SUNNY ISLAND 5048 - Technical Description - Wind & Sun Ltd.

SMA Solar Technology AG Connecting External Sources
GenMan
Generator request
If the generator is running after being externally started and a generator request occurs,
the GnReq signal is disabled until the generator is externally stopped again and the stop
time has expired.
If a GenMan (generator manager) is integrated into the system, it assumes direct control of the
generator. It is connected between the Sunny Island and the generator. The GenMan is responsible
for controlling the generator (warm up time, cooling off time and autostart).
The Sunny Island requests the generator from the GenMan via the GnReq signal and keeps the signal
active as long as the generator is required. The GenMan returns the GENRDY signal via DigIn when
the generator is ready for operation. Then the Sunny Island synchronizes and connects. If the
generator is no longer required, the Sunny Island disconnects itself and disables the GnReq signal.
The following figure shows the principle of starting the generator via the "GenMan" generator control:
A manual generator start at the GenMan is notified to the Sunny Island via the GENRDY signal.
The device synchronizes and connects.
If the generator is started manually and externally at the GenMan, the Sunny Island blocks the GnReq
signal:
• Manual stop and start at the Sunny Island are ignored.
• Internal requests (e.g. via battery state of charge) are ignored.
The generator was started manually using GenMan.
If the generator has been manually started at the GenMan, it must also be stopped there.
Technical Description SI5048-TB-TEN110340 111