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Operating Conditions
Adaptive control is possible when all of the following conditions are met.
• Display Conditions for Adaptive Control Parameter
adpt (Adaptive Control) is displayed in the Initial Setting Level when all of the following conditions
are met.
• The Standard or Heating/Cooling parameter must be set to "Standard."
• The input type must be set for a temperature input.
• The PID ON/OFF parameter must be set to "PID."
• Conditions for System Performance Evaluation
System performance evaluation is performed when all of the following conditions are met.
• The Adaptive Control parameter must be set to "Automatic update" or "Notification."
• The Auto/Manual parameter must be set to "Auto."
• The Direct/Reverse Operation parameter must be set to "Reverse operation."
• The AT Execute/Cancel parameter must be set to "AT Cancel."
• The SP Ramp Set Value parameter must be set to "OFF."
• The SP Ramp Fall Value parameter must be set to "OFF" or "SAME."
• All of the model parameters must not be at the default values.
• The starting temperature must be separated from the set point by at least the adaptive control
operation possible deviation.
• The starting temperature must be separated from the set point by at least 10°C.
• The starting temperature must be at least 0°C.
• System performance evaluation must not start immediately after recovery from an input error.
Startup Conditions
• When power is turned ON with the RUN/STOP parameter set to RUN
• When the RUN/STOP parameter is changed from STOP to RUN after the power supply is
turned ON
Restrictions
1. Starting Temperature Restriction
If the control starting temperature is equal to or greater than the temperature set in the Adaptive
Control Operation Possible Deviation parameter, system performance will not be evaluated.
2. Set Point Change Restriction
The set point can be changed, but if the change is too large, system characteristics will change
and may influence control performance.
We recommend that you perform auto-tuning again if the set point is changed by more than the
following range.
Set point calculated during AT ±30%
E5@D Digital Temperature Controllers User's Manual (H224)
5 Advanced Operations
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