I-7242D user manual
I-7242D DeviceNet/Modbus RTU Gateway User’s Manual, July 2006, Version 1.1 17/124
2.4
DeviceNet Indicator LED
The I-7242D includes three single-color LED displays to indicate the
status of module, network and I/O device. They are MS LED (it is red), NS LED
(it is green), and IO LED (it is red). The Indicators assist maintenance
personnel in quickly identifying a problem unit. The LED test is to be performed
at power–up. When the DeviceNet communication events occur, these
indicators will be triggered to glitter with different conditions.
2.4.1 MS LED
This LED provides device status and indicates whether or not the device
is operating properly. Table 2-6 shows the conditions of MS status. Therefore,
when the device is operated normally, the MS-LED must be turned off.
Table 2-6 MS led conditions
Condition Status
Description
Red
Critical fault
Device has unrecoverable fault
Flashing
red Non-critical
fault
Device has recoverable fault; to
recover:
Reconfigure device
Reset device
Perform error recovery
2.4.2 NS LED
This LED indicates the status of the communication link for the device.
Table 2-7 shows the conditions of NS status. Therefore, when the device is
correctly communicating in the network, the NS-LED is normally turned on.
Table 2-7 NS led conditions
Condition Status
Description
Off
Off line
DeviceNet is off line
Flashing green On line
DeviceNet is on line, but not
communicating
Init solid green Link failed
The device has detected an error that
has rendered it incapable of
communicating on the link; for
example, detected a duplicate node
address or network configuration error
Solid green
On line, communicating
DeviceNet is on communication