Omron Programmable Terminals NT631, Operation Manuals

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Connecting to the Host’s RS-422A/485 Port
Section 5-2
C-series C200HX/HG/HE(-ZE), CPM1 CPUs, SRM1
Connect to the RS-422A/485 port (port A) of the communication board. Note
that the connection to a CPM1 or/and SRM1 must be made via an RS-422A
adapter (CPM1-CIF11).
Reference There are no communication boards for which port B is the RS-422A port.
[PC system setting area settings]
When connecting to a C200HX/HG/HE(-ZE) or CPM1 CPUs or SRM1, set the
following communication conditions for the PC system setting area.
Item Setting at Host
I/O port RS-422A
Communication 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
*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 “Setting the Host Link
Method” (page 173).
Set the PC system setting area settings directly from a peripheral tool (e.g. SYS-
MAC support software).
For details on operations relating to the PC system setting area, refer to the
manual for the PC which is used.
The PC system setting 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(-ZE)
Word # Writing Value Settings
DM6555 0001 Host link mode, no CTS control
Communication conditions set by the contents of DM
DM6556 0303 Data length 7 bits, 2 stop bits, even parity,
communications speed: 9600 bps
0304 Data length 7 bits, 2 stop bits, even parity,
communications speed: 19200 bps
DM6558 0000 Unit # 00
When using a CPM1, SRM1
Word # Writing Value Settings
DM6650 0001 Host link mode, no CTS control
Communication conditions set by the contents of DM
DM6651 0303 Data length 7 bits, 2 stop bits, even parity,
communications speed: 9600 bps
0304 Data length 7 bits, 2 stop bits, even parity,
communications speed: 19200 bps
DM6653 0000 Unit # 00