Omron MX2 DEVICENET OPTION BOARD User Manual page 50

Troubleshooting Using the LED Indicators
Table 26 DeviceNet Errors
Display &
Indicators
The Option Board detects: communica-
tion idle or communication timeout during
RUN mode (P044).
MS NS
Network power failure.
MS NS
Critical link failure. The Option Board
detects too many communication errors.
(CAN bus off.)
MS NS
Connection time-out. The Option Board
detects communication lost.
MS NS
5-1-4 Commisioning Mode
!Caution
36
Possible Cause(s)
When using one of the OMRON tools during commissioning time, the
3G3AX-MX2-DRT-E can be set into commissioning mode. A clear indication
will be given by the tool.
Commissioning mode is NOT an error, but it can influence normal system
operation. During commissioning mode, Inverter parameter access takes pri-
ority over cyclic data exchange. Accessing Inverter parameters will therefore
delay cyclic data exchange causing unexpected latencies.
Make sure that commissioning mode is disabled before operating the system.
Corrective Action
Check (and correct) the following items:
Is the DeviceNet master sending IDLE messages? Check P048
to select the Action on Network Idle.
Increase the value of P044, the timeout value. (COS/Cyclic
connections require the P044 time-out to be set to a value
larger than the heart-beat timer).
Check (and correct) the following items:
Are the correct pins wired on the DeviceNet connector?
Are there any short circuits or line interruptions?
Is the correct power supplied (between 11 and 25V)?
Check (and correct) the following items:
Are the correct pins wired on the DeviceNet connector?
Are there any short circuits or line interruptions?
Is the ground cable of the option board connected with a
ground terminal of the MX2 Inverter?
Are the MX2 installation guidelines to comply with EMC recom-
mendations properly implemented (refer to MX2 User's manual
(Cat. No. I570) section D-1)?
Are you using the correct cable type?
If you have branches from the DeviceNet cable main line: Are
any of these branches too long?
Are the terminators mounted on both ends of the trunk only?
Is noise interference excessive?
Check (and correct) the following items:
Are the correct pins wired on the DeviceNet connector?
Are there any short circuits or line interruptions?
Section 5-1