Mitsubishi Electric MELSEC iQ-R Series User Manual page 240

Bit Flag name
b9 Simultaneous
temperature rise
parameter error
status
b10 Self-tuning error
(Fixed to 0)
b11 to
b15
*1 The values of 'CH1 Simultaneous temperature rise gradient data' (Un\G554) and 'CH1 Simultaneous temperature rise dead time'
(Un\G555) ( Page 304 CH1 Simultaneous temperature rise gradient data, Page 304 CH1 Simultaneous temperature rise dead time)
*2 When this bit turns ON under any condition other than the ones described above, check the contents of the following table according to
the setting of 'CH1 Self-turning setting' (Un\G548).
Setting details
1: Starting ST (Only PID constants are
calculated.)
3: Starting ST (PID constants and
simultaneous temperature rise
parameters are calculated.)
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory area name
CH Self-tuning flag
CH Self-tuning flag (in the Q compatible mode)
This area is enabled only for the following channels.
• CH1 to CH4 of when the standard control is used
• CH3 and CH4 of when the mix control (normal mode) or mix control (expanded mode) is used
APPX
238
Appendix 3 Buffer Memory Areas
Description
This bit turns ON when the simultaneous temperature rise
*1
parameters cannot be calculated by the self-tuning.
This bit turns ON after one of the following operations is
*2
executed during the self-tuning.
• Changing the set value (SV) setting (only during the
start-up)
• Changing PID constants
• Changing the setting variation rate limiter
• Changing the output limiter
• Changing the output variation limiter setting
• Changing the control output cycle
• Changing the sensor correction
• Changing the primary delay digital filter
• Shifting AUTOMAN mode
• Switching direct/reverse action
This bit also turns ON in the following cases.
• When 6000 seconds (1 hour and 40 minutes) or longer
have passed after the self-tuning was started
• When the variation speed of the temperature process
value (PV) is slower than 1.125 (/min) during the
selftuning
• When the temperature process value (PV) becomes out
of the temperature measuring range
• When required measurement data was not obtained
because the manipulated value (MV) did not reach the
upper limit output limiter value or the lower limit output
limiter value before the completion of the measurement
• When the temperature process value (PV) that was
supposed to increase after the self-tuning was started
with the starting ST, and decreased by 1 () or more
instead
• When the temperature process value (PV) that was
supposed to decrease after the self-tuning was started
with the starting ST, and increased by 1 () or more
instead
(Not used)
Check contents
• Check if wiring is correct in control loop.
• Set 'CH1 Self-tuning setting' (Un\G548) to "4: Starting ST + vibration ST (Only PID constants are calculated for
both.)" and execute the control.
• Check if wiring is correct in control loop.
• When the simultaneous temperature rise parameters have been calculated, save the calculated parameters.
After that, set 'CH1 Self-tuning setting' (Un\G548) to "4: Starting ST + Vibration ST (Only PID constants are
calculated for both.)" and execute the control. When the simultaneous temperature rise parameters have not
been calculated, check if wiring is correct in control loop.
Condition in which the bit turns OFF
This bit turns OFF after one of the following operations is
executed.
• When 'Setting/operation mode command' (Y1) is turned
from ON to OFF and the mode shifts to the setting mode
• When 'CH1 Unused channel setting' (Un\G502) is set to
Unused (1)
• When 'CH1 PID control forced stop command' (YC) is
turned from OFF to ON
• When 'CH1 Self-tuning setting' (Un\G548) is set to Do
not execute ST (0)
This bit turns OFF in the following cases as well.
• When the self-tuning has started by the change of the set
value (SV)
• When the temperature process value (PV) becomes out
of the stable state and the vibration ST has started

CH1 CH2
411 611
575 607
CH3 CH4
811 1011
639 671