Communication loss

ID: symptom:communication-loss
IRI: https://solarlattice.org/kb/symptom/communication-loss
Status: active
Also known as: Communication failure, CommErr, Loss of Megapack Communication, Loss of Meter Communication, MIA

Communication loss means a device stops exchanging data, either inside the inverter or between the inverter, meters, controllers and the monitoring system. For CommErr, first wait 5 minutes to see whether the alarm clears on its own. If it does not, switch the external AC disconnect off and back on to reboot. Contact post-sales service if the alarm is still there. At plant level, controller points flag lost communication with meters, battery units or the islanding controller. Monitoring platforms can raise alerts for local network failures on TCP and RS-485 devices. Set delays on communication alerts so that short dropouts do not cause false alarms. Also check the RS485 communication board and its cabling in the inverter wirebox.

<!-- review notes

sentence 4: support check: partial - Delays for transient issues are supported, but the passages never advise checking the RS485 board and cabling in the wirebox for communication loss; they only describe the board and interfaces. -->

Claims

`observed_as`

c1 drafted · lead Device communication MIA flag

Tesla system controller points flag loss of communication with a meter, the Megapack, aggregated meters or the islanding controller. The islanding controller flag is set after communication has been lost for more than 2 seconds, and a meter MIA clears only after communication has been restored for a configurable clear time.

Controls and Comms Manual CI v1.3 tbl=165.r6 h=86f0bcea1070
Controls and Communications Manual CI v1.5 tbl=186.r4 h=86f0bcea1070
MP Utility Controls and Communications Manual v1.7 tbl=15.r8 h=c534de89f579
Controls and Comms Manual CI v1.3 tbl=78.r1 h=0ab6d41070ff
Controls and Comms Manual CI v1.3 tbl=175.r1 h=dab9093e2063
Controls and Comms Manual CI v1.3 tbl=60.r12 h=e1fdd147a53e
Controls and Communications Manual CI v1.5 tbl=87.r7 h=7b29ae16c046

c2 drafted · lead Network communication alert

A monitoring-platform rule detects local network failures on devices connected by TCP and RS-485. Default communication alerts can include delays so that short, transient dropouts do not trigger notifications.

PowerTrackUserGuide RevA 1.25 tbl=11.r4 h=0b0e0447d7ec
PowerTrackUserGuide RevA 1.25 sec=h113 h=47b893f2dd69

Referenced by

ABB / FIMER PVS-60-TL W030 reports c3
CPS SCA36KTL CommErr reports c3
CPS SCA50-60KTL CommErr reports c3
Fronius Symo 420 reports c2
SMA SB-US-40 10252 reports c2
SMA SB-US-40 10284 reports c2
SMA SB-US-40 10286 reports c2
SMA SB-US-40 10341 reports c2
SMA SB-US-40 10345 reports c2
SMA SB-US-40 10346 reports c2
SMA SB-US-40 10347 reports c2
SMA SB-US-40 10348 reports c2
SMA SB-US-40 10349 reports c2
SMA SB-US-40 10350 reports c2
SMA SB-US-40 10351 reports c2
SMA SB-US-40 10352 reports c2
SMA SB-US-40 10353 reports c2
SMA SB-US-40 7619 reports c2
SMA SB-US-40 8708 reports c2
SMA SB-US-41 10249 reports c2
SMA SB-US-41 10252 reports c2
SMA SB-US-41 10284 reports c2
SMA SB-US-41 10286 reports c2
SMA SB-US-41 10341 reports c2
SMA SB-US-41 10345 reports c2
SMA SB-US-41 10346 reports c2
SMA SB-US-41 10347 reports c2
SMA SB-US-41 10348 reports c2
SMA SB-US-41 10349 reports c2
SMA SB-US-41 10350 reports c2
SMA SB-US-41 10351 reports c2
SMA SB-US-41 10352 reports c2
SMA SB-US-41 10353 reports c2
SMA SB-US-41 7619 reports c2
SMA SB-US-41 8708 reports c2
SMA SBSE-US-50 8104 reports c2
SMA SBSE-US-50 8708 reports c2
SMA SBSE-US-50 8709 reports c2
SMA SBSE-US-50 8710 reports c2
SMA SBSE-US-50 9308 reports c2
SMA PEAK3-US 10249 reports c2
SMA PEAK3-US 10252 reports c2
SMA PEAK3-US 7619 reports c2
SMA PEAK3-US 8101 reports c2
SMA PEAK3-US 8708 reports c2
SMA PEAK3-US 8709 reports c2
SMA PEAK3-US 8710 reports c2
SMA CORE1-US 10249 reports c4
SMA CORE1-US 10252 reports c4
SMA CORE1-US 10284 reports c2
SMA CORE1-US 10286 reports c4
SMA CORE1-US 7619 reports c4
SMA CORE1-US 8101 reports c2
SMA CORE1-US 8102 reports c2
SMA CORE1-US 8103 reports c2
SMA CORE1-US 8104 reports c2
SMA STP-TL-US 8101-8104 reports c2
SMA STP-TL-US 8708 reports c2
SMA STP-TL-US 8709 reports c2
SMA STP-TL-US 8710 reports c2
SMA STP-X-US 8708 reports c2
SMA STP-X-US 8709 reports c2
SMA STP-X-US 8710 reports c2
SMA SI-US F733 reports c3
SMA SI-US F754 reports c3
SMA SI-US W734 reports c3
SMA SI-US W735 reports c3
SMA SI-US W736 reports c3
SMA SI-US W857 reports c3
SMA SI-US W867 reports c3
SMA SI-US W877 reports c3
SMA SI-US W887 reports c3
Solis S6-EH2P CAN Fail reports c2
Solis S6-EH3P30-60K CAN Fail reports c3
Solis S6-EH3P75-150K CAN Fail reports c2
Solis S6-GC DRM LINK Fail reports c2
Solis S6-GU DRM LINK Fail reports c2
Sungrow SG200HX 514 reports c2
Sungrow SG200HX 75 reports c2
Sungrow SG250HX 514 reports c2
Sungrow SG250HX 75 reports c2
Sungrow SG350HX 514 reports c2
Sungrow SG350HX 75 reports c2
Yaskawa Solectria XGI-1500-1MW WARN-28 reports c3
Yaskawa Solectria XGI-1500-DCG WARN-28 reports c3
Yaskawa Solectria XGI-1500 WARN-28 reports c5
Automatic backup unit fault presents_as c9
Inverter-BMS communication fault presents_as c13
Communication bus wiring or termination fault presents_as c5
Daisy-chain communication break presents_as c1
Duplicate device bus address presents_as c1
Energy meter measurement or communication failure presents_as c8
Device firmware defect presents_as c2
Internal connector or ribbon cable unseated presents_as c5
MLPE gateway communication failure presents_as c10
Monitoring network configuration fault presents_as c7
Parallel inverter synchronization fault presents_as c11
Power line communication interference presents_as c5

Communication loss

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