FB_IEC870_5_104SlaveGrp

VAR_IN_OUT

VAR_IN_OUT
    hServer         : T_HSERVER;
END_VAR

hServer: TCP/IP Server-Handle. The internal parameter of the Server-Handle variable has to be initialised with the function F_CreateServerHnd.

VAR_INPUT

VAR_INPUT
    protPara        : ST_IEC870_5_104ProtocolParams;
    sysPara         : ST_IEC870_5_101SystemParams;
    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;
    pConnections    : POINTER TO ARRAY[0..IEC870_ANYSIZE_ARRAY] OF ST_IEC870_5_104ServerConnection := 0;
    cbConnections   : UDINT := 0;
    bEnable         : BOOL := TRUE;
END_VAR

protPara: IEC 60870-5-104 protocol parameters.

sysPara: System parameter.

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.

pConnections: Address of the ST_IEC870_5_104ServerConnection array variables.

cbConnections: Byte size of the ST_IEC870_5_104ServerConnection array variables.

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_104SystemInterface;
    status  : ST_IEC870_5_104GrpStatus;
END_VAR

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

• 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 analyses registered errors.

status: Connection and data transfer status information.

Example (high-level interface):

• IEC 60870-5-104 substation (slave);

Further examples:

Call in FBD with up to 2 master connections:

PROGRAM test
VAR
    AODB            : ARRAY[0..49] OF ST_IEC870_5_101AODBEntry;
    inputs AT%IB0   : ARRAY[0..999] OF BYTE;
    outputs AT%QB0  : ARRAY[0..999] OF BYTE;
    memory AT%MB0   : ARRAY[0..999] OF BYTE;
    data            : ARRAY[0..999] OF BYTE;

    hServer         : T_HSERVER;
    server          : FB_IEC870_5_104SlaveGrp;
    connections     : ARRAY[0..1] OF ST_IEC870_5_104ServerConnection; (* Two master connections *)


    bEnable         : BOOL := TRUE;
    protPara        : ST_IEC870_5_104ProtocolParams;
    sysPara         : ST_IEC870_5_101SystemParams := ( asduAddr := 7 );
    status          : ST_IEC870_5_104GrpStatus;
    bError          : BOOL;
    iecError        : ST_IEC870_5_101ErrorFifoEntry;
END_VAR

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

REPEAT
    server.system.device.errors.RemoveError( getError=>iecError, bOk=>bError );
    IF bError THEN
        ADSLOGSTR( ADSLOG_MSGTYPE_ERROR OR ADSLOG_MSGTYPE_LOG, 'IEC 60870-5-104 slave error: 0x%s',
                DWORD_TO_HEXSTR( iecError.nErrId, 8, FALSE) );
    END_IF
UNTIL NOT bError
END_REPEAT

Requirements