Omron SYSMAC CJ1W-SCU21-V1, Operation Manual

Page: 107 / 781

78
I/O Memory Allocations Section 2-3
Note 1. The default settings used for Host Link, protocol macro, and loopback test
modes areas follows: Baud rate: 9,600 bps, start bits: 1 bit, data length: 7
bits, parity: even, and stop bits: 2 bits.
The default settings used for Modbus-RTU slave mode are as follows:
Baud rate: 19,200 bps, data length: 8 bits, parity: even, and stop bits: 1 bits.
2. A System Setup error will occur if 1, 3, 4, or 7 to E is set, and the Unit will
operate with the default Host Link settings (9,600 bps, unit number 00).
3. The PTs connected to the port must also be set for a 1:N NT Link. Com-
munications will not be possible if a PT is set for a 1:1 NT Link.
4. Do not set B to F settings, and baud rates that are not supported by the
serial communications mode. A System Setup error will result. Settings of
1 and 2 are reserved for the system and should not be used.
5. With CTS control, turn ON the request to send (RTS) signal before stating
to send, and be sure the clear to send (CTS) signal is ON before sending
data. When there is no CTS control, turn ON the request to send (RTS) sig-
nal before sending, and then send data without checking the request to
send (RTS) signal.
6. For settings below 00C8, use 00C8 Hex; for settings above 03E8, use
03E8 Hex.
D32008 D32018 m + 8 m + 18 15
Proto-
col
macro
Transmission method
0: Half-duplex; 1:Full-duplex
04 to 14 Reserved
03 Clearing/holding the contents of the reception buffer in full-
duplex mode (Unit Ver. 1.2 or later only)
0: Clear; 1: Hold
02 Link word specification data exchange timing (Unit Ver. 1.2 or
later only)
0: On-request I/O refreshing
1: Continuos I/O refreshing
00 to 01 Reserved
D32009 D32019 m + 9 m + 19 00 to 15 Maximum number of bytes in protocol macro send/receive
data (00C8 to 03E8 hex: 200 to 1,000 bytes)
Words Bit Setting contents
Board
(CS Series only)
Unit
(CS/CJ Series)
Port 1 Port 2 Port 1 Port 2