Control Method - Mitsubishi Electric MELSEC iQ-R Series User Manual

1.2

Control Method

The following control methods can be achieved by setting a proportional band (P), integral time (I), and derivative time (D).
• Two-position control
• P control
• PI control
• PD control
• PID control
In the P control or PD control, the manual reset is enabled. (Page 32 Manual Reset Function)
Two-position control
Two-position control is a control method that uses the 0% manipulated value (MV) and 100% manipulated value (MV).
Turning ON and OFF the manipulated value (MV) repeatedly makes the temperature process value come close to the set
value (SV), and the temperature is kept constant.
By the setting in "Adjustment sensitivity (dead band) setting" of "Application Setting," the chattering of
transistor outputs under two-position control can be prevented. Configure the setting for the set value (SV).
■Standard control
The module operates as follows outside the setting range of "Adjustment sensitivity (dead band) setting" in "Application
Setting."
Condition
The temperature process value (PV) is below the lower limit of the adjustment
sensitivity (dead band).
The temperature process value (PV) is above the upper limit of the adjustment
sensitivity (dead band).
Temperature
process value (PV)
Set value (SV)
Transistor output
1 FUNCTIONS
18
1.2 Control Method
ON
OFF
Transistor output status
ON
OFF
Adjustment sensitivity
(dead band)
Time