Ideal Power Stabiliti Series User manual

Quick Start Guide
Stabiliti™ Series
30 kW Power Conversion System (PCS)
Model Numbers: 30C, 30C3
MAN-00114, Rev D

Page 2 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
Disclaimer
This document is provided “as is” and Ideal Power Inc. (IPWR) makes no representations
warranties, expressed or implied, with respect to the information contained herein. IPWR has
made reasonable efforts to ensure the accuracy of information herein and at the time of
publication. However information is constantly evolving and IPWR does not purport the
information provided is correct, comprehensive or exhaustive. This document is for informational
purposes only. You should not act upon information without consulting IPWR or its authorized
distributors.
© Copyright 2016, Ideal Power Inc. All rights reserved. No parts of this document may be
reproduced in any form without the express written permission of IPWR. Ideal Power Inc., and
the Ideal Power logo are trademarks of Ideal Power Inc. All other trademarks and service marks
belong to their respective owners.

Page 3 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
Table of Contents
SECTION 1.0 INTRODUCTION ...................................................................................................5
Purpose, Scope, and Audience...................................................................................................................5
SECTION 2.0 SYSTEM SPECIFICATIONS.................................................................................5
Hardware Description ................................................................................................................................5
Unpacking and Inspecting the PCS............................................................................................................6
Mounting the PCS......................................................................................................................................6
SECTION 3.0 LOW VOLTAGE WIRING......................................................................................6
Wiring Access............................................................................................................................................6
Interface Overview.....................................................................................................................................8
SECTION 4.0 HIGH-VOLTAGE WIRING...................................................................................11
Wiring Access..........................................................................................................................................11
AC1 Interconnect Board ..........................................................................................................................11
AC External Circuit Protection Disconnect……………………………………………………..………12
DC2/DC3 Interconnect Board..................................................................................................................12
DC2 and DC3 External Circuit Protection Disconnect………………..………………………..………13
SECTION 5.0 MODBUS INTERFACE .......................................................................................13
PCS Configuration, Control, and Monitoring..........................................................................................13
Application Specific Register Settings.....................................................................................................14
Modbus Register Assignments.................................................................................................................15
Scaling Factors.........................................................................................................................................18
Watchdog Timer.......................................................................................................................................20
SECTION 6.0 CONTROL METHODS........................................................................................20
AC1 Control Methods..............................................................................................................................20
DC2/DC3 .................................................................................................................................................20
Control Methods ......................................................................................................................................20
Control Method Uses and Restrictions ....................................................................................................20
SECTION 7.0 POWER FLOW SCENARIOS .............................................................................22
Initial System Configuration: Battery on DC2; PV Array on DC3 ........................................................22
Single Battery Power Exchange...............................................................................................................23
Dual Battery Power Exchange.................................................................................................................23
AC Microgrid –Using Single Battery .....................................................................................................23
AC Microgrid –Using Dual Batteries .....................................................................................................24
Solar + Storage Microgrid........................................................................................................................24
Solar + Storage Microgrid, with Genset Backup .....................................................................................24

Page 4 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
PV Firming / Demand Management........................................................................................................25
PV + Battery Sum to Grid........................................................................................................................26
Battery Charging from PV and/or Grid....................................................................................................26
SECTION 8.0 LABVIEW MODBUS TOOL ................................................................................27
Table of Figures
Figure 1: Control Board Low-Voltage Connectors ……………………………………………….…..……7
Figure 2: 30C3 AC1 Wiring Interconnection Board ………………………………………………………11
Figure 3: 30C3 DC2 and DC3 Wiring Interconnection Board……………………………………….…….12
Figure 4: AC1 and DC2/DC3 Interconnect Boards….……………….………………………………..…..27
Table of Tables
Table 1: AC1 Registers……………………………………………………….…………………………....15
Table 2: DC2/DC3 Registers……………………….…………………………………………….……..…16
Table 3: Other Pertinent Registers ……………………………………………….……………………..…17
Table 4: Register Scaling Factors …..…………………………………………………………………......19

