
B-63322EN-2/01 5. CNC/CUSTOMER'S BOARD WINDOW
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(c) Timing of application parameter transfer
<CNC side>
PRMWT
Parameter writing
PRMWE
<Application side>
Parameter reading
Fig. 5.3 (c) Application parameter transfer
• When the CNC-side process writes parameters to the CNC/customer's
board window, it sets PRMWT to 1.
• The application is requested to set the PRMWE to 1, after which it
becomes ready to read the parameters. After confirming that
PRMWE is 1, the CNC-side process performs the actual writing.
• The application must not read the parameters when the PRMWT is 1.
• After writing the parameters to the CNC/customer's board window,
the CNC-side process resets PRMWT to 0.
• When PRMWT is 0, the application side can read the parameters.
• The application is requested to reset PRMWE to 0, after it has read
the parameters from the CNC/customer's board window.
NOTE
It is not guaranteed that the CNC will complete
parameter writing within 8 ms. When the application
side uses a high-level process for parameter reading, if
parameter writing by the CNC has not ended, the
application must not wait in the current process. Instead,
it must wait in the next process.