getexternaleventvalue: Get Current Value of an External Event

Function Description

Use this function to get the value associated with an external event task.

NOTE: The function must be called from within an external event task.

To see the general representation in IL or ST language, refer to the chapter Function and Function Block Representation.

This table describes the input variables:

Inputs	Type	Comment
pValue	POINTER TO DINT	Address of the variable where the value is copied if the function returns EXTEVT_VAL_OK.

This table describes the output variables:

Outputs	Type	Comment
GetExternalEventValue	EXTEVT_VAL_RES	Returns one of the following values: EXTEVT_VAL_OK: Valid value EXTEVT_VAL_FAILED: Unable to obtain value EXTEVT_VAL_NOT_IN_EXT_EVT_TASK: Function was not called from within an external event task EXTEVT_VAL_NOT_AVAILABLE: No value available for this external task

Outputs

Type

Comment

GetExternalEventValue

EXTEVT_VAL_RES

Returns one of the following values:

EXTEVT_VAL_OK: Valid value
EXTEVT_VAL_FAILED: Unable to obtain value
EXTEVT_VAL_NOT_IN_EXT_EVT_TASK: Function was not called from within an external event task
EXTEVT_VAL_NOT_AVAILABLE: No value available for this external task