Mitsubishi MELSEC L Series User Manual page 166

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3 COMMUNICATIONS BY THE MODEM FUNCTION
Data registration processing for
initialization subroutine
• Sets the number of bytes of the
registration data
• Sets the user control data
(control number)
• Sets the initialization command
• Write the data for initialization
(Data No. 8001
(Registration to buffer memory)
• Data registration complete flag for
initialization is set
Modem initialization processing subroutine
• Initialization request signal is set
• Initialization request execution flag is set
• When the initialization complete signal
ON, the initialization complete flag is
set and the request signal is reset
• When the initialization/connection
abnormal complete signal ON, the error
code is read and the request signal
is reset
Data communication processing
subroutine
(Non procedure protocol, transmission)
• Set the transmission data
• Sets the number of transmission data
(words)
• Transmission request execution flag
is set
• Transmission request execution
• Transmission request normal
completion
• Transmission request abnormal
completion
)
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