Toshiba VF-S9 manual I-gain adjustment parameter, Adjusting analog command voltages

E6580757

(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.

Process quantity setting value

Residual deviation

Time

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		Example of VIA terminal setting		Example of II terminal setting
						6
					(50 or 60Hz)
	(50 or 60Hz)		(50 or 60Hz)

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