Hello
I have ML 1400 with Signet 2551 flow meter. I am totalizing flow every day, however there is significant discrepancy about 2 thousand gallons a day PLC is under.
Meter is set up correctly: K factor and range 0 -70 GPM.
On PLC side:
FE103(Flow Meter) I have scaled for PID 60 Hz and 450 ms. It never shows as zero always 6 or 7. Is not it suppose to be zero when there is no flow?
I am off by 2-3k gallons every day. Average day is about 25k gallons, so it is significant.
F8:19 comes from another subroutine but it is also a flow meter scaled in a similar manner but different model, so called blind signet.
I was given spec of SCH 80 PVC pipe 2". According to the manual K factor is 206.69 which is used on signet panel itself for present flow and total flow. I am reading of signet panel into PLC. For 20 mA GPM manual shows 145.15. Sensitivity is 0. Even if I set SCP as: -819 to 16383, scale 0 - 145.15 gpm on PLC I am still under.
Not sure where the problem in my code or PLC scan time or the way I am going about scaling?
Any pointers would be appreciated
I have ML 1400 with Signet 2551 flow meter. I am totalizing flow every day, however there is significant discrepancy about 2 thousand gallons a day PLC is under.
Meter is set up correctly: K factor and range 0 -70 GPM.
On PLC side:
FE103(Flow Meter) I have scaled for PID 60 Hz and 450 ms. It never shows as zero always 6 or 7. Is not it suppose to be zero when there is no flow?
I am off by 2-3k gallons every day. Average day is about 25k gallons, so it is significant.
F8:19 comes from another subroutine but it is also a flow meter scaled in a similar manner but different model, so called blind signet.
I was given spec of SCH 80 PVC pipe 2". According to the manual K factor is 206.69 which is used on signet panel itself for present flow and total flow. I am reading of signet panel into PLC. For 20 mA GPM manual shows 145.15. Sensitivity is 0. Even if I set SCP as: -819 to 16383, scale 0 - 145.15 gpm on PLC I am still under.
Not sure where the problem in my code or PLC scan time or the way I am going about scaling?
Any pointers would be appreciated