FB_EcReqSlaveState

VAR_INPUT

VAR_INPUT
    sNetId      : T_AmsNetId;
    nSlaveAddr  : UINT;
    bExecute    : BOOL; 
    tTimeout    : TIME := DEFAULT_ADS_TIMEOUT; 
    state       : WORD; 
END_VAR

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

nSlaveAddr: Fixed address of the EtherCAT slave.

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

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

state: EtherCAT state the slave should be set to. Following values can be passed here:

VAR_OUTPUT

VAR_OUTPUT
    bBusy       : BOOL;
    bError      : BOOL;
    nErrId      : UDINT;
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.

Example of an implementation in ST:

PROGRAM TEST_ReqSlaveState
VAR
    fbGetSlaveState     : FB_EcReqSlaveState;
    sNetId      : T_AmsNetId := '172.16.2.131.2.1';
    bExecute    : BOOL;
    state       : WORD := EC_DEVICE_STATE_INIT;
    nSlaveAddr      : UINT := 1001;
    bError      : BOOL;
    nErrId      : UDINT;
END_VAR

fbGetSlaveState(sNetId:= sNetId, nSlaveAddr:= nSlaveAddr, bExecute:=bExecute, state:=state);
bError:=fbGetSlaveState.bError;
nErrId:=fbGetSlaveState.nErrId;

Requirements