Omron E5EK - MANUAL 2 User Manual page 129

8.1 Initial Checks
' 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 estab-
NS: Blinks green lished.
MS: Lights green A time-out has occurred in communications with the master, or the com-
NS: Blinks red munications 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 has
NS: Current status occurred.
When a communications data assignment error occurs, change the set-
tings using the keys on the front panel or a configurator.
The NS indicator indicates the current status, and is controlled normally.
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)