Page 5 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
0
SECTION 1.0 INTRODUCTION
Purpose, Scope, and Audience
This Quick Start Guide describes the features and capabilities of the Stabiliti™ 30C3 Multiport
Power Conversion System (“PCS” or “Converter”), as well as the Stabiliti™ 30C Dual Port PCS.
It should be used in conjunction with other product documentation provided by Ideal Power
(“IPWR”), which are referenced throughout this Quick Start Guide.
The intended audience is engineering lab personnel familiar with high-voltage/high-power
systems and the general safety issues related to the wiring and use of 3-phase AC power and
high-voltage battery and PV systems.
The Stabiliti™Series Installation and Operations Manual (MAN-00115) should be used to
ensure safe installation and operation of this Converter. Please review this entire document
prior to starting your system evaluation. Contact [email protected] for technical support
as needed.
SECTION 2.0 SYSTEM SPECIFICATIONS
Hardware Description
The 30C3 PCS uses IPWR’s proprietary Power Packet Switching Architecture™(“PPSA”) to
efficiently transfer and manage power flows amoung three power ports: AC1, DC2, and DC3:
AC1 is a 3-Wire, 3-Phase AC power port.
DC2 is a DC power port typically dedicated to battery-based energy storage systems.
DC3 is an auxiliary DC power port for use with a second battery system, or a PV Array.
The 30C is a Dual Port PCS based on the 30C3 platform. The primary difference is that the Port
DC3 power electronics are depopulated and disabled at the factory. Other than the noted
depopulation of power electronics on DC3, the Stabiliti™Series PCS share a common
Firmware and Hardware platform.
The 30C has the following power port configuration:
AC1 is a 3-Wire, 3-Phase AC power port.
DC2 is a DC power port typically dedicated to battery-based energy storage systems.
The remainder of this document is dedicated to the 30C3, which can be configured to emulate
the 30C by setting port DC3 to the IDLE Control Method.

Page 6 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
Unlike previous PCS offerings from IPWR, the Stabiliti™Series PCS uses a novel Link
Transformer coupled with PPSA to deliver full galvanic isolation between the AC and DC power
ports. This isolation also delivers greater flexibility with regards to DC wiring options: floating;
grounded-unipolar; as well as bipolar battery types are all supported (minor wiring changes are
required to their DC power board connections).
All ports support bi-directional power flows (up to 30 kW max per port). Their highly flexible
operating modes are managed via Modbus RTU over an RS485 serial, control, and monitoring
interface. Modbus TCP is also supported. Future versions of the Stabiliti™Series PCS will
support wireless connectivity options.
Unpacking and Inspecting the PCS
The Stabiliti is pallet shipped, and is enclosed in a purpose-built heavy-duty cardboard box.
Once unpacked, inspect the PCS for any obvious shipping damage. Immediately contact your
shipper and Ideal Power regarding any damage noted.
Mounting the PCS
The PCS, when installed on its wall mounting bracket weighs approximately 135 pounds.
External dimensions are 20.5”W x 40”H x 16”D. The PCS MUST always be installed in a
vertical upright position, this includes testing and evaluation purposes. Do not block cooling
airflow to the bottom air intake filter or the exhaust output, which is located on the upper door
face of the unit. Complete the mounting and installation following instructions in the Stabiliti™
Series Installations and Operations Manual (MAN-00115).
SECTION 3.0 LOW VOLTAGE WIRING
Wiring Access
The PCS wiring compartments are accessed by three screws which open the full-sized (20.5” x
40”) hinged front door. All low-voltage wiring is directly terminated to connectors located on the
system’s Control Board, located on the upper left side of the enclosure.
Other than Ethernet and USB connections, low-voltage terminations are bare wire type.
Sourcing appropriate cables, conductors, and wiring are the customer’s responsibility.
Care should be taken when making up, routing, and connecting low-voltage cables. The
PCS should be disconnected from AC and DC power sources and a grounding strap
should be worn by the equipment installer. Refer to MAN-00115, Stabiliti™Series
Installation and Operations Manual for additional information regarding low-voltage
wiring.
In all Stabiliti™Series applications, an outside system controller is required to configure, control,
and monitor the PCS in real-time via the serial Modbus RTU, or Modbus TCP interface. These
energy storage systems may also utilize other low-voltage interfaces shown in Figure 1.

Page 7 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
Figure 1: Control Board Low-Voltage Connectors
Shown in Figure 1,
there are nine (9) low-voltage interfaces
on the Control Board. From top to
bottom in ascending order:
1. AC Disconnect (J8)
2. E-Stop / Aux 24 V In (J9)
3. RS485 (J10)
4. Sync/CAN (J11)
5. Transfer Switch (J16)
6. Ethernet (J7)
7. USB (J13)
8. Aux 24 V out (J15)
9. Arc Fault Interface (J12)

