SMC3_PersistPositionSingleturn (FB)¶

FUNCTION_BLOCK SMC3_PersistPositionSingleturn

This function block serves to persist the axis position of an absolute encoder that has a limited range.

Strictly speaking, this function block is not only for single-turn encoders but also for multi-turn encoders where the range of the encoder is a power of two and less than 2^32.

Both encoders with a range -2^k .. 2^k - 1 and a range 0 .. 2^(k+1) are supported.

For a more general function block, see SMC3_PersistPosition, which allows encoder ranges that are not a power of two (in bus increments).

InOut:

Scope	Name	Type	Initial	Comment
Inout	`Axis`	AXIS_REF_SM3
Inout	`PersistentData`	`SMC3_PersistPositionSingleturn_Data`
Input	`bEnable`	`BOOL`		`TRUE`: Activates FB, else inactive.
Input	`usiNumberOfAbsoluteBits`	`USINT`	16	Number of bits that are persistent (absolute encoded) [1..32].
Output	`bPositionRestored`	`BOOL`		`TRUE`: The position has been restored during the last start-up of the axis.
	`bPositionStored`	`BOOL`		`TRUE`: The position has been stored during the last call.
	`bBusy`	`BOOL`		`TRUE`: FB is not idle.
	`bError`	`BOOL`		`TRUE`: Error has occurred within the function block.
	`eErrorID`	`SMC_ERROR`		Error identification
	`eRestoringDiag`	SMC3_PersistPositionDiag	SMC3_PersistPositionDiag.SMC3_PPD_RESTORING_OK	Diagnostic information about restoring