display will show a device count for “Devices OK”, “New”, and “Failed”. These are as follows:
Devices OK
: The number of Modbus devices that are presently working, and have been configured.
New
: Devices that the Energy Monitoring Hub supports, and are working, but have not yet been given a
name.
Failed
: The number of Modbus devices that either stopped responding, or are not supported by the Energy
Monitoring Hub.
Note: selecting the Modbus status option from the Energy Monitoring Hub console does not cause the Energy Monitoring
Hub to search for new devices. The Energy Monitoring Hub checks for new devices in the background all the time, taking
about 2.5 minutes to complete each pass through all 255 possible addresses. The Modbus test console option simply
displays the number of devices the Energy Monitoring Hub presently knows about.
The Energy Monitoring Hub has a built in io module with 8 flex-I/O inputs. This module shows up in the Modbus listing as
device 250, and is counted in the number of devices OK or New. I.e., if you have 1 Energy Monitoring Hub A8812 with a
single Modbus power meter, the device count will be 2. (One for the meter, and one for the Energy Monitoring Hub on
board IO)
Upload Data Now: If the Energy Monitoring Hub is configured to upload data using HTTP/POST to a webserver/database
such as LEM, this option will cause the Energy Monitoring Hub to upload all stored data immediately. If the dialout option
is enabled, an outbound phone call will be initiated, and disconnected after the transfer is complete.
Reboot
: This option will reboot the Energy Monitoring Hub.
Shutdown
: This option will stop the data logging processes and secure the flash memory. When secured, the console will
state that the power may be disconnected. It is important to shut down the Energy Monitoring Hub cleanly prior to
disconnecting the power from the device.
The Energy Monitoring Hub has an advanced menu that can be used to perform system checks and clear all configuration
options to the default settings. To access the advanced menu, wait until the LCD shows “Energy Monitoring Hub Ready”
and press both the Menu and Select buttons at the same time. Hold both down together for about 10 seconds. When the
advanced menu is displayed, you may release the two buttons. The following is a tree display of the advanced menu.
[Advanced Menu]
Console on COM1 (RS485 port)
Check flash disk
Erase Log/Config
(previous menu)
The
Check Flash Disk
option will force the Energy Monitoring Hub to check the entire flash disk for file system integrity.
This will require you to reboot the Energy Monitoring Hub.
The
Enable Console
feature will provide a shell prompt on the serial port for remote diagnostics. This is intended to be
used by Leviton technical support only.
The
Reset Configuration
option will remove all the user settings, data, and passwords that have been configured and will
return the Energy Monitoring Hub to the factory default settings. This is mainly useful when reconfiguring an Energy
Monitoring Hub that has been used previously on a different job or project.
Log File Data
The Energy Monitoring Hub stores data from the Modbus devices in text (csv) log files. One log file is created for each
Modbus device on the system. On a daily basis, the log files are "rotated", that is the current log file is renamed and
compressed with gzip compression, and a new log file is started. This allows the Energy Monitoring Hub to make efficient
use of the flash memory. When the storage capacity is beyond 95% full, the oldest log file will be removed from the
system.
Log File Status
The Energy Monitoring Hub can display a list of log files in the "log file data/status" web configuration page. A bar graph
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