FB_EcFoeAccess

FB_EcFoeAccess 1:

This function block writes or reads data via the communication port of the “File access over EtherCAT” mailbox protocol.

FB_EcFoeAccess 2: Inputs

VAR_INPUT
    hFoe     : T_HFoe;
    pBuffer  : DWORD;    
    cbBuffer : UDINT;
    bExecute : BOOL; 
    tTimeout : TIME := DEFAULT_ADS_TIMEOUT; 
END_VAR

Name

Type

Description

hFoe

T_HFoe

"File access over EtherCAT" handle.

pBuffer

DWORD

Contains the address of the buffer into which the data are to be read (read access) or the address of buffer containing the data to be written (write access). The buffer can be a single variable, an array or a structure, whose address can be found with the ADR operator.

cbBuffer

UDINT

Contains the number of data bytes to be written or read.

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.

FB_EcFoeAccess 3: Outputs

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

cbDone

UDINT

Number of the most recent successfully written or read data bytes

bEOF

BOOL

End of File, this variable becomes TRUE if the end of the file is reached during read access. For write access this variable has no purpose.

Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT v3.1.0

PC or CX (x86, x64, ARM)

Tc2_EtherCAT