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9 PID CONTROL FUNCTION
9.8 Examples of Program
77
9
Program
OUTHS ST0 K2000
MOV
X010
Auto-tuning is started
SM402
Initial pulse
D511.4
Auto-tuning is executed
Auto-tuning is executed
Auto-tuning is executed
Auto-tuning is executed
X010
Auto-tuning is started
M4
ST0
Heater operation
cycle
M4
M4
Auto-tuning is executed
ST0<D502
D511.4
MOV
MOV
MOV
MOV
MOV
SD6022
K5000
K500
SET
SET
K500
K2000
K0
K-50
SET
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
The auto-tuning mode is set to
limit cycle method
The PV value threshold
(hysteresis) width (SHPV) is
set to 5.0°C
PID instruction
initial setting
Built-in analog monitor
CH1: SD6022
CH2: SD6062
0: Enable
1: Disable
Heater output control
The output value upper limit
(ULV) is set to ON for 2 sec.
The output value lower limit
(LLV) is set to ON for 0 sec.
The wait setting parameter (kW)
from the end of tuning cycle to
PID control start is set to -50
(wait is not provided)
Auto-tuning is started
The built-in analog is set to used CH
CH1: SM6021
CH2: SM6061
The PID output is initialized
PID instruction
drive
Auto-tuning is executed
The heater operation
cycle is set to 2 sec.
Preset
Heater output
D510
D511.0
D511.6
D535
D536
D537
D538
D511.4
SM6021
D502
D502
M4
ST0
Y1
END