GE IS200GGXDG1ABB interface module

The magnitude (in rpm) of speed error at which the control automatically switches to fast response. The control uses the absolute value of speed error to make this switch. The absolute value is the difference between the speed reference and the speed. A Window Width too narrow will result in cycling that always factors in the Gain Ratio (see Figure 3-18). Note: This menu item was added in revision “G” version of software. It will not show up in previous versions.

The ratio of the Gain setting at steady 

state to the Gain setting during transient conditions. The Gain Ratio operates in conjunction with the Window Width and Gain adjustments by multiplying the Gain set point by the Gain Ratio when the speed error is greater than the Window Width. This makes the control dynamics fast enough to minimize engine-speed overshoot on start-up and to reduce the magnitude of speed error when loads are changing. This allows a lower gain at steady state for better stability and reduced steady-state actuator linkage movement (see Figure 3-18). Note: This menu item was added in revision “G” version of software. It will not show up in previous versions.

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