Toshiba TOSVERT VF-S9 Instruction Manual page 119

(I-gain adjustment parameter)
This parameter adjusts the integral gain level during PI control. Any deviations remaining unremoved
during proportional action are cleared to zero (residual deviation offset function).
A larger I-gain adjustment value reduces residual deviations. Too large an adjustment value, however,
results in an unstable event such as hunting.
5) Adjusting analog command voltages
To use external analog setting (VIB) or feedback input (II/VIA), perform voltage-scaling adjustments as re-
quired. See Section 6.5.2 for further details.
If the feedback input data is too small, voltage-scaling adjustment data can also be used for gain adjustment.
Example of VIB terminal setting
(50 or 60Hz)
Residual deviation
Example of VIA terminal setting
(50 or 60Hz)
F-35
Process quantity setting value
Time
Example of II terminal setting
(50 or 60Hz)
E6580757
6