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MLMstAbs

Description

Performs a move to an absolute position. Returns TRUE if the function succeeded.

Arguments

Input

BlockID	Description	ID name of the Master Block
	Data type	DINT
	Range	[-2147483648, 2147483648]
	Unit	n/a
	Default	—
Position	Description	Sets the value of the absolute destination position. When the Modulo is turned on, the Master Block moves to the targeted position during the corresponding period, calculated as follows: If the Position input is between 0 and the Modulo Position, then the Master Block moves within the current period (no position rollover). If the Position input is greater than the Modulo Position, then the Master Block moves during one of the next period (positive position rollover). The Master Block works similarly for negative positions: if the Position input is less than zero, then the Master Block moves during one of the previous period (negative position rollover).
	Data type	LREAL
	Range	—
	Unit	User unit
	Default	—

Output

Default (.Q)

Description

Returns true when function successfully executes

See more details here

Data type

BOOL

Unit

n/a

To reduce the load on the CPU, call MLMstAbs only once for each move. This can be achieved by adding a control variable, which is illustrated below.

          // Master: modulo is on and modulo range is 0 - 360 with rollover at 360
          
If Not MoveStarted Then
     Position := 500;
     MLMstAbs( PipeNetwork.MASTER, Position);
     MovesStarted := TRUE;
End_if;

Perform one of the following to prevent undesired axis movement if modulo is turned on.
- Verify that the Position value is within the modulo range.
- If the Position value is outside of the modulo range, call MLMstAbs function only once. See the TIP above for an example of how to do this.

Related Functions

MLMstWriteSpeed

MLMstWriteDecel

Examples

Structured Text

//Make an absolute positon move with a Master block called “MASTER” to position 1000.0
MLMstAbs( PipeNetwork.MASTER, 1000.0 );

Ladder Diagram

MLMstAbs: LD example

Function Block Diagram

MLMstAbs: FBD example

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