Reconfigure (FB)¶

FUNCTION_BLOCK Reconfigure EXTENDS ETrig

This function block reads and applies the whole configuration of the corresponding device and all subdevices. After Reconfiguring all changed configuration values (Enable flag, Parameter changes, …) take effect. If device doesn’t support reconfiguring eError returns ERROR.NOT_SUPPORTED.

Example

Following example code disables a slave device beneath a fieldbus master.

 PROGRAM PLC_PRG
 VAR
     iState : INT := 0;
     reconfig : DED.Reconfigure;
 END_VAR

 CASE iState OF

    0: //Disable slave device: Slave1 (= name in device tree)
       Slave1.Enable := FALSE;
       iState := 1;

    1: //start reconfiguring of fieldbus master
       reconfig(xExecute := TRUE, itfNode := Master);
       IF reconfig.xDone THEN
           iState := 3;
       ELSIF reconfig.xError THEN
           iState := 2;
       END_IF

    2: //reconfiguring error
       //TODO: Add code here
       reconfig(xExecute := FALSE);

    3: //reconfiguring successful ==> slave disabled
       //TODO: Add code here
       reconfig(xExecute := FALSE);

END_CASE

Bemerkung

This feature may not be supported by all fieldbus drivers. eError will return ERROR.NOT_SUPPORTED if not supported.

InOut:

Scope	Name	Type	Comment	Inherited from
Input	`xExecute`	`BOOL`	Rising edge: Action starts Falling edge: Resets outputs If a falling edge occurs before the function block has completed its action, the outputs operate in the usual manner and are only reset if either the action is completed or in the event of an error. In this case, the corresponding output values (`xDone`, `xError`) are present at the outputs for exactly one cycle.	ETrig
Output	`xDone`	`BOOL`	`TRUE`: Action successfully completed	ETrig
	`xBusy`	`BOOL`	`TRUE`: Function block active	ETrig
	`xError`	`BOOL`	`TRUE`: Error occurred, function block aborts action `FALSE`: No error	ETrig
Input	`itfNode`	INode	The node to be reconfigured.
Output	`eError`	ERROR	operation error code