YASKAWA SOLECTRIA XGI 1500 Series User manual

Commercial 1500VDC String Inverter
SOLECTRIA XGI™1500
Smart Grid Feature and Modbus Manual
Models: XGI 1500-125/125 XGI 1500-125/150
XGI 1500-150/166 XGI 1500-166/166

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Contents
Introduction............................................................................................................................................31
SunSpec Overview ................................................................................................................................31.1
Data Types ............................................................................................................................................31.2
Modbus Overview..................................................................................................................................42
Value, Scale Factor, and Units...............................................................................................................42.1
Read/Write.............................................................................................................................................42.2
XGI1500 Smart Grid Features................................................................................................................43
Power Limiting .......................................................................................................................................54
Power Factor Control.............................................................................................................................75
Reactive Power Control .........................................................................................................................96
Volt-Var Control ...................................................................................................................................117
Volt-Watt Control..................................................................................................................................148
Frequency-Watt Control.......................................................................................................................179
Voltage Ride Through..........................................................................................................................1910
Frequency Ride Through .....................................................................................................................2311
Ramp Rate Settings.............................................................................................................................2612
Power Enable/Disable..........................................................................................................................2813
Inverter Restart....................................................................................................................................3014

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Introduction1
This manual explains the SunSpec protocol using Modbus for SOLECTRIA XGI 1000 inverters. This does not
include the history of either SunSpec or Modbus or the details regarding the creation of the protocols. It is
expected that the person(s) reading this manual have a clear understanding of both SunSpec and Modbus.
SunSpec Overview1.1
SunSpec organizes all registers into defined groups called models. Each model begins with a header to identify
it and its length. Only the models listed in this document are supported by SOLECTRIA XGI 1000 inverters. See
Section 0 for the list of supported models.
Within each model, not all registers are supported. Unsupported registered are marked as “Reserved”. Only
use supported registers.
Data Types1.2
Several data types are used in this document.
acc32: An accumulated value that fills two registers. This is used for a value that increases over time.
bitfield16: Group of 16 individual bits that fills one register. This is used to select non-mutually
exclusive options, such as alarms.
bitfield32: Group of 32 individual bits that fills two registers. This is used to select non-mutually
exclusive options, such as alarms.
enum16: Enumerated type that fills one register. This is used to select mutually exclusive options, such
as the state of the inverter.
float32: Floating point number that fills two registers.
int16: Signed integer that fills one register.
string: Group of registers that are used to hold an alphanumeric value. Size depends on the string and
must be read for each string.
sunssf: SunSpec scale factor.
uint16: Unsigned integer that fills one register.
uint32: Unsigned integer that fills two registers.
uint64: Unsigned integer that fills four registers.

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Modbus Overview2
Registers can be read using Modbus function code three (3) and certain registers can be written with Modbus
function code six (6). When reading or writing to a group of registers, such as reading a string, make sure that
the read command starts at the lowest address of the group and is of the appropriate length size for the
group.
Value, Scale Factor, and Units2.1
Many registers use a scale factor to communicate the value as an integer. The scale factor and units explain
how the value is read. See Equation 2.1 as an example of how to interpret the result of reading Address 40075,
as shown in Table 2.1.
Table 2.1 - Example of Value, Scale Factor, and Units
Address
Size
Name
Value
Type
Units
Scale factor
R/W
Description
40075
1
AphC
-
uint16
A
A_SF
R
Phase C AC current
40076
1
A_SF
-1
uint16
-
-
R
Scale factor - AC current
Equation 2.1 - Example of Applying Value, Scale Factor, and Units
  󰇛󰇜  
Read/Write2.2
The R/W column determines whether a value is read-only (R), write-only (W), or read-write (RW). Only write
to W or RW registers.
XGI1500 Smart Grid Features3
The XGI1500 firmware provides several grid support features to help maintain grid stability and reliability.
These features can either be activated, deactivated or updated via web-based GUI or using software which
supports Modbus TCP/IP.

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Power Limiting4
This feature allows the inverter to reduce the output from what it could produce given available resources.
Power limiting request typically occurs because of transmission congestion or lack of transmission access. It
can also occur due to excess generation during low load periods.
The image below shows the default setting of Power Limiting. The default state of this feature is deactivated.
Example:
If the cutomer wants to enable this feature and run the inverter at 80% of rated power. The procedure via the
web-based GUI is shown below.
Write “ 80.0 ” to Power Limit
Click the little box on the top left corner of the configuration window to enable Power Limiting

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Click Save button to apply the settings to local inverter
The alternative method is to use software which supports Modbus TCP/IP. The register address is shown
below.
To implement the same setting, the procedure is shown below.
Write “ 800 “ to register 40295
Write “ 1 “ to register 40299

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Power Factor Control5
This feature allows inverter to control the power factor at the point of common coupling (PCC). This can
maintain the power quality and stability of the overall electrical system. A power factor adjustment gives the
utility greater flexibility to supply the power quality required by the loads.
The image below shows the default setting of the Power Factor Control. The default state of this feature is
deactivated.
Example:
If the cutomer wants to enable this feature and set the PF to +0.8. The procedure via the web-based GUI is
shown below.

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Write “ +0.8 ” to Power Factor
Click the little box on the top left corner of the configuration window to enable Power Factor
Click Save button to apply the setting to local inverter
The alternative method is to use software which supports Modbus TCP/IP. The register address is shown
below.
To implement the same setting, the procedure is shown below.
Write “ 80 “ to register 40300
Write “ 1 “ to register 40304

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Reactive Power Control6
The feature allows inverter to stabilize the grid by compensating the reactive power. The image below shows
the default setting of Reactive Power Control. The default state of this feature is deactivated.
Example:
If the cutomer wants to enable this feature and set the inverter to run at 60% of maximum reactive power
capability. The procedure via the web-based GUI is shown below.
Write “ -60 ” to Constant Var
Click the little box on the top left corner of the configuration window to enable Reactive Power Control
Click Save button to apply the settings to local inverter
The alternative method is to use software which supports Modbus TCP/IP. The register address is shown
below.

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To implement the same settings, the procedure is shown below.
Write “ -600 “ to register 40306
Write “ 1 “ to register 40312