3. Instructions
862
CS/CJ/NSJ Series Instructions Reference Manual (W474)
z Auxiliary Area Flags for Serial Communication Board's Ports
Related PLC Setup Settings for the CPU Unit's Built-in RS-232C Port
z CX-Programmer Settings
Port Name Address Contents
Port 1 Reception Completed Flag A356.06 ON when no-protocol reception is completed.
Number of Receive Bytes Specified: The flag will turn ON when the
specified number of bytes has been received.
End Code Specified: The flag will turn ON when the end code is received or
when 256 bytes have been received.
Reception Overflow Flag A356.07 ON when more than the expected number of receive bytes has been
received in no-protocol mode.
Number of Receive Bytes Specified: The flag will turn ON when more data
is received after reception was completed but before the received data was
not read from the buffer with RXD(235).
End Code Specified: The flag will turn ON when 257 or more bytes of data
are received without an end code.
Reception Counter A357 Counts in hexadecimal the number of bytes received in no-protocol mode
(0 to 256 decimal).
Overrun Error Flag CIO 1908 bit 04 ON when 260 or more bytes of data are received in the buffer before
RXD(235) is executed.
Port 2 Reception Completed Flag A356.14 ON when no-protocol reception is completed.
Number of Receive Bytes Specified: The flag will turn ON when the
specified number of bytes has been received.
End Code Specified: The flag will turn ON when the end code is received or
when 256 bytes have been received.
Reception Overflow Flag A356.15 ON when more than the expected number of receive bytes has been
received in no-protocol mode.
Number of Receive Bytes Specified: The flag will turn ON when more data
is received after reception was completed but before the received data was
not read from the buffer with RXD(235).
End Code Specified: The flag will turn ON when 257 or more bytes of data
are received without an end code.
Reception Counter A358 Counts in hexadecimal the number of bytes received in no-protocol mode
(0 to 256 decimal).
Overrun Error Flag CIO 1918 bit 04 ON when 260 or more bytes of data are received in the buffer before
RXD(235) is executed.
Ports 1 and 2 Inner Board Service Disabled Flag A424.04 ON when RXD(235) is executed for a Serial Communications Board that
does not support no-protocol mode (a Board without a version number).
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