Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Manual do Utilizador descarregar pdf (Página 238)

(".!.3,&,10(+%/

Appendix B

  

B-107

Returns

Status Symbolic Name Meaning



  -%.!0(,+ /1##%//&1)

     %//!'% +1*"%. (+2!)($

     (/ +,0 #,++%#0%$ ,. ,&&)(+%

     +2!)($ 0(*%,10 2!)1%

     +2!)($ #,-.,#%//,. $!0! 03-%

     +2!)($ 5 $!0! 03-%

    %//!'% !).%!$3 -%+$(+'

     %//!'% !",.0%$

    +2!)($ /(4% &,. ,-%.!0(,+

    (4% ,& "1&&%. 0,, /*!))

Description

Use the MSG_WRITE_HANDLER function to initiate the processing of

unsolicited message write instructions from the PLC-5 programmable

controller. This function puts an entry in the Message Control Table

(MCT) for the requested message number (0-31). When the PLC-5

programmable controller executes that message number, data from the

PLC-5 programmable controller is transferred to the specified user buffer.

This function is asynchronous. When this function is initiated, control is

returned to the application. Use MSG_WAIT to monitor/complete the I/O

operation. For the synchronous version of this command see

MSG_WRITE_W_HANDLER.

C Example

See MSG_WAIT on page B-102 for a complete example of asynchronous

message processing.

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Rockwell-automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User M Manual do Utilizador Página 238