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V1.0 | NRG EtherNet/IP Preliminary User Manual | © 2020 | CARLO GAVAZZI LTD.
EN
8.
Service and Maintenance
8.1
Internal bus communication check
During the initially installation of the system, it may be useful to do a communications check before connecting the
NRG controller to the PLC. A communications check will ensure that all RG..Ns connected on the bus chain are
responding.
To perform a communications check, press the blue button on the facade of the NRG controller for 2
–
5 seconds.
The NRG controller will ping each device sequentially. All communicating RG..Ns on the NRG bus chain will have
their BUS LED flashing to indicate that communication was established,.
Figure 10 Press blue button for 2 - 5s to start / stop communications check
After finishing with the communications check it is important to turn it off by pressing again the blue button (2-5
secs) otherwise PLC cannot communicate with the NRG bus chain.
8.2
Replacing an RG..N
When an RG..N has to be replaced:
1)
Connect the new RG..N to the bus chain
2)
Perform an auto-addressing function as explained in Section 3.3 or via an acyclic command
3)
If the same RG..N variant is used as the previous one (same part number), start-up parameters will be sent
automatically upon start up of the PLC and communication should initiate.
4)
If a new part-number is used, the PLC will only intiate communication with the RG..N if the current rating of
the new device is higher, otherwise the RG..N will not be found on the communication interface.
5)
If step 2 is accidentally skipped, an Unconfigured error shall automatically be triggered which would
indicate that an auto-addressing is required.
Note
: RG..N replacements should be performed with the system turned OFF.
2
–
5s
