Omron Programmable Terminals NT631 Setup Manual page 120

Connecting to the Host's RS-422A/485 Port
PLC Setup Area Settings
When connecting to a C200HX/HG/HE(-Z)E or CPM1, CPM2A, CPM2C,
CQM1H CPU Units or SRM1, set the following communications conditions for
the PLC Setup area.
Item
I/O port
Communications 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 NT631/NT631C. For details, refer to 6-7-2 Setting the
Host Link Method (page 155).
Set the PLC Setup area settings directly from a Programming Device (e.g.
CX-Programmer).
For details on operations relating to the PLC Setup area, refer to the manual
for the PLC which is used.
The PLC 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 Communications Board of C200HX/HG/HE(-Z)E
Word # Setting
DM6555 0001
DM6556 0303
0304
DM6558 0000
When using a CPM1, CPM2A, CPM2C, SRM1
Word # Setting
DM6650 0001
DM6651 0303
0304
DM6653 0000
When using a CQM1H
Word # Setting
DM6550 0001
DM6551 0303
0304
DM6553 0000
Setting at Host
RS-422A
Host link mode
Set the same speed as for the NT631/NT631C.
2 stop bits
Even
ASCII 7 bits
00
Setting Contents
Host link mode, no CTS control
Communications conditions set by the contents of DM
Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 9600 bps
Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 19200 bps
Unit # 00
Setting Contents
Host link mode, no CTS control
Communications conditions set by the contents of DM
Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 9600 bps
Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 19200 bps
Unit # 00
Setting Contents
Host link mode, no CTS control
Communications conditions set by the contents of DM
Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 9600 bps
Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 19200 bps
Unit # 00
Section 5-2
(*1)
103