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.
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.
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.
Flashing green On line
Init solid green Link failed
On line, communicating
I-7242D DeviceNet/Modbus RTU Gateway User's Manual, July 2006, Version 1.1
Table 2-6 MS led conditions
Device has unrecoverable fault
Perform error recovery
Table 2-7 NS led conditions
DeviceNet is off line
The device has detected an error that
example, detected a duplicate node
address or network configuration error
DeviceNet is on communication
I-7242D user manual