mpiFilterGainIndexSet sets the current gain index of a Filter (filter) to gainIndex. Writing the gain index controls what gain table is currently being used.
If the filter is in state MEIXmpSwitchType MEIXmpSwitchTypeMOTION_ONLY, the gain index is changed automatically by the firmware as described at MEIXmpSwitchType. Be aware that the filter can change the gain index in real-time, thereby overwriting your changes in this mode.
When the filter is in state MEIXmpSwitchType MEIXmpSwitchTypeNONE, the gain index is controlled by the user. This is the normal state when using mpiFilterGainIndexSet(...). Gain Scheduling is a feature that switches filter gains for the acceleration, deceleration, constant velocity, and idle states of motion. The post filters are not affected by gain scheduling. Standard algorithms are used with gain scheduling (PID, PIV).
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