Xinje XD Series User Manual

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Soft element function comments:
HD2.7: Auto tune bit
HD2.8: Successful flag of auto tune
M0: Normal PID control
M1: Auto tune control
M2: Enter PID control after auto tune
Operation steps:
1. Send the actual temperature to PID collection register
2. Set probably value for P, I, D, sampling period
3. Set ON auto tune control bit M1 to startup PID auto tune
4. M1 will be reset after the auto tune is finished
5. Set ON M0, use the PID parameters getting from auto tune
6. If the PID effect is not good by using the auto tune PID parameters, user can adjust the PID
parameters to get good effect.
Note: This PLC temperature PID control program is applicable to almost all temperature
control projects.
Example 2:
To control the target temperature 60℃ in step response mode.
Overshoot is permitted:
1. The target temperature 60℃ (600)
2. Parameters setting
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Xinje XD Series Specifications

General

Input Voltage	24V DC
Storage Temperature	-20°C to 70°C
Protection Class	IP20
Type	PLC
Series	XD
Programming Language	Ladder Logic, Instruction List
Communication Interface	RS232, RS485
Power Supply	24V DC
Digital Inputs	Available (number varies by model)
Digital Outputs	Available (number varies by model)
Analog Inputs	Available (number varies by model)
Analog Outputs	Available (number varies by model)
Output Type	Relay, Transistor
Number of Inputs	Varies by model (see Digital Inputs and Analog Inputs)
Number of Outputs	Varies by model (see Digital Outputs and Analog Outputs)
Operating Temperature	0°C to 50°C
Humidity	5% to 95% (non-condensing)