FB_ASI_ReadParameter

VAR_IN_OUT

VAR_IN_OUT
    stParameterBuffer : ST_ParameterBuffer; 
END_VAR

stParameterBuffer: Data buffer for the background communication (type: ST_ParameterBuffer).

VAR_INPUT

VAR_INPUT
    iParameternumber : WORD;
    bCycleMode       : BOOL;(*0: Acyclic , 1:Cyclic (permanent Read/Write) *)
    bStart           : BOOL;
END_VAR

iParameterNumber: parameter number.

bCycleMode: 0: Acyclic, 1:Cyclic (permanent Read/Write). If this bit is set, the bBusy output is only cancelled when the bStart input is pulled to FALSE. No current value is present at the output yet if the bStart input is pulled to FALSE too early.

bStart: The respective task is carried out via a rising edge at this boolean input.

VAR_OUTPUT

VAR_OUTPUT
    bBusy               : BOOL;
    bErr                : BOOL;
    iErrornumber        : DWORD;(* Error code of ASI-Master *)
    iParameterReadvalue : BYTE;
END_VAR

bBusy: This output remains TRUE until the block has executed a command. While Busy = TRUE, no new command will be accepted at the inputs. Please note that it is not the execution of the service but its acceptance whose time is monitored.

bErr: This output shows the error status.

iErrornumber: contains the command-specific error code of the most recently executed command. Is reset to 0 by the execution of a command at the inputs.

iParameterReadvalue: I/O ID or ID code of the addressed slave.

Requirements