FB_EcReadBTN

The function block FB_EcReadBTN can be used to read the BTN from the EEPROM of an EtherCAT slave via ADS. For this the slave must contain the BIC in the EEPROM.

Inputs

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

Name	Type♠	Description
sNetId	T_AmsNetId	String containing the AMS network ID of the EtherCAT master device. (Type: T_AmsNetId)
nSlaveAddr	UINT	Fixed address of the EtherCAT slave to which the SDO upload command should be sent.
bExecute	BOOL	The function block is activated by a positive edge at this input.
tTimeout	TIME	Maximum time allowed for the execution of the function block.

Outputs

VAR_OUTPUT
    bBusy  : BOOL;
    bError : BOOL;
    nErrId : UDINT;
    sBTN   : STRING()9
END_VAR

Name	Type	Description
bBusy	BOOL	This output is set when the function block is activated, and remains set until a feedback is received.
bError	BOOL	This output is set after the bBusy output has been reset when an error occurs in the transmission of the command.
nErrId	UDINT	Supplies the ADS error code associated with the most recently executed command if the bError output is set.
sBTN	STRING()9	This output contains (after an error-free run) the BTN of the EtherCAT slave after the bBusy output has been reset, e.g. "0002agdw".

Sample of an implementation in ST

PROGRAM TEST_EcReadBTN
VAR
    fbEcBTN    : FB_EcReadBTN;
    sNetId     : T_AmsNetId := '172.16.2.131.2.1';
    bExecute   : BOOL := TRUE;
    nSlaveAddr : UINT := 1006;
    sEcBTN     : STRING;
    bError     : BOOL;
    nErrId     : UDINT;
END_VAR

fbEcBTN(sNetId:= sNetID, nSlaveAddr:= nPort, bExecute:= bExecute, tTimeout:= T#5S);
IF NOT fbEcBTN.bBusy THEN
     bExecute := FALSE;
     IF NOT fbEcBTN.bError THEN
          sEcBTN := fbEcBTN.sBTN;
     END_IF
     fbEcBTN(bExecute:= bExecute);
END_IF

Prerequisites

Development environment	Target platform	PLC libraries to include
TwinCAT v3.1.0	PC or CX (x86, x64, Arm^®)	Tc2_EtherCAT