Omron E5EK DEVICENET User Manual page 132

CHAPTER 8 TROUBLESHOOTING
8.1 Initial Checks
F MS/NS Indicator
8--2
If trouble occurs, first check items (1) to (3). Correct any problems you
find according to the remedy described.
(1) Power supply
Make sure that the power supply is ON. Also, make sure that the
power supply is within the rated voltage range.
(2) Wiring
Make sure that all cables are properly connected.
(3) Communication conditions
• When CompoBus/D (DeviceNet) is in use, make sure that the
node addresses and baud rate conditions match, and that settings
are within the specified ranges.
Make sure that communication data assignment, communication
data format, operation at communication error, and remote/local
selection are correctly set.
If, as a result of checking or processing, the trouble is not remedied,
check the details, for example, on the error display.
When communications is being performed successfully, both the MS
and NS indicators light green.
The E5EK-DRT is equipped with a function for monitoring the commu-
nications power supply.
For this reason, the MS lights green and NS blinks red when the E5EK-
DRT power is being supplied with the communications power not being
supplied.
MS (Module Status) Indicates the status of the node itself.
NS (Network Status) Indicates the status of the network.
LED Lighting Specifications
LED Status
MS: Lights green In this state, the communications network and control are normal.
NS: Lights green
MS: Lights green In this state, the communications connection with the master is not
NS: Blinks green established.
MS: Lights green A time-out has occurred in communications with the master, or the
NS: Blinks red communications power supply may not be supplied.
MS: Lights green A duplicated node address error has occurred, or BusOff (communica-
NS: Lights red tions stopped by frequently occurring data errors) has been detected.
MS: Lights red Unrecoverable fatal error has occurred.
NS: Out If this trouble persists even after the E5EK-DRT has been turned OFF
and then ON again, repair is necessary.
MS: Blinks red A CompoBus/D (DeviceNet) communications data assignment error
NS: Current status has occurred.
When a communications data assignment error occurs, change the
settings using the keys on the front panel or a configurator.
The NS indicator indicates the current status, and is controlled nor-
mally.
MS: Out Power is not being supplied to the controller, or the controller is reset.
NS: Out The controller is not on-line.
Meaning (main error)