Omron CQM1H - 08-2005, Руководство по эксплуатации

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Autotuning (AT)
PID calculations using the limit cycle method are performed when autotuning is
executed. Parameters cannot be written for loops that are currently being auto-
tuned.
Hunting cycle
Set point
AT executed for ON/OFF control
AT completed (ampli-
tude and hunting cycle
measurements com-
pleted)
Amplitude
Calculated
PID control
•
The limit cycle method causes hunting using ON/OFF control near the set point
to measure the hunting cycle and amplitude and uses the results to make cal-
culations for PID control.
•
Be sure to change the START AT command in the output word after the START
AT command has been sent and received. If the START AT command is left set
in the output word, autotuning will be executed again as soon as it is com-
pleted.
2-5 Wiring
Wiring
Units for Thermocouples
CQM1-TC201
(4 loops, NPN
outputs) CQM1-TC202
(4 loops, PNP
outputs) CQM1-TC203
(2 loops, heater burnout
alarm NPN outputs) CQM1-TC204
(2 loops, heater burnout
alarm PNP outputs)
Loop 2
Cold junction
compensator
Loop 4
Output 2
Output 4
+24 VDC
(from external
power supply)
Output 1
Output 3
Loop 3
Loop 1
Loop 2
Cold junction
compensator
Loop 4
Output 2
Output 4
+24 VDC
(from external
power supply)
Output 1
Output 3
Loop 3
Loop 1
Loop 2
Cold junction
compensator
Output 2
+24 VDC
(from external
power supply)
Output 1
Loop 1
Loop 2
Output 2
+24 VDC
(from external
power supply)
Output 1
Loop 1
Cold junction
compensator
•
Do not touch or remove the cold junction compensator.
•
The sensor must be of the type set on the input type DIP switch.
Wiring
Section 2-5