172-65710M-04 (SC-F71 Parameters/Functions) 23 Dec 2021
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Requirements for Startup tuning (ST) start
Begin Startup tuning (ST) when all following conditions are satisfied:
Operation
state
RUN/STOP transfer
RUN
Auto/Manual transfer
Auto mode
Remote/Local transfer
Local mode
Autotuning (AT) setting
PID control
Parameter
setting
Startup tuning (ST) is set to ON (Execute once, Execute always)
Output limiter high
0.1%, Output limiter low
99.9%
[Heating/Cooling PID control type: Output limiter high (heat-side)
0.1%]
The Level PID action selection
is done by other than “Switching by the
Measured value (PV).”
Input value
state
The Measured value (PV) is not underscale or over-scale.
Input error determination point (high)
Input value
Input error determination
point (low)
At Startup tuning (ST) at Set value (SV) change, the Measured value (PV)
shall be stabilized.
Set value (SV) > Measured value (PV) [Heating/Cooling PID control]
Output value
state
At startup, output is changed and saturated at the Output limiter high or the
Output limiter low [Heating/Cooling PID control type: Output limiter high (heat-
side)].
Requirements for Startup tuning (ST) cancellation
Startup tuning (ST) will be immediately aborted if any in the cancel condition in the
AT/ST status monitor is met. The PID values will be the same as before Startup
tuning (ST) was activated.
R
efer to “AT/ST status monitor” for details.
Startup tuning (ST) may be aborted in the following cases except for the conditions in
“AT/ST status monitor.”
Autotuning (AT) has been started.
When the instrument is in FAIL state.
When the power supply is disconnected.
Parameter setting
Input 1_Startup tuning (ST) [Operation Transfer Mode]
Parameter symbol
Data range
Factory set value
1.
U
ST U
oFF
:
ST unused
on1
:
Execute once *
on2
:
Execute always
* When ST is finished, the control will automatically return to
“
oFF
.
”
oFF
To display
“Input 1_Startup tuning (ST) “, 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_Startup tuning (ST) [Operation Transfer Mode]
Parameter symbol
Data range
Factory set value
2.
ST U
oFF
:
ST unused
on1
:
Execute once *
on2
:
Execute always
*
When ST is finished, the control will automatically return to “
oFF
.
”
oFF
To display
“Input 2_Startup tuning (ST) “, choose “2-loop control/Differential
temperature control” in Function block No. 58: Select function for Input 2
(Engineering mode), AND choose a setting other than “3 to 7 (Pressure control
operation [MC-
(V)COS(R)])” in Function block No.52: Input 2_Control action
(Engineering mode).
Summary of Contents for SC-F71
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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 ...
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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 ...
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Page 347: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 346 Operating procedure ...
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