172-65710M-04 (SC-F71 Parameters/Functions) 23 Dec 2021
209
When the Output change rate limiter is used, you may not be able to obtain
appropriate PID constants by Autotuning (AT).
Refer to 8.5 Setting PID Values Manually for the manual setting of PID values.
Requirements for Autotuning (AT) start
Start Autotuning (AT) when all following conditions are satisfied:
To start Autotuning (AT), go to Operation transfer mode.
Operation state
RUN/STOP transfer
RUN
Auto/Manual transfer
Auto mode
Remote/Local transfer
Local mode
Autotuning (AT) setting
PID control (State before starting AT)
Parameter
setting
Input 1_PID control and
Temperature control
operation [MC-(V)COS]
Input 1_Output limiter high [heat-side]
0%
Input 1_Output limiter low [heat-side]
100%
Input 2_PID control and
Temperature control
operation [MC-(V)COS]
Input 2_Output limiter high
0%
Input 2_Output limiter low
100%
Heating/Cooling PID
control
Input 1_Output limiter high [heat-side]
0%
Input 1_Output limiter low [heat-side]
100%
Input 1_Output limiter high [cool-side]
0%
Input 1_Output limiter low [cool-side]
100%
Input value
state
The Measured value (PV) is not inside the Input error range.
[Input error range: Input error determination point (high)
Measured
value (PV), Input error determination point (low)
Measured value
(PV)]
Requirements for Autotuning (AT) cancellation
Autotuning (AT) is immediately aborted and PID control starts when an error is
detected in “AT/ST status monitor.” The PID values will be the same as before
Autotuning (AT) was activated.
R
efer to “AT/ST status monitor” on the previous page for details.
Autotuning (AT) may be aborted in the following cases except for the conditions in
“AT/ST status monitor.”
・
When the instrument is in FAIL state.
・
When the power supply is disconnected.
Parameter setting
Input 1_Autotunning (AT) [Operation Transfer Mode]
Parameter symbol
Data range
Factory set value
1.
U
AT U
oFF
: PID control
on
: Start Autotuning
When Autotuning (AT) is finished, the control will
automatically return to “
oFF
.”
oFF
To display “Input 1_Autotuning (AT)”, choose a setting other than “3 to 7
(Pressure control operation [MC-
(V)COS(R)])” in Function block No.51: Input 1_
Control action (Engineering mode).
Input 2_Autotunning (AT) [Operation Transfer Mode]
Parameter symbol
Data range
Factory set value
Summary of Contents for SC-F71
Page 17: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 16 ...
Page 18: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 17 Differential temperature control ...
Page 114: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 113 Setting procedure ...
Page 131: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 130 Setting procedure ...
Page 134: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 133 Setting procedure ...
Page 141: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 140 Setting procedure ...
Page 153: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 152 Setting procedure ...
Page 158: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 157 Setting procedure ...
Page 168: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 167 Setting procedure ...
Page 172: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 171 Setting procedure ...
Page 175: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 174 Setting procedure ...
Page 180: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 179 Setting procedure ...
Page 185: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 184 ...
Page 199: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 198 Setting procedure ...
Page 207: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 206 Setting procedure ...
Page 249: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 248 Setting procedure ...
Page 280: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 279 Setting procedure ...
Page 293: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 292 Checking PID values ...
Page 303: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 302 Setting procedure ...
Page 316: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 315 Setting procedure ...
Page 320: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 319 Setting procedure ...
Page 347: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 346 Operating procedure ...
Page 388: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 387 Setting procedure ...