SMA SI 4548-US - Manual (Page 125)

SMA America, LLC 14 Connecting External Sources
Operating Manual SI4548-6048-US-BE-en-20 125
Generator Interface "234.07 GnSrtMod" = Autostart; Request Via Sunny Island
14.1.6 Limits and Power Control
The voltage limits can be set using the parameters "234.01 GnVtgMin" and "234.02 GnVtgMax"
and the frequency limits for generator operation can be set using the parameters "234.05 GnFrqMin"
and "234.06 GnFrqMax". If the values are outside these permitted limits, the generator is
disconnected. Slightly narrower limits apply to generator connection.
The voltage and frequency limits are monitored in phases. At least the phase on the master device
must comply with the limits defined for connecting the generator. If the limits are not maintained, slave
devices, where applicable, connect or disconnect individually.
1 Generator started by Sunny Island
2 Generator start
3 Beginning of warm-up time
4 Warm-up time has expired
5 Generator is connected
6 Current limit
7 Minimum running time is expired
8 Current is reduced, battery absorption phase
9 Charging process is completed, generator disconnection
10 Generator follow-up time expired, generator disconnection
11 Stop time has expired
Power-dependent generator start
Warm-up times, minimum run times and power-down times are also maintained for power
dependent generator starts.
System voltage (AC)
The system voltage (AC) depends on the generator voltage when the generator is running.
Generator disconnection by the master
If the master device disconnects the generator, all slave devices are disconnected as well.
Generator disconnection by a slave
If a slave device is disconnected from a generator (and the master continues to be connected
to the generator), the slave device can reconnect once the voltage and frequency are within the
valid range again.
In this case, a monitoring period is running. Only after the time for the parameter
"234.12 GnWarmTm" has expired and after voltage and frequency are determined to be valid
does reconnection take place.