SMA HM-20 User Manual

11 Device Administration
SMA Solar Technology AG
Operating manual 61HM-20-BE-en-19
4. If the forecast period is to be shortened from 48h to the current day, select Active under Shortened forecast
period
5. Click on [Save].
11.3.11 Configuring the External Current Transformer
☐ This setting is only possible under Extended configuration.
☐ If the integrated measuring unit of the SunnyHomeManager is connected directly, it can measure a maximum
current of 63A per phase. Current transformers must be used to measure currents >63A per phase (see
Section8.2.3, page25).
Procedure:
1. For the request External current transformer: click on Yes.
2. Enter the specified values of the current transformer (default setting: 1 each) in the fields Primary current: and
Secondary current:.
3. Click on [Save].
11.3.12 Changing the Meter Configuration
In the Meter configuration area the data are displayed that were entered during commissioning and registration of
the system (see Section9.1, page29)
☐ A change is only possible under Extended configuration.
Only adjust the meter configuration for changes that are absolutely necessary
This might be the case, for example, if the grid operator demands a faster reaction for the dynamic active power
limitation or for the zero feed-in (zero export). Contact your grid operator for information and observe the
applicable standards and SMA manufacturer declarations.
Procedure:
1. Select [Edit] on the tab for the device setting of the SunnyHomeManager.
2. In the Meter configuration area in the fields Supply and feed-in as well as PV power generation, select the
required feed-in and grid-supply meter as well as PV generation meter from the drop-down list.
3. Select the required measuring interval from the Measuring interval internal energy meter drop-down list. Do
not change the default 1000ms unless this is required by standards (see corresponding manufacturer
declarations and unit certificates).
Information: If the internal energy meter is not used as the meter, the measuring interval must be set directly on the
meter (e.g. an SMAEnergyMeter) used.
4. Enter the IP addresses of all devices (up to 3) that require this data (e.g. battery inverters, stand-alone inverters or
hybrid inverters) in the input fields under Direct meter communication only if communication problems occur.
Information: If an entry was made here, the meter telegram is no longer sent as a multicast telegram as before.
This might cause problems with third-party devices.
5. Click on [Save].
11.3.13 Configuring Modbus Interfaces
☐ With SunnyHomeManager, this setting is only possible under Complex configuration.
Each device that is to communicate with the SunnyHomeManager via a Modbus communication protocol must be
uniquely addressed.
On the tab Modbus configuration, you can store up to 4 different Modbus configurations with which the
SunnyHomeManager searches for connected devices. After a successful search, the detected devices appear on the
tab Overview new devices and can be added there.

SMA HM-20 Specifications

General

Brand	SMA
Model	HM-20
Category	Measuring Instruments
Language	English