Page 8 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
Interface Overview
#1 - AC Disconnect
2-Pin Phoenix-style connector
Pin 1 is relay “in”
Pin 2 is relay “out”
This low-power relay driver output will open whenever the PCS senses a grid-fault condition.
It is intended to drive an external 24 Vdc relay which in turn drives an external AC
contactor/disconnect, to open the connection between the PCS and the grid. 2.5 A is the
maximum load current.
#2 - E-Stop / Aux 24 V In
4-Pin Phoenix-style connector
Pin 1 is Ground
Pin 2 is Emergency Stop
Pin 3 is Ground
Pin 4 is Auxiliary 24 V in
For normal PCS operation, the E-Stop input (pin 2) must be connected to ground. If left open or
tied to 24 Vdc, the E-Stop feature is activated and the PCS will cease exporting power and
move to an idle state. For voltage-forming applications, connect a 150 W 24 Vdc power supply
between Ground (pin 3) and Aux 24 V in (pin 4).
This external power supply is required to keep the control board awake when the PCS is black-
started in voltage-forming mode. The power supply also keeps the control board awake when
transitioning between voltage-following and voltage-forming modes.
For applications that support only voltage-following operation (grid-tied), the supply is not
required.
NOTE: For initial Modbus configuration and read/write verification, use of the external supply is
useful, otherwise a 480 Vac grid connection is required to power the Control Board.
#3 - RS485
3-Pin Phoenix-style connector
Pin 1 is RS485 D0 ( also known as A/A', positive half of differential pair)
Pin 2 is RS485 D1 ( also known as B/B', negative half of differential pair)
Pin 3 is isolated ground ( Common, also known as C/C', signal/power)
2-Wire Serial Modbus interface. Factory default: 240 / 19,000 / 8 / even / 2. The media layer
protocol uses 2-wire Modbus RTU. This protocol relies on RS485 differential signaling. The
need for external termination resistors is determined by a number of factors including Modbus

Page 9 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
run length, number of devices on the Modbus run, type of interconnection cable, and baud rate
selected.
A maximum of one terminating resistor should be used when the Modbus interface of multiple
units are daisy chained together and connected to one master Modbus device. The optional
120 ohm Modbus terminating resistor is frequently not necessary, and may in fact interfere with
proper communications operation under some circumstances. Shorter connections typically
perform quite well without a termination resistor.
#4 - Sync/CAN
8-Pin Phoenix-style connector
Pin 1 is CAN_L
Pin 2 is CAN_H
Pin 3 is CAN isolated ground
Pin 4 is Sync RX_N
Pin 5 is Sync RX_P
Pin 6 is Sync TX_N
Pin 7 is Sync TX_P
Pin 8 is Sync isolated ground
NOTE: The CAN interface is reserved for future use.
#5 - Transfer Switch
8-Pin Phoenix-style connector
J16 pin 1 Island (24 Vdc)
J16 pin 2 Island Return (24 Vdc Return)
J16 pin 3 Island Acknowledge Return (24 Vdc Return)
J16 pin 4 Island Acknowledge (24 Vdc)
To enable voltage-forming (islanded operation), both pin 2 and pin 3 on J16 must be connected
ground, or left open. Connect to 24 Vdc to ensure the system never attemps to island while the
Facility Power Control Method is enabled.
These inputs are designed to interface with external third-party Islanding Switchgear
which allows the PCS to move between grid-following and grid-forming modes in a
seamless, blinkfree fashion to support critical loads. Detailing the Islanding Switchgear
application is beyond the scope of this initial Quick Start Guide. If not using third-party
Islanding Switchgear, leave J16 pins open.
#6 - Ethernet
8-pin RJ45 Connector
Ethernet Services
The Stabiliti™Series PCS supports wired Ethernet connectivity. This Ethernet connectivity

