Mitsubishi Electric MELSEC iQ-R Series User Manual page 109

■Conditions to execute the simultaneous temperature rise parameter setting with self-tuning
The conditions are the same as the ones for the starting ST. ( Page 49 Conditions for execution)
When the self-tuning cannot be started, the temperature control module operates as follows with the PID control continued.
• CH1 Self-tuning disable status (Un\G411, b8) is turned ON.
The following shows how the temperature control module operates when the self-tuning is not executed.
'CH1 Auto tuning status' (X4)
Control status
CH1 Self-tuning disable status
(Un\G411, b8)
(1) When the temperature control starts, the set value (SV) is changed, or vibration is detected
■When the simultaneous temperature rise parameter cannot be calculated
The simultaneous temperature rise parameter is not calculated under the following conditions:
• When the maximum ramp is not determined
• When the output saturation time is short
The temperature control module turns ON CH1 Simultaneous temperature rise parameter error status (Un\G411, b9).
'CH1 Auto tuning status' (X4)
Control status
'CH1 Simultaneous temperature rise gradient
data' (Un\G554)
and 'CH1 Simultaneous temperature rise
dead time' (Un\G555)
CH1 Simultaneous temperature rise
parameter error status (Un\G411, b9)
(1) When the temperature control starts, the set value (SV) is changed, or vibration is detected
To turn OFF CH1 Simultaneous temperature rise parameter error status (Un\G411, b9), set the following:
• Set "Do Not Run the ST" for "Self-tuning setting" in "Application Setting."
To calculate the simultaneous temperature rise parameter, execute the self-tuning again. However, execute it
after the temperature has dropped.
■Stopping of the calculation of the simultaneous temperature rise parameter
The optimum simultaneous temperature rise parameter may not be able to be calculated depending on the characteristics of
a controlled object. In addition, the temperature control module stops the calculation when the self-tuning has not been
completed with errors. For the conditions in which the self-tuning is completed with errors, refer to the following:
Page 52 Conditions in which the self-tuning ends in failure
■How to set the simultaneous temperature rise parameter with self-tuning
Select one of the following two settings for "Self-tuning setting" in "Application Setting."
• 2: Starting ST (Simultaneous temperature rise parameter only)
• 3: Starting ST (PID Constant and simultaneous temperature rise parameter)
[Navigation window]  [Parameter]  Target module  [Application Setting]  [Self-tuning setting]
OFF
PID control
ON
OFF
(1)
ON
OFF
PID control Self-tuning
OFF
Executed by the temperature control module
PID control
0
ON
1.32 Simultaneous Temperature Rise Function
1
1 FUNCTIONS
107