FB_EcGetAllSyncUnitSlaveAddr

The FB_EcGetAllSyncUnitSlaveAddr function block allows the addresses of all the slaves connected to the master to be read. When the call is successful, the buffer passed in the parameter pAddrBuf contains the addresses of all the slaves as an array of UINTs.

Inputs

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

Name	Type	Description
sNetId	T_AmsNetId	The network address of the TwinCAT computer on which the function block is to be executed can be specified here. An empty string may be specified for the local computer.
nObjectId	OTCID	Object Id of the Sync Unit to be used, see Sync Unit
pAddrBuf	POINTER TO ARRAY [0..EC_MAX_SLAVES] OF UINT	Address of an array of UINTs into which the addresses of the individual slaves are to be written.
cbBufLen	UDINT	Maximum available buffer size (in bytes) for the data to be read.
bExecute	BOOL	The function block is enabled 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;
    nSlaves : UINT; 
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. Error 1798 (0x706) indicates a null pointer at the buffer address. Error 1797 (0x705) indicates inadequate buffer size.
nSlaves	UINT	The number of slaves connected to the master.

Requirements

Development Environment	Target platform	PLC libraries to include
TwinCAT v3.2.4024.14	PC or CX (x86, x64, Arm^®)	Tc2_EtherCAT >= 3.3.17.0