Page 10 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
will eventually support a range of services at a particular Ethernet IP address, each service
accessed through one or more ports. Detailing all of these services is beyond the scope of
this preliminary Quick Start Guide.
NOTE: The 30C3 supports Modbus TCP on port 502, slave ID 255. Presently, two functions
are supported: Function 3, Read Holding Registers; and Function 6, Write Holding Register.
Determining the Ethernet IP Address.
Once the PCS boots, it will request an IP address via DHCP (Dynamic Host Configuration
Protocol). Once an IP address is assigned by the local network, the PCS will display the
assigned IP address on its front panel display. If no IP address is assigned (e.g. if DHCP is
not available), the PCS will display 0.0.0.0 for the IP address (no address assigned). The
prototype PCS does not, presently, provide for retry of DHCP, so a power cycle of the PCS
is required if the 0.0.0.0 IP address is shown on the display. To ensure correct address
assignment, connect the network to the PCS prior to applying power to the unit’s Control
Board.
NOTE: Static IP addresses are not supported. DHCP address assignment by the local network
is required. If DHCP is not available, communicate with the PCS via Modbus RTU.
FTP (File Transfer Protocol)
Ideal Power use only. Supports remote file transfers to/from the PCS. This provides support
for collection of data and fault logs, and also for remote firmware updates. FTP uses ports
20 and 21.
Telnet
Ideal Power use only. Supports interactive application development, diagnostic
troubleshooting, and factory configuration. Telnet uses port 23.
#7 –USB Connector
Standard Mini-B USB connector.
NOTE: Not for customer use.
#8 - Aux 24 V Out
8-Pin Phoenix-style connector
Pin 1 is Isolated 24 V return (ground)
Pin 2 is Aux 24 V out
NOTE: Not for customer use.
#9 - Arc Fault Interface
8-Pin Phoenix-style connector.

Page 11 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
NOTE: Not for customer use.
SECTION 4.0 HIGH-VOLTAGE WIRING
Before connecting AC and DC power sources, it is recommended that the user first operate the
PCS with only the Aux 24 Vdc power supply connected. Doing so enables access to the Control
Board and the various configuration, control, and monitoring features supported by the
Stabiliti™Series PCS and detailed later in this document.
Wiring Access
IPWR recommends that all product evaluations begin with a low-voltage systems analysis first
as described in the paragraph above. Once the systems analysis is completed, connect AC and
DC power sources. The Converter wiring compartments are accessed by eight hex screws
which open the full-sized (20.5” x 40”) hinged front door.
High-voltage AC1 connection points are located on the left bottom section of the
Converter enclosure.
High-voltage DC2 and DC3 connections are located on the right bottom section of the
Converter’s enclosure.
NOTE: Do not disturb or change the factory wiring connections, which are made to the top of
the AC1 Interconnect Board, and the DC2/DC3 Interconnect Board shown below..
AC1 Interconnect Board
Figure 2: 30C3 AC1 Wiring Interconnect Board

Page 12 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
The bi-directional AC1 port shown in Figure 2 is configured as a 3-wire delta interface. Factory
defaults are set to support North American grid standards: operating frequency is 60 Hz; operating
voltage is 480 Vac. Detailing 50 Hz operation is beyond the scope of this document.
AC Connections are made to the bottom terminals designated as PHASE A, PHASE B, and
PHASE C. Note that the PCS will automatically adapt to phase rotation.
An earth grounding lug shown in the image is located just below the Phase A connector.
Ensure that the chassis/enclosure is correctly grounded by utilizing this connector for earth
ground. Contact [email protected] regarding any questions you may have regarding
available AC voltage and frequency options.
AC External Circuit Protection and Disconnect
The Stabiliti™ must be installed with external circuit protection. A 50 A 3-Phase 3-wire AC
breaker, rated at 480 Vac, is commonly used for such purposes. In some jurisdictions, this
circuit breaker may also be approved for use as a safety disconnect. However, Ideal Power
recommends that you confirm specific AC disconnect requirements with your local Authority
Having Jurisdiction (“AHJ”). Some utilities may require an external “red-handle” lockable
disconnect, in additional to the protection breaker.
DC2/DC3 Interconnect Board
Figure 3: 30C3 DC2 and DC3 Wiring Interconnect Board

Page 13 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
The DC Wiring Interconnect Board shown in Figure 3 reflects a 30C3 PCS with DC3 components
installed. The battery positive is connected to DC2 (T7) and the battery negative to the right most
DC COM (T8).
Typically, an external PV arraynegative connection is made to the bottom and left-most DC COM
(T9) and positive PV array connection to DC3 (T10). Note that the battery and PV Array
connections share a common negative connection: DC COM. They are NOT isolated from one-
another.
There are numerous DC wiring options available on the 30C3, including support for floating,
grounded unipolar and bipolar battery configurations. Refer to Stabiliti™ Series Installations and
Operations Manual (MAN-00115) to determine what configurations best fits your application.
Contact [email protected] for questionsregarding DC2 and/or DC3 wiring options.
DC2 and DC3 External Circuit Protection and Disconnect
The 30C (DC2 only) and 30C3 (DC2 and DC3) must be installed with external fused circuit
protection on their DC power ports. A 1000 Vdc rated, 100 A fused PV Disconnect is commonly
used for such purposes. However, Ideal Power recommends that you confirm specific DC
disconnect and safety requirements with your local Authority Having Jurisdiction (“AHJ”).
SECTION 5.0 MODBUS INTERFACE
PCS Configuration, Control, and Monitoring
All Stabiliti™ Series Converters are configured, monitored, and controlled via the Modbus RTU
or Modbus TCP Interfaces. The interface consists of a series of signed or unsigned 16-bit
registers, each with its own unique hexadecimal Modbus address.
Several of these registers are read-only that present static values such as model number and
serial number. Other read-only registers are dynamically updated presenting system status,
alarm conditions, port voltage, current, and power levels. The remaining registers control
system configuration, modes of operation, output power levels, and other parameters of the
Converter. These registers are both readable and writable.
Before applying AC or DC Power to the unit, IPWR highly recommends that parties responsible
for initial evaluation first familiarize themselves with the Modbus interface while supplying only
24 Vdc to the Converter’s aux power input.

