mpiFilterGainIndexGet gets the current gain index of a Filter (filter) and writes it to the location pointed to by gainIndex. Reading the gain index tells you what gain table is being used currently.
If the filter is in state MEIXmpSwitchType MEIXmpSwitchTypeMOTION_ONLY, the gain index is automatically changed by the firmware as described at MEIXmpSwitchType. When the filter is in state MEIXmpSwitchType MEIXmpSwitchTypeNONE, the gain index is controlled by the user.
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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