CEM+ Procedures 53
Verifying the Configuration of the New Control Module
For Single Rack Systems
Sensor+ racks contain a backplane memory chip that allows the CEM+ to detect upon boot if it holds
the correct configuration for the system. If the CEM+ was last booted with the same configuration, it
will finish booting with its local copy of the group configuration and begin responding to incoming
data. If CEM+ boots and its local configuration does not match the backplane, it will stop its boot and
display “CEM+ Not from Group” and offer options for further action as follows:
Use Rack's Configuration (default)
• CEM+ will get the configuration from the backplane, overwrite its local configuration and begin
to respond to incoming data according to the new configuration. This option may take up to 3
minutes to complete before responding to incoming data.
Get Configuration From
• CEM+ joins the group by reading group and rack and IP information from the backplane memory
chip and allowing user to choose to pull in the configuration from any of the online racks in the
group or an FTP server if one is available. Scroll through the options and press on the desired
rack. The CEM+ will then overwrite its configuration including group, rack, and IP address
information with that of the configuration being transferred and then begin to respond to data.
Go to no Configuration
• CEM+ face panel will switch to the no configuration menu assuming that you will overwrite the
configuration by creating a new one in the generate defaults menu. In the No Configuration
menu, you will again have a chance to transfer a configuration from another rack or you can
change rack, group and network information and begin a new configuration.
Use this CEMConfig
• This option tells the CEM+ that all of the other racks in the group contain the incorrect
configuration and gets ready to overwrite the configurations in the other racks in the
configuration with the configuration held locally in the replacement CEM+. The CEM+ confirms
that you indeed want to “Replace Group Configuration w/this CEMConfig [y]”. If you choose
Yes, then the CEM+ warns you again by asking “Send to all racks? Are you sure [Yes]”. Both
questions must be answered as yes for this option to take effect. If you have any doubts about
whether this option is correct for your situation, you should choose no. If you choose no, the
CEM+ will back you out to the main “No Configuration” menu.
WARNING:
If the configuration that is in the replacement CEM+ doesn’t match the actual
hardware in the group (number of racks, types of racks, module types and so
on) it will result in a unstable and possibly non-functional configuration. If
this happens, you will need to delete the configurations and begin a new
configuration.
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