Setting The Communications Protocol - Omron CJ2 CPU UNIT User Manual

Cj2 cpu unit hardware
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4 Support Software
Connecting Cable
Use the following cable to connect the CJ2 CPU Unit to the computer running the Support Software.
Port at Unit
Serial port
(RS-232C)
(D-sub, 9-pin,
female)
Precautions for Safe Use
• When the above cable connector is connected to the PLC serial port (RS-232C), be sure to
discharge static electricity by touching grounded metal before touching the cable connector.
The XW2Z-@@@S-CV Cable is particularly resistant to static electricity because it uses a
static-resistant connector hood (XM2S-0911-E). Even when this Cable is used, however, be
sure to discharge static electricity before touching the connector.
• Use the specialized cable described above for connecting cable. Using ordinary commercially
available RS-232C cable for personal computers may result in damage to external devices and
the CPU Unit.
Additional Information
It is possible to create RS-232C cable for connecting to the serial port (RS-232C). The connec-
tors shown in the following table are included with the CJ2 CPU Unit as standard equipment for
creating cables. For details on creating cables, refer to A-4 Connecting to a Serial Port on the
CPU Unit.
Name
Plug
Hood

Setting the Communications Protocol

Select the protocol for communications between the PLC and the CX-Programmer. For a SYSMAC
WAY (Host Link) connection, turn OFF pin 5 of the DIP switch on the front panel. For a peripheral bus
connection (faster than SYSMAC WAY), turn ON pin 5.
CX-Programmer Settings
The method for connecting the PLC to the personal computer is set using the CX-Programmer. For
details on using the CX-Programmer to set the connection method, refer to the CJ2 CPU Unit Software
User's Manual (Cat. No. W473).
4-8
Network type
Port at
(communications
computer
mode)
D-sub,
Serial communications
9-pin, male
Model
XM2A-0901
9-pin, male
XM2S-0911-E
9-pin static-resistant connector
with millimeter screws
Model
Length
XW2Z-200S-CV
2 m
XW2Z-500S-CV
5 m
Specifications
Use in combination. (One of
each is provided as standard
equipment with the CPU Unit.)
CJ2 CPU Unit Hardware User's Manual
Remarks
Use a static-resis-
tant connector.

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