172-65710M-04 (SC-F71 Parameters/Functions) 23 Dec 2021
168
6.8 Suppressing Sudden Change in Output (Balanceless Bumpless)
Balanceless bumpless may be used to suppress sudden output change when the
control is transferred from Auto mode to Manual mode (or Manual mode to Auto mode).
Description of function
Manipulated output value, when transferred from Auto mode to Manual mode,
depends on the setting of “Manual manipulated output value selection.” Selection of
“Use the most recent manipulated output value” (balanceless bumpless function) or
“Use the Manual manipulated output value*” (bump action) can be selected in
“Manual manipulated output value selection.”
* The Manual manipulated output value is the last manipulated output value in Manual mode
before the mode is transferred from Auto mode to Manual mode.
Note that the Manual manipulated output value can be preset in advance in the Setup
setting mode before the mode is transferred to Manual mode.
When the mode is transferred from Manual mode to Auto mode, the
balanceless bumpless function is always activated.
Balanceless bumpless function
This function is used to prevent overload caused by the Manipulated output value (MV)
suddenly changing when Auto mode is transferred to Manual mode and vice versa.
(a) Transfer from Auto mode to Manual mode.
However, when the mode is transferred to Manual mode, the Manipulated
output value used in Auto mode will be used as the manual output value in
Manual mode.
(b) The manipulated output value is changed (Manual mode function)
(c) Transfer from Manual mode to Auto mode.
When the mode is transferred to Auto mode, the controller starts PID control
based on the MV used in Manual mode.
Bumpless action associated with Auto/Manual transfer at the time of memory area
selection
This instrument allows Auto/Manual transfer at the time of Memory area selection.
Selection of balanceless bumpless action and bump action can be made at the time of
Auto/Manual transfer.
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 ...
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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 ...
Page 388: ...172 65710M 04 SC F71 Parameters Functions 23 Dec 2021 387 Setting procedure ...