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Connecting to the Host’s RS-422A/485 Port Section 5-2
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.
*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
When using a CPM1, CPM2A, CPM2C, SRM1
When using a CQM1H
Item Setting at Host
I/O port RS-422A
Communications mode Host link mode
Communications speed
Set the same speed as for the NT631/NT631C.
(*1)
Stop bit 2 stop bits
Parity Even
Data length ASCII 7 bits
Unit # 00
Word # Setting Setting Contents
DM6555 0001 Host link mode, no CTS control
Communications conditions set by the contents of DM
DM6556 0303 Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 9600 bps
0304 Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 19200 bps
DM6558 0000 Unit # 00
Word # Setting Setting Contents
DM6650 0001 Host link mode, no CTS control
Communications conditions set by the contents of DM
DM6651 0303 Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 9600 bps
0304 Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 19200 bps
DM6653 0000 Unit # 00
Word # Setting Setting Contents
DM6550 0001 Host link mode, no CTS control
Communications conditions set by the contents of DM
DM6551 0303 Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 9600 bps
0304 Data length 7 bits, 2 stop bits, even parity, communica-
tions speed: 19200 bps
DM6553 0000 Unit # 00