FB_IEC870_5_104Master

VAR_IN_OUT

VAR_IN_OUT
    hTable : T_HAODBTable;
END_VAR

hTable: Application object database handle (hash table handle). The table handle must be initialised once with the function F_iecCreateTableHnd before it can be used.

VAR_INPUT

VAR_INPUT
    sSrvNetID   : T_AmsNetID := '';
    protPara    : ST_IEC870_5_104ProtocolParams := ( bControlDT := TRUE, bDTControlled := FALSE,
                  sRemoteHost := '', nRemotePort := 2404 );
    sysPara     : ST_IEC870_5_101SystemParams := ( bEndOfInit := FALSE, asduAddr := 11, tSyncTimeut := T#0s );
    acqPara     : ST_IEC870_5_101AcquisitionParams;
    pAOEntries  : POINTER TO ARRAY[0..IEC870_ANYSIZE_ARRAY] OF ST_IEC870_5_101AODBEntry := 0;
    cbAOEntries : UDINT := 0;
    pInputs     : PVOID := 0;
    cbInputs    : UDINT := 0;
    pOutputs    : PVOID := 0;
    cbOutputs   : UDINT := 0;
    pMemory     : PVOID := 0;
    cbMemory    : UDINT := 0;
    pData       : PVOID := 0;
    cbData      : UDINT := 0;
    bEnable     : BOOL := TRUE;
END_VAR

sSrvNetID: String containing the network address of the TwinCAT TCP/IP Connection Server. For the local computer (default) an empty string may be specified.

protPara: IEC 60870-5-104 protocol parameters.

sysPara: System parameter.

acqPara: Parameter for cyclic data acquisition.

pAOEntries: Address of the first application object database variable.

cbAOEntries: Byte size of the application object database variables.

pInputs: Address of the PLC process data area for the inputs.

cbInputs: Byte size of the PLC process data area for the inputs.

pOutputs: Address of the PLC process data area for the outputs.

cbOutputs: Byte size of the PLC process data area for the outputs.

pMamory: Address of the PLC process data area for the flags.

cbMamory: Byte size of the PLC process data area for the flags.

pData: Address of the PLC data area.

cbData: Byte size of the PLC data area.

bEnable: Activates/deactivates the function block (communication and connections).

The addresses can be determined with the ADR operator and the byte sizes with the SIZEOF operator.

VAR_OUTPUT

VAR_OUTPUT
    system      : ST_IEC870_5_104ExSystemInterface;
    eConnState  : E_SocketConnectionState := eSOCKET_DISCONNECTED;
    eDTState    : E_IEC870_5_104DataTransferState := eIEC870_STOPDT;
END_VAR

system: System interface. This variable is used by other IEC application functions as a communication interface for the IEC device (here: central station).

• Member variable system.device is expected by the F_iecSetAOQuality function as VAR_IN_OUT parameter, for example.
• Member variable system.device.errors is a device error FIFO. The PLC application can read and analyse registered errors.

eConnState: Status of the TCP/IP connection with the slave..

eDTState: Status of the IEC60870-5-104 data exchange (STARTDT, STOPDT)

Examples (High-Level interface):

• IEC 60870-5-104 minimal central station (master);
• IEC 60870-5-104 complex central station (master);

Further examples:

In the following example the device error FIFO is read cyclically, and the registered errors are written into the TwinCAT XAE->"Error List" window.

...

fbClient : FB_IEC870_5_104Master;(* IEC 60870-5-104 master function
block instance *)

...

...

REPEAT

    fbClient.system.device.errors.RemoveError( );

    IF fbClient.system.device.errors.bOk THEN

    ADSLOGSTR( ADSLOG_MSGTYPE_ERROR OR ADSLOG_MSGTYPE_LOG,
'IEC60870-5-104 master error: 0x%s',

            DWORD_TO_HEXSTR(
fbClient.system.device.errors.getError.nErrId, 8, FALSE) );

    END_IF

UNTIL NOT fbClient.system.device.errors.bOk

END_REPEAT

...

Requirements