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42 Micro Motion
®
Model 2400S Transmitters for DeviceNet
™
Using the Transmitter
7.4.2 Using the network LED
The behavior of the network LED is standard, and is defined by the DeviceNet protocol. Table 7-4
lists the different states of the network LED and defines each state.
7.5 Viewing transmitter status
You can view transmitter status using the status LED, ProLink II, or a DeviceNet tool. Depending on
the method chosen, different information is displayed.
7.5.1 Using the status LED
The status LED shows transmitter status as described in Table 7-5. Note that the status LED does not
report event status or alarm status for alarms with severity level set to Ignore (see Section 8.8).
Table 7-3 Module LED states, definitions, and recommendations
Module LED state Definition Recommendations
Off No power Check the connection to the DeviceNet network.
Solid green No processor faults No action required.
Flashing green Needs DeviceNet configuration;
may be in Standby state
Indicates an A006 alarm. Characterization
parameters are missing. See Section 6.2.
Solid red Non-recoverable fault Power cycle the transmitter. If condition does not
clear, call Micro Motion customer service.
Flashing red Recoverable fault Check for any status alarms.
Flashing red/green Device in self-test Wait until self-test is complete.
Check the Identity Object (0x01) for device states.
Table 7-4 Network LED states, definitions, and recommendations
Network LED state Definition Recommendations
Off Device not online The device is not connected to the network.
(1)
Check
the wiring if this LED is lit.
(1) If the transmitter is the only device on the network, and there is no host on the network, this is the expected LED state, and no action
is required.
Solid green Device online and connected No action required.
Flashing green Device online but not connected The device is connected to the network, but has not
been allocated by a host. No action required.
Solid red Critical link failure The most common cause is duplicate MAC IDs
(node addresses) on the network. Check for
duplicate MAC IDs.
Other causes include incorrect baud rate setting or
other network failure.
Flashing red Connection timeout Power cycle the device, or release and re-allocate
the device from the DeviceNet master.
If desired, increase the timeout value (Expected
Packet Rate) in the DeviceNet Object (0x03).
Flashing red/green Communication faulted state Not implemented in the Model 2400S DN transmitter.