259
Auxiliary Area and CIO Area Allocations Section 7-3
Receiving Data (RXD(235)/RXDU(255))
n = CIO 1500 + 25 × unit number
Words Bit
Board
(CS Series only)
Unit
(CS/CJ Series)
RXD(235) RXDU(255)
Port 1Port 2Port 1Port 2
A35606 A35614 Word n+9,
bit 06
Word n+19,
bit 06
Reception Completed Flag
1: Reception completed; 0: No reception or reception in
progress
This flag turns ON when the specified number of bytes are
received at the Board/Unit.
The flag turns OFF immediately after the CPU Unit has com-
pleted writing to I/O memory the data received using the
RXD(235) or RXDU(255) instruction.
A35607 A35615 Word n+9,
bit 07
Word n+19,
bit 07
Reception Overflow Flag
1: The specified number of bytes or higher has been received
at the Board/Unit (data continued to be received after the
Reception Completed Flag turned ON).
0: The number of bytes received at the Board/Unit has not
exceeded the specified number (data did reception did not
continue after the Reception Completed Flag turned ON).
This flag turns ON if the Board/Unit continues to receive data
after completing data reception.
The flag turns OFF immediately after the CPU Unit has com-
pleted writing to I/O memory the data received using the
RXD(235) or RXDU(255) instruction.
A35700 to
A35715
A35800 to
A35815
Word n+10,
bits 00 to 15
Word n+20,
bits 00 to 15
Reception Counter (specified number of receive data bytes)
Counts in hexadecimal the number of data bytes received
from 0 to 256 bytes (0000 to 0100 hex)
A42404 --- --- Inner Board Service Failure Flag (non-fatal error)
This flag turns ON when TXD(236)/RXD(235) is sent to a pre-
Ver. 1.2 Serial Communications Board that does not support
no-protocol mode.
--- --- A20200 to A20207 Communications Port Enabled Flags
Turns ON (1) if execution of the network communications
instructions (SEND(090), RECV(098), CMND(490),
PMCR(260)) including TXDU(256) and RXDU(255), is possi-
ble for the communications port.
--- --- A203 to A210 Communications Port Completed Codes
Stores the response code when network communications
instructions (SEND(090), RECV(098), CMND(490),
PMCR(260)) including TXDU(256) and RXDU(255) are exe-
cuted.
--- --- A21900 to A21907 Communications Port Error Flags
Turns ON (1) if an error occurs during execution of the network
communications instructions (SEND(090), RECV(098),
CMND(490), PMCR(260)) including TXDU(256) and
RXDU(255).
CIO 190804 CIO 191804 Word n+8,
bit 04
Word n+18,
bit 04
Overrun Error Flag
1: 260 bytes or higher received in the reception buffer before
execution of RXD(235)/RXDU(255) during no-protocol mode)
0: Normal (Data received in reception buffer is less than 260
bytes)
Note: If an overrun error occurs, the Overrun Error Flag can
be turned OFF by cycling the power or restarting the Board.
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