Omron EJ1 User Manual

178
Determining the Error from the Current Situation for Communications Errors
Section 7-4
Note The baud rate and communications distance sometimes depend on the com-
munications partner.
Status Possible cause Countermeasure
The Smart Active Part (SAP)
does not communicate with
the EJ1.
Connection
or
Connection port
There is no power supply to the
EJ1.
Supply power from the EDU power
supply terminal.
The SAP is not compatible with
the EJ1.
Use an SAP for the EJ1.
The SAP is not for serial con-
nection.
Use an SAP for serial Programmable
Terminal connection.
The Serial Communications
Board (SCB)/Unit (SCU) and
the EJ1 communications set-
tings do not match.
Set the Serial Communications
Board’s or Unit’s baud rate the same
as the port B baud rate.
Hint:
The EJ1 baud rate is set under the Port B Communications
Baud Rate parameter.
• The available baud rate settings are 9.6 kbps (default),
19.2 kbps, 38.4 kbps, 57.6 kbps, and 115.2 kbps. (See note.)
• Set the other parameters the same as the Serial Communi-
cations Unit as well, i.e., data length (7), parity (even), and
stop bits (2).The values in parentheses are the default set-
tings.
Refer to the PT and PLC manuals for PT and PLC communi-
cations settings. See Related Manuals on page xiv.
Set the communications conditions for the Serial Communica-
tions Unit as follows:
• User/default settings: User settings
• Serial communications mode: Serial Gateway
• Data length: 7 (bit)
• Stop bits: 2 (bit)
•Parity: Even (bit)
• Baud rate: Set the same baud rate as the
EJ1.
Refer to the CX-Integrator Operation Manual (W445) for
details.
Note The Serial Communications Board (SCB)/Unit (SCU)
must be unit version 1.2 or later. Refer to Unit Versions
of CS/CJ-series Serial Communications Boards/Units in
the Serial Communications Board/Unit Operation Man-
ual (W336) for information on checking unit versions.
There is an HFU connected to
the EJ1.
Port B cannot be used for communi-
cations if an HFU is connected to the
EJ1.
Hint:
When Using HFUs
Connect to port A on the Serial Communications Unit.
The following restrictions apply:
• The HFU cannot be used at the same time as the EST2-2C-
MV3 CX-Thermo Support Software.
• The baud rate is fixed at 38.4 kbps.
If an HFU Is Not Required
Disconnect the HFU and restart the EJ1.
EJ1
(RS-485)
PLC
CS/CJ
SCB/SCU
NS-series
PLC
CS/CJ
SCB/SCU
NS-series
EJ1
(RS-485)
CJ1W-CIF11
RS-422A Converter
Connection
port
PT ---
PLC ---
SCU ---
EJ1
(EDU)
Port B

Omron EJ1 Specifications

General

Brand	Omron
Model	EJ1
Category	Temperature Controller
Language	English