Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 31

PD control
PD control is a control method in which the derivative time (D) is set in addition to P control. The control mechanism is the
same as P control.
■Setting method
Make the settings as described below.
• 'CH1 Integral time (I) setting' (Un\G432): 0 to 0 (s) (Page 136 CH1 Integral time (I) setting)
PID control
PID control is a control method in which derivative elements are added to PI control, and thereby the temperature shifts to a
stable status in a short period of time even when a drastic change has occurred. By setting the derivative time (D) properly,
the controlled object shifts to a stable status in a short period of time.
■Settings method (If using standard PID control)
Make the settings as described below.
• 'CH1 Proportional band (P) setting' (Un\G431): Any value ( Page 135 CH1 Proportional band (P) setting)
• 'CH1 Integral time (I) setting' (Un\G432): Any value ( Page 136 CH1 Integral time (I) setting)
• 'CH1 Derivative time (D) setting' (Un\G433): Any value ( Page 137 CH1 Derivative time (D) setting)
■Settings method (If using heating-cooling PID control)
Make the settings as described below.
• 'CH1 Heating proportional band (Ph) setting' (Un\G431): Any value ( Page 136 CH1 Heating proportional band (Ph)
setting)
• 'CH1 Cooling proportional band (Pc) setting' (Un\G439): Any value ( Page 140 CH1 Cooling proportional band (Pc)
setting)
• 'CH1 Integral time (I) setting' (Un\G432): Any value (Page 136 CH1 Integral time (I) setting)
• 'CH1 Derivative time (D) setting' (Un\G433): Any value (Page 137 CH1 Derivative time (D) setting)
Parameters related to control methods
The following table shows the parameters related to each control method.
Parameter Setting range
Two-position
control
Input range setting • Thermocouple: 0 to 35
• Platinum resistance thermometer: 36 to 45
• Micro voltage input: 46 to 47
Set value (SV) setting Set a value within the temperature measuring range of the set input range.
Adjustment sensitivity 1 to 100 (0.1 to 10.0%)
(dead band) setting
Upper limit output The set value is
limiter, lower limit ignored.
output limiter (standard
PID control only)
Upper limit output The set value is
limiter, cooling upper ignored.
limit output limiter
(heating-cooling PID
control only)
Output change ratio The set value is
limiter ignored.
Control output cycle The set value is
setting ignored.
Cooling control output The set value is
cycle setting (heating- ignored.
cooling PID control
only)
Overlap/dead band -100 to 100 (-10.0 to 10.0%)
setting
P control PD control
The set value is ignored.
-50 to 1050 (-5.0 to 105.0%)
0 to 1050 (0.0 to 105.0%)
1 to 1000 (1 to 100.0%/s)
• Settings range: 5 to 1000 (0.5 to 100.0 s)
• Default value: 300 (30.0 s)
• Settings range: 5 to 1000 (0.5 to 100.0 s)
• Default value: 300 (30.0 s)
PI control PID control
4 FUNCTION
4.3 Control Method
4
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