FB_EcGetAllSlaveAddr

VAR_INPUT

VAR_INPUT
    sNetId      : T_AmsNetId;
    pAddrBuf    : POINTER TO ARRAY[0..EC_MAX_SLAVES] OF UINT; 
    cbBufLen    : UDINT 
    bExecute    : BOOL; 
    tTimeout    : TIME := DEFAULT_ADS_TIMEOUT; 
END_VAR

sNetId: This is a string that contains the AMS network identifier of the EtherCAT master device.

pAddrBuf: The address of an array of UINTs into which the addresses of the individual slaves are to be written.

cbBufLen:The maximum available buffer size for the data to be read, in bytes.

bExecute: The block is activated by a rising edge at this input.

tTimeout: Maximum time allowed for the execution of the function block.

VAR_OUTPUT

VAR_OUTPUT
    bBusy       : BOOL;
    bError      : BOOL;
    nErrId      : UDINT;
    nSlaves     : UINT; 
END_VAR

bBusy: This output is set when the function block is activated and remains set until an acknowledgement is received.

bError: This output is set up after the bBusy output has been reset if there has been an error in transmission of the command.

nErrId: Supplies the ADS error code associated with the most recently executed command if the bError output is set.

nSlaves: The number of slaves connected to the master.

Example of an implementation in ST:

PROGRAM TEST_GetAllSlaveAddresses
VAR
    fbGetAllSlaveAddr       : FB_EcGetAllSlaveAddr;
    sNetId          : T_AmsNetId := '172.16.2.131.2.1';
    bExecute        : BOOL;
    slaveAddresses      : ARRAY[0..255] OF UINT;
    nSlaves             : UINT := 0;
    bError          : BOOL;
    nErrId          : UDINT;
END_VAR

fbGetAllSlaveAddr(sNetId:= sNetId,pAddrBuf := ADR(slaveAddresses), cbBufLen:= SIZEOF(slaveAddresses), bExecute:=bExecute);
nSlaves:=fbGetAllSlaveAddr.nSlaves;
bError:=fbGetAllSlaveAddr.bError;
nErrId:=fbGetAllSlaveAddr.nErrId;

Requirements