it isn't very stable. We are on the low end of the span. Could this be my issue?
I have a few other analog inputs that work fine.
My problem is my controller/display is mounted inside my cabinet and connected to my SLC 5/04 PLC. The unit is sending a 4-20 mA signal to my input card.
I am able to scale the signal correctly and get a readout but it is highly variable. Much more so than the readout on the actual flowmeter display. Now is there a way inside the PLC to compute a rolling average of say 5-10 points and use that value for my externally displayed KEP touch panel?
I tried using a counters but I am not sure I have the configuration correct. Also tried just reading the value but it isn't very stable. We are on the low end of the span. Could this be my issue?
I have a few other analog inputs that work fine.