172-65710M-04 (SC-F71 Parameters/Functions) 23 Dec 2021
213
8.4 Setting PID Values Automatically (Startup tuning)
Startup tuning (ST) is a function which automatically computes and sets the PID
values (Proportional band: heat-side only) from the response characteristics of the
controlled system at power ON, transfer from STOP to RUN, and Set value (SV)
change.
Description of function
As simple autotuning, the PID values can be found in a short time without
disturbing controllability for controlled systems with slow response at power ON.
For controlled systems which require different PID values for each temperature
setting, the PID values can be found for each Set value (SV) change.
The setting items related to Startup tuning (ST) are shown below. Set them
according to the application used.
Setting item
Details
Setting mode
Start
condition
0
(Factory set value)
When the power is turned on, operation
is changed from STOP to RUN, or the
Set value (SV) is changed.
Engineering
mode
1
When the power is turned on or operation
is changed from STOP to RUN.
2
When the Set value (SV) is changed.
Execution
method
oFF
(Factory set value)
ST unused
Operation
transfer
mode
on1
Execute once
on2
Execute always
When Startup tuning (ST) function is activated in Heating/Cooling PID
control, only heat-side PID values are calculated and changed. Startup
tuning (ST) is not available when the temperature is downward. (PID values
for cooling cannot be calculated)
If Startup tuning (ST) is started when the ST start condition is at power on or
switching from STOP to RUN, the control will start with Hot start 2 even if the
setting is Hot start 1. Refer to 8.19 Changing the Action at Power ON
(Hot/Cold Start) for Hot/Cold start setting.
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 ...