SMA SI 3324 Installation - Manual (Page 76)

Commissioning SMA Technologie AG
Page 76 SI3324/4248-14:SE2406 Installation Guide
2. "Direct" Setting
If the system uses a generator that can be automatically started using a contact (two-
wire autostart generator directly connected to the Sunny Island 3324/4248), set this
parameter to the "Direct" setting. The closing of the GenRequest relay (see section
5.4.4 "Generator Start with a Single Contact" (Page 50) for detailed information)
provides the start command to the generator from the Sunny Island 3324/4248.
When the generator is no longer required, the start contact opens and the start
command is revoked.
Possible reasons for a generator start command are:
• A request by the battery management (low battery voltage)
• A request by the load-dependent generator management (to handle generator
peak loads)
• A request by the temperature-dependent generator management (to protect the
Sunny Island 3324/4248 against overload)
• Manual start of the generator by the user via setting the
"24-3 GenOperation" parameter to the value "Start" or "Run1h"
3. "GenMan" Setting
The "GenMan" setting must be used for all generators that require more than a single
contact for starting. In addition to setting the parameter, the generator must also be
integrated into the system using the (optional) GenMan device - SMA order number
'SI GenMan' . Information on installation and parameter settings can be found in the
GenMan handbook and also in section 10.2.4 "With GenMan" (Page 95) of this
installation manual.
The reasons for a generator request from the Sunny Island 3324/4248 are the same
as those listed under "Direct" with these two exceptions:
• The Sunny Island 3324/4248 will only connect the generator when the "GenRun"
signal from the GenMan unit is received indicating that the generator is ready.
• With this setting it is not absolutely necessary that the inverter itself has set the
"GenRequest" relay before it connects the generator. In normal operation, the
inverter will usually set the "GenRequest" relay to request the generator and then
connect the generator once the "GenRun" signal has been received from the
GenMan. The decisive signal for connecting the generator is however the
"GenRun" signal. This allows the generator to be manually started at the
GenMan.
Note that in this configuration the Sunny Island 3324/4248 will only connect
the generator when it requested the generator by closing the "GenRequest"
contact.
If you wish to start the generator manually, activate the generator using the
"24-3 GenOperation" parameter.