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P O W E R I N G T E C H N O L O G Y
Manual No. sli-15-G-3a
sli15-userguide-rev3a-0718.indd
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3 Operating modes
The unit has two operating modes:
-
Stand Alone mode: there is only one inverter in the system
-
Parallel mode: there are several inverters working in parallel (max. number of parallelable units: 8)
The default mode is Stand-Alone.
Trained personnel should set the operating mode before the system starts supplying the load (see SERVICE
menu on "Appendix A").
It is possible but not recommended to change the operating mode while the inverter is operating.
ATTENTION:
incorrect unit setting may lead the system to latch up
Notes
When the unit work in Parallel mode it is not possible to change the following parameters in the
SETTINGS menu: Vout, Iout, Frequency. The access to these parameters is locked to avoid system
conflicts (see also Notes on page 8).
4 Controller status
When operating in Parallel mode the controller inside each unit can operate in two modes:
-
Master: provides the commands for the whole system of paralleled inverters. There is only one master.
-
Slave: it follows the commands of the Master
When working in Stand Alone mode the status of the unit is Master.
Controller statuses are assigned automatically and cannot be changed by the user. In case of failure of the
master in a parallel configuration a new master is selected automatically and control of the system of
paralleled inverters is transferred automatically to the new master.
