Mitsubishi Q Series User Manual

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MELSEC-Q
3 SPECIFICATIONS
(c) Auto tuning operation
Auto tuning performs operation as shown below.
1) Auto tuning output is provided.
2) Data collection starts when the process value returns to the set value
after the first overshoot and undershoot.
3) After data collection, auto tuning ends when PID constants and loop
disconnection detection judgment time are set.
Set value (SV)
(Temperature set value)
Time
Process value (PV)
Start of auto tuning
The first overshoot and
undershoot are ignored.
Data collection
Auto tuning in execution
End of auto tuning
Temperature
control
ON
OFF
Yn4,Yn5
Xn4,Xn5
ON
OFF
(d) Precautions for auto tuning
The following indicate the conditions under which auto tuning will result in
abnormal termination.
1) Any of the following setting items for the channel has been changed
during execution of auto tuning.
Buffer memory
address
(Decimal)
Setting item
CH1 CH2
Input range 32 64
Set value (SV) setting 34 66
Upper output limiter 42 74
Lower output limiter 43 75
Output variation limiter 44 76
Sensor compensation value setting 45 77
AT differential gap 46 78
AT additional lag 47 79
Primary delay digital filter setting 48 80
AT bias 53 85
Forward/reverse operation setting 54 86

Mitsubishi Q Series Specifications

General

Brand	Mitsubishi
Model	Q Series
Category	Control Unit
Language	English