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9 PID CONTROL FUNCTION
9.8 Examples of Program
81
9
Program
OUTHS ST0 K2000
MOV
SM402
Initial pulse
SM402
Initial pulse
Initial pulse
SM402
PID control is started
after auto-tuning
PID is executed
PID is executed
X010
PID control is started
after auto-tuning
X011
PID control is started
(without auto-tuning)
M4
ST0
Heater operation
cycle
M4
PID control is started
(without auto-tuning)
X011
M4
Auto-tuning is executed
ST0<D502
X010
MOV
SD6022
K5000
K500
SET
SET
K0MOV
RST
RST
D510PID
< ST0 D502
D500
RST
D500
The target value is set to 50
C
The sampling time is set to
500 ms
The operation direction is set to
backward operation
PID instruction
initial setting
Built-in analog monitor
CH1: SD6022
CH2: SD6062
0: Enable
1: Disable
Heater output control
The upper and lower limits of
output value is set to valid
The output value lower limit
is set to ON for 0 sec.
The built-in analog is set to used CH
CH1: SM6021
CH2: SM6061
The PID output is initialized
PID instruction
drive
PID is executed
The heater operation
cycle is set to 2 sec.
Preset
Heater output
D510
D511.0
D511.5
K2000MOV
The output value upper limit
is set to ON for 2 sec.
D532
D533
SM6021
D502
D502
M4
ST0
Y1
END
X010
PID control is started
after auto-tuning
MOV
SET
K500
K1800
K0MOV
SET
D511.6
The auto-tuning mode is set
to limit cycle method
The PV value threshold
(hysteresis) width (SHPV) is
set to 5.0°C
The output value upper limit
(ULV) is set to ON for 1.8 sec.
Auto-tuning
initial setting
The output value lower limit
(LLV) is set to ON for 0 sec.
Auto-tuning is started
D535
D536
D537
K-50MOV
The wait setting parameter
(kW) from the end of tuning
cycle to PID control start is
set to -50 (wait is not provided)
D538
D511.4
MOV