Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Manuale Utente Scaricare il pdf (Pagina 243)

100

101

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Appendix B

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B-112

BASIC Example

The BASIC function code is 42.

DIM status : INTEGER

DIM iostat : INTEGER

DIM msgwbuf(5) : INTEGER

rem * MSG_WRITE_W_HANDLER - Set up handler to allow for a synchronous message

rem * write of msgwbuf. This function will wait for

rem * completion of the I/O before returning to the user.

rem * Size of buffer is 20 bytes, message number is 0,

rem * number of items to read is 5, the timeout value is

rem * 6 seconds, the coprocessor data type is integer,

rem * the plc data type is short and iostat gets the I/O

rem * completion code.

RUN AB_BAS (42,status,ADDR(msgwbuf(1)),20,1,5,6,5,3,ADDR(iostat))

References

MSG_READ_W_HANDLER();

Also see asynchronous functions

MSG_READ_HANDLER(); MSG_WRITE_HANDLER();

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Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Manuale Utente Pagina 243

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