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We have a pressure transmitter which is at a distance around 300 mtrs from PLC end... recently we had a problem that it is showing less value at local display of PIT and in SCADA... I checked the PIT by directly giving 24VDC and it is showing correct value, but when it is connecting to the SCADA it is showing wrong value in the sense of low reading... some times automatically it is showing correct reading. What I need from you is... will there is be any isolators that can be incorporated in between PLC and PIT??? If yes please let me know the information... and this PIT is of 2 wire system. Please do reply.
What may be the problem actually?
What may be the problem actually?