Command Remove '<variable>'

Symbol: Command Remove '<variable>' 1:

Function: The command removes an input or output variable from the POU and all POU usage points.

Call: Context menu Editor window > Refactoring

Requirements: The cursor is on the identifier of the variable to be removed in the declaration part of the POU.

The command first opens a dialog showing the information about the desired removal. After confirmation, the Refactoring dialog appears. A description of the dialog can be found in section “Command Add '<variable>'”.

If you accept the changes in Refactoring dialog, the corresponding input or output parameters are deleted at the usage points of the affected POU.

	In CFC, only the connection of the removed input or output to the function block is removed. The input or output itself is retained in the chart.

Sample in ST:

You use Refactoring to remove the input variable “nInput4” in a POU. An automatic adjustment is made at the respective usage points:

Before the removal:

F_Sample(nInput1 := nVarA + nVarB, nInput2 := 3, nInput4 := 1, nInput5 := TRUE);
F_Sample(nVarA + nVarB, 3, 1, TRUE);

After the removal:

F_Sample(nInput1 := nVarA + nVarB, nInput2 := 3, nInput5 := TRUE);
F_Sample(nVarA + nVarB, 3, TRUE);

See also:

PLC documentation: Refactoring