enphase Envoy Communications Gateway, Installation And Operation Manual

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Copyright 2011 Enphase Energy 141-00014 Rev 01
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Device Scan Control
The Controlled device scan differs from other Envoy device scans in that it allows
control over scan period, scanning method, and number of devices. When first
installed, the Envoy initiates a seven-day scan. This initial seven-day scan is the
only scan needed for most systems.
NOTE : At sites with more than 100 microinverters, we recommend specifying
the total number of devices to be discovered in order to speed up the
discovery process. See the following procedure for details.
A controlled scan should only be run as needed to detect new or previously
undetected microinverters. You may want to use this feature in instances where you
need to run a controlled device scan for a large site or for a site with
communications issues.
To run a controlled scan:
1. From the Admin menu, choose Device Scan Control .
2. Enter a Scan Duration in days:hours:minutes (e.g., 0:00:60 to indicate zero
days, zero hours, and 60 minutes). The scan duration will depend on many
factors, such as number of devices to be detected and quality of power line
communication. You may want to start with a one-hour scan and increase the
duration as needed.
3. Although optional, it is best practice to enter a value for Total Devices . Enter
a value in this field. The Envoy will stop scanning once it has detected the given
number of devices.
NOTE : The Total Devices option can be used in conjunction with the Priority
Duration option to help discover any last few microinverters at a large site.
4. Enter a Priority Duration (optional) in days:hours:minutes (e.g., 0:00:20 to
indicate zero days, zero hours, and 20 minutes). If you enter a value in this field,
the Envoy will make scanning its sole activity for the period specified.