Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 288

Auxiliary Area and CIO Area Allocations
Receiving Data (RXD(235)/RXDU(255))
Words
Board
(CS Series only)
RXD(235)
Port 1 Port 2
A35606 A35614
A35607 A35615
A35700 to A35800 to
A35715 A35815
A42404
--- ---
--- ---
--- ---
CIO 190804 CIO 191804
Unit
(CS/CJ Series)
RXDU(255)
Port 1 Port 2
Word n+9, Word n+19,
bit 06 bit 06
Word n+9, Word n+19,
bit 07 bit 07
Word n+10, Word n+20,
bits 00 to 15 bits 00 to 15
--- ---
A20200 to A20207
A203 to A210
A21900 to A21907
Word n+8, Word n+18,
bit 04 bit 04
n = CIO 1500 + 25 × unit number
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.
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.
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)
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.
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.
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.
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).
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.
Section 7-3
Bit
259