Mitsubishi Electric MELSEC iQ-R Series User Manual page 108

■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 AT simultaneous temperature rise parameter calculation error status
(Un\G413, b1).
'CH1 Auto tuning command' (Y4)
'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 AT simultaneous temperature rise
parameter calculation error status
(Un\G413, b1)
Simultaneous temperature rise parameter setting with self-tuning
The control response at the temperature rise is constantly monitored during self-tuning and the simultaneous temperature rise
parameter is calculated based on the characteristics of a controlled object.
For details on the self-tuning function, refer to the following:
Page 47 Self-tuning Function
■Operation with the simultaneous temperature rise parameter setting with self-tuning
The temperature control module operates as follows:
Operation of the temperature control module
1 When the self-tuning has been normally started, 'CH1 Auto tuning status' (X4) turns from ON and the simultaneous temperature rise parameter is
calculated.
2 A calculation value is stored in the buffer memory when the simultaneous temperature rise parameter has been properly calculated. The module
turns ON CH1 Simultaneous temperature rise parameter correction status (Un\G411, b1) and turns OFF 'CH1 Auto tuning status' (X4), and the
control is shifted to the PID control.
'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 correction status
(Un\G411, b1)
(1) When the temperature control starts, the set value (SV) is changed, or vibration is detected
1 FUNCTIONS
106
1.32 Simultaneous Temperature Rise Function
ON
OFF
ON
OFF
PID control
OFF
Executed in a program
Executed by the temperature control module
ON
OFF
PID control
OFF
(1)
Executed by the temperature control module
Auto tuning PID control
0
ON
Self-tuning
PID control
Calculated
0
value
ON