xenophanes
Member
Hi guys I am new to this forum, recently I am having problem in configuring my PID loop. 4-20ma loop is used to measure pressure and setpoint is 100 pascal. I am using built-in PID wizard in Micro/win 4.0 and it's set to auto tune.
the problem is if pressure drops to zero, PID loop starts to integrate and output starts to climb, BUT it's not appearing on output terminals of EM235. even when AQW0 is set for 32000 I see only 3.6 volts across output terminals. the WEIRDEST thing is that IF I force 32000 to output (through status chart) i get the FULL voltage across terminals, but NOT when PID loop's output is 32000.
this is driving me crazy I tell you.
PV is AIW6
out put is AQW0
is there something I am missing to configure it properly or what!
the problem is if pressure drops to zero, PID loop starts to integrate and output starts to climb, BUT it's not appearing on output terminals of EM235. even when AQW0 is set for 32000 I see only 3.6 volts across output terminals. the WEIRDEST thing is that IF I force 32000 to output (through status chart) i get the FULL voltage across terminals, but NOT when PID loop's output is 32000.
this is driving me crazy I tell you.
PV is AIW6
out put is AQW0
is there something I am missing to configure it properly or what!