Declaring and calling an instance of the IEC60870-5-101 controlling station

Here you can unpack the complete PLC sources: TutorialSample.zip

The complete functionality of a controlling station is encapsulated in the FB_IEC870_5_101Master function block. An instance can be used to establish a connection to the controlled station. For establishing a further connection a further instance of the function block can be declared.

Add the following PLC code to the declaration part of P_MAIN_LowSpeed:

PROGRAM P_MAIN_LowSpeed
VAR
    AODB        : ARRAY[0..49] OF ST_IEC870_5_101AODBEntry;
    hTable      : T_HAODBTable;

    init        : BOOL := TRUE;
    initError       : UDINT;
    asduAddr        : UDINT := 7;

    inputs AT%IB0   : ARRAY[0..2999] OF BYTE;
    outputs AT%QB0  : ARRAY[0..2999] OF BYTE;
    memory AT%MB0   : ARRAY[0..2999] OF BYTE;
    data        : ARRAY[0..2999] OF BYTE;


     bEnable         : BOOL := TRUE;
    client      : FB_IEC870_5_101Master;

ND_VAR

and the instance is called in the program part:

IF init THEN
    init := FALSE;
...
ELSE
...

    client(
        pAOEntries := ADR( AODB ),
        cbAOEntries := SIZEOF( AODB ),
        pInputs := ADR( inputs ),
        cbInputs := SIZEOF( inputs ),
        pOutputs := ADR( outputs ),
        cbOutputs := SIZEOF( outputs ),
        pMemory := ADR( memory ),
        cbMemory := SIZEOF( memory ),
        pData := ADR( data ),
        cbData := SIZEOF( data ),
        bEnable := bEnable,
        hSerial := P_SerialComm_HighSpeed.hSerial,
        hTable := hTable );

...
END_IF