VS070QS-1618MDM1 Integrated Machine Temperature autotuning PID
202403 (V1.0) 42
In which,
is the error,
is the error at the previous moment,
is
the proportional gain,
is the integral time,
is the differential time, and
is the sampling period.
ON/OFF control mode: This control mode is switch control, namely
disconnecting the relay when exceeding the target temperature, and opening
the relay according to a certain control cycle when it is lower than the target
temperature value. This control mode still has partial errors after stabilizing,
which is applicable to scenarios without demanding requirements on control
accuracy.
Fast autotuning TPID control mode: When you select this control mode, you
must set the following parameters.
A. Target temperature
B. Real-time temperature
C. Control cycle time
D. Sampling time and other parameters
E. Temperature upper and lower limits
F. Autotuning coefficient
This mode requires that the target temperature shall meet the formula:
|Set value-target value|＞30℃.
After enabling the energy flow, the command auto-tunes a set of suitable control
parameters according to the control object in the heating process. After the
completion of the autotuning mode, the system outputs the autotuning parameters,
and automatically adjusts these parameters. The next time you use the tuned
parameters, you need to adjust to the manual mode and enter the autotuning
parameters for control. There will be a small temperature overshoot, but the error
will be within ± 1 ℃ after stabilization.
The tuning takes relatively short time. The autotuning effect is the best when it runs
in room temperature environment, which is applicable to scenarios with high
temperature requirements. The autotuning sampling time can be set to 200ms, and
the control cycle can be set to 2000ms. In an example, autotuning temperature is
60°C, the autotuning coefficient is 5, and the target temperature is 90°C. The curve is
as follows.
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