F_iecGetSPI
This function decodes the single point information from byte variable. One byte variable yields up to 8 single points information. Every single point information occupies 1 bit.
FUNCTION F_iecGetSPI: E_IEC870_5_101SPI
VAR_INPUT
in : BYTE; (* Byte variable from where the single point information have to be decoded *)
offset : UDINT(0..7); (* Single point information offset *)
END_VAR
Example:
Decoding the information of 4 single points from byte variable.
PROGRAM MAIN
VAR
memarea AT%MB0 : ARRAY[0..10] OF BYTE;
eSPI : E_IEC870_5_101SPI;
ENd_VAR
eSPI := F_iecGetSPI( memarea[0], 0 );
eSPI := F_iecGetSPI( memarea[0], 1 );
eSPI := F_iecGetSPI( memarea[0], 2 );
eSPI := F_iecGetSPI( memarea[0], 3 );
Requirements
Development Environment | Target System | PLC libraries to include |
|---|---|---|
TwinCAT v2.10.0 Build >= 1324 | PC or CX (x86, ARM) | TcIEC870_5_101.Lib ( Standard.Lib; TcBase.Lib; TcSystem.Lib; TcUtilities.Lib are included automatically ) |