Omron EJ1 User Manual page 238

Determining the Error from the Current Situation for Communications Errors
Cannot connect online
Connection
PC
Connection port
Computer Serial port
EJ1
(EDU)
K3SC-10: Interface Converter
Cannot connect online
Connection
PC
Connection port
Computer ---
EJ1
(HFU)
Status
There is no power supply to
the EJ1.
There is no power supply to
the Interface Converter.
(RS-232C)
The CX-Thermo Support Soft-
ware settings are incorrect.
K3SC-10
EJ1
(RS-485)
Connection
port
Port A
The Interface Converter com-
munications conditions are
different from the EJ1 commu-
nications settings.
The Interface Converter con-
nection is incorrect.
There is no device on the
communications path with the
specified unit number.
There is a device on the com-
munications path with the
same unit number.
The EJ1 is connected to port
C on the HFU.
(RS-232C/
RS-485)
EJ1
Connection
port
Port C
Possible cause
Supply power from the EDU power
supply terminal.
Supply power to the Interface Con-
verter.
Correct the communications settings.
Serial port:
Baud rate:
Data length:
Stop bits:
Parity:
Unit number:
Note Match the serial port and unit
Refer to the Interface Converter man-
ual and match the communications
conditions to the EJ1 communica-
tions settings.
Refer to the computer, Interface Con-
verter, and EJ1 manuals and wire the
connection correctly.
Specify a unit number in the commu-
nications settings for a device on the
communications path.
Change the unit number in the com-
munications settings so that the unit
numbers are not duplicated.
The CX-Thermo Support Software
cannot be connected to the HFU.
Connect it to port A on the EDU.
Section 8-4
Countermeasure
COM (See note.)
38.4 (kbps)
7 (bit)
2 (bit)
Even (bit)
(See note.)
number settings to the system
used.
213