F_iecGetSCS

This help function can be used to mask the single command state in a byte variable. In the TwinCAT PLC the single command state occupies one bit of process data. In a byte variable, the state of up to 8 single commands can therefore be mapped.

Syntax

FUNCTION F_iecGetSCS: E_IEC870_5_101SCS
VAR_INPUT
    in     : BYTE;
    offset : UDINT(0..7);
END_VAR

Inputs

in: Byte variable, from which the single command state is to be extracted.

offset: Bit offset of the single command.

Sample in ST

The state of the four single commands is masked.

PROGRAM MAIN
VAR
    memarea AT%M* : ARRAY[0..10] OF BYTE;
    eSCS          : E_IEC870_5_101SCS;
ENd_VAR

eSCS := F_iecGetSCS( memarea[0], 0 );
eSCS := F_iecGetSCS( memarea[0], 1 );
eSCS := F_iecGetSCS( memarea[0], 2 );
eSCS := F_iecGetSCS( memarea[0], 3 );

Requirements

Development environment	Target system type	PLC libraries to be linked (category group)
TwinCAT v3.1.4012.0	PC oder CX (x86, x64, Arm®)	Tc2_IEC60870_5_10x (Communication->IEC60870) Tc2_SerialCom (Communication->Serial) Tc2_TcpIp (Communication->TcpIp) Tc2_Utilities (System)