Delta DVP-ES2 - Page 84

4 Temperature Measurement Module DVP 04PT-E2
4.9.2 PID Control Modes
DVP04PT-E2 offers 3 types of control modes for the PID control.
1. Percentage Control Mode (CR: output percentage)
Application 1:
If the heater or cooler you are using is controlled by a power switch (On/Off), you can read out the output
percentage (0~100%) from DVP04PT-E2 and adopt GPWM instruction as a cyclic control. Please refer to the
wiring method below:
TC/PTPLC
(FROM/TO)
CR (output
percentage)
ON/OFF


Target
temperature
Example
:
Connect the sensor to CH1 of DVP04PT-E2 and use FROM instruction to read the output percentage
(CR#131). Connect the heater/cooler with Y0 and apply GPWM instruction to control the cyclic output.
PLC program description:
1. Read CR#131 (CH1 output percentage)
2. If output percentage D10=500 and output cycle D20=2000, width of output pulse D22 (t)=output cycle(T) 
CR#131 / 1000 (unit: 0.1%) = D20  D10 / 1000 = 2000  500/1000=1000
3. Apply GPWM instruction to control the output pulse width and output cycle so as to control the connected
heater/cooler.
4. Program:
M
1
FROM
K0 K131 D10
K1
MUL D20 D10
D30
GPWM
D22
D20
Y0
MOV
K2000 D20
DIV D30 K1000
D22
5. Diagram of output pulse:
Output Y0
t=1000ms
T=2000ms
DVP-ES2 Module Manual
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