Omron 3G3MV-PDRT2 User Manual page 223

Communications Errors
Indicator Display
Color Status
NS Green Lit
Flashing
Red Lit
Flashing
--- Not lit
Note For communications line problems, detailed error codes will be displayed on the indicators of
the Master Unit. Check the error code and take appropriate countermeasures according to the
descriptions in Chapter 9 Troubleshooting and Maintenance of CS/CJ Series DeviceNet Unit
Operation Manual (W380).
Meaning
The DeviceNet Network is operating
normally.
(Communications connections estab-
lished.)
The Network is normal, but the com-
munications connection with the
Master Unit is not established.
A fatal communications error has
occurred.
A DeviceNet communications error
was detected caused by node
address duplication or Bus OFF.
(These errors make communications
impossible.)
A non-fatal communications error has
occurred due to communications tim-
eout.
A DeviceNet Network error has
occurred. For example, the Network
does not exist, power is not supplied
to the Unit, or the baud rates do not
match.
Chapter 8
Countermeasures
---
Turn ON the power supply again after
the following steps.
• Register in the scan list.
• Set the connection path.
• Turn ON the power supply to the
Master Unit.
Turn ON the power supply again after
the following steps.
• Correct node address duplication.
• Connect termination resistance to
both ends of the communications
line.
• Correct communications line con-
nection problem.
• Correct the Master Unit errors that
occur when the Master Unit stops
after communications
established.
• Correct environmental conditions
such as noise.
Turn ON the power supply again after
the following processing.
• Connect termination resistance to
both ends of the communications
line.
• Correct defective connections in the
communications line.
• Correct environmental conditions
such as noise.
• Check the baud rate setting.
• Check the Option Unit connector
and turn ON the Inverter power
supply.
• Replace the Option Unit.
is once
8-3