Omron Programmable Terminals NT31 NT31C Setup Manual page 120

Connecting to the Host's RS-422A/485 Port
CQM1H CPUs or SRM1, set the following communication conditions for the PC
Setup area.
Item
I/O port
Communication mode
Communications speed
Stop bit
Parity
Data length
Unit #
*1 Set the host link communications speed at 9600 bps or 19200 bps with the
Comm. Speed at the NT31/NT31C. For details, refer to Setting the Host Link
Method (page 158).
Set the PC Setup area settings directly from a Programming Device (e.g. CX-
Programmer).
For details on operations relating to the PC Setup area, refer to the manual for
the PC which is used.
The PC Setup area word numbers and settings to be made depending on the
unit to which the connection is made are shown below.
When using port A of the communication board of C200HX/HG/HE(-Z)E
Word # Writing Value
DM6555 0001
DM6556 0303
0304
DM6558 0000
When using a CPM1, CPM2A, CPM2C, SRM1
Word # Writing Value
DM6650 0001
DM6651 0303
0304
DM6653 0000
When using a CQM1H
Word # Writing Value
DM6550 0001
DM6551 0303
0304
DM6553 0000
Setting at Host
RS-422A
Host link mode
Set the same speed as for the NT31/NT31C.
2 stop bits
Even
ASCII 7 bits
00
Settings
Host link mode, no CTS control
Communication conditions set by the contents of DM
Data length 7 bits, 2 stop bits, even parity,
communications speed: 9600 bps
Data length 7 bits, 2 stop bits, even parity,
communications speed: 19200 bps
Unit # 00
Settings
Host link mode, no CTS control
Communication conditions set by the contents of DM
Data length 7 bits, 2 stop bits, even parity,
communications speed: 9600 bps
Data length 7 bits, 2 stop bits, even parity,
communications speed: 19200 bps
Unit # 00
Settings
Host link mode, no CTS control
Communication conditions set by the contents of DM
Data length 7 bits, 2 stop bits, even parity,
communications speed: 9600 bps
Data length 7 bits, 2 stop bits, even parity,
communications speed: 19200 bps
Unit # 00
Section 5-2
(*1)
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