FB_RAIDFindCntlr 1:

This function returns the counter value of the RAID controller and the corresponding controller IDs.

The function block should be called once only in a PLC program!

The system performance can be dramatically affected by the cyclic calling of this function block.



    sNETID    : T_AmsNetId;
    bWrtRd    : BOOL;

sNETID: A string containing the AMS network ID of the target device to which the ADS command is sent (type: T_AmsNetID).

bWrtRd: The ADS command is triggered by the rising edge of this input.

tTimeOut: States the length of the timeout that may not be exceeded during execution of the command.


    stRAIDCntlrFound : ST_RAIDCntlrFound;
    nBytesRead       : UDINT;
    bBusy            : BOOL;
    bError           : BOOL;
    nErrorID         : UDINT;

stRAIDCntlrFound: Contains the number of RAID controllers found and their RAID controller IDs (type: ST_RAIDCntlrFound).

nBytesRead: Number of successfully returned data bytes.

bBusy: This output remains TRUE until the block has executed a command, but no longer than the time present at the ‘Timeout’ input. No new command will be accepted at the inputs as long as bBusy = TRUE. Please note that it is not the execution of the service, but the time during which it be may executed that is monitored here.

bError: This output is set to TRUE if an error occurs during the execution of a command. The command-specific error code is located in ‘nErrorId’. If the block has an timeout error, ‘bError’ is set to TRUE and ‘nErrorId’ is 1861 (hexadecimal 0x745). It is set to FALSE if a command is executed at the inputs.

nErrorID: Contains the command-specific error code of the commands executed last; it is reset to 0 by a command at the inputs.


Development environment

Target platform

PLC libraries to be integrated (category group)

TwinCAT v3.1.0

PC or CX (x86, x64, ARM)

Tc2_IoFunctions (IO)