Page 14 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
Application Specific Register Settings
The Modbus interface is used to establish minimum and maximum allowable DC2 and DC3
(30C3 model only)port voltages, port soft-power limits, PV-start and PV-stop times, non
standard AC over/under voltage limits, non standard AC over/under frequency limits, and other
key system parameters.
For example, DC3 maximum voltage (default = 1000 Vdc) should be updated from the factory
default and saved to flash to reflect your PV Array operating voltage range (30C3 only). DC2
minimum should be set from its factory default of 200; to -20 Vdc. This will eliminate nuisance
under-voltage faults from occurring. A separate register “p2_min_v_setpt1” should be
programmed to reflect the desired PV Array minimum starting voltage.
DC2 minimum voltage (default = 100 Vdc) and DC2 maximum voltage (default = 1000 Vdc)
should be updated from the factory default to reflect your battery voltage operating range (30c
and 30C3).
Once changed from factory defaults, your application-specific configuration options are not
automatically updated and saved to flash. IPWR suggests that they be saved to flash using
Converter’s internal memory to ensure that your revised defaults remain intact if power is lost.
Other registers, such as those dedicated to port Control Methods and their related setpoints will
be dynamically controlled by your external system controller. These registers should NEVER be
saved to flash. This ensures that if AC power is disrupted, or a hard system reset occurs, the
Converter will safely revert to its default IDLE operating state, ensuring no unplanned power
transfer occur.
The Stabiliti™ Series PCS factory defaults support the North American grid interconnection
standard of 60 Hz, 480 Vac, 3-phase. The physical connection is 3-wire Delta.
The Converter’s default AC over/under voltage limits, AC over/under frequency limits, AC Surge,
and fault reconnect timers all comply with applicable UL 1741 and IEEE 1547a standards. To
retain full compliance with these grid safety standards, these registers SHOULD NOT be
updated, without the review and approval of the local utility responsible for approving your grid
interconnection.
All Converters are shipped from Ideal Power have AC1, DC2, and DC3 set to the IDLE Control
Method (ports asleep), for safety purposes. They cannot transfer power until configured and/or
commanded to do so via the Modbus RTU or Modbus TCP interface. Such configurations are
detailed later in this document.
For ease of presentation in this document, register addresses shown below are in decimal.

Page 15 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
All register addresses must be converted to their hexadecimal equivalent by your system
controller. Also note that the Control Method register utilizes a hexadecimal data format “0x….”,
where 0x0000 indicates the Port Control Method is IDLE, as defined in Table 1.
Modbus Register Assignments
Table 1: AC1 Registers
Addr
Register Name
Format
Factory
Default
Comments
64
p1_port_type
uint16x
R/W
0x0103
0x0103 –AC1 DELTA 3-Wire
65
p1_control_method
uint16x
R/W
0x0000
0x0000 - IDLE
0x0001 - NET
0x0402 - GRID POWER (GPWR)
0x0502 –FACILITY POWER (FPWR)
66
p1_ramp_rate
int16
R/W
500
If p1_control_method = 0x0402 or 0x502:
real power and reactive power ramp rate
while voltage-following
67
p1_throttle_port
int16x
R/W
0x0000
If p1_control_method = 0x0001: throttle
port DC3 = 0; throttle port DC2 = 1
68
p1_real_pwr_setpt
uint16
R/W
0
If p1_control_method = 0x0402 or 0x502:
real power setpoint while voltage-following
69
p1_reactive_pwr_set
pt
uint16
R/W
0
If p1_control_method = 0x0402 or 0x502:
reactive power setpoint while voltage-
following
70
p1_power_factor_set
pt
uint16
R/W
0
If p1_control_method = 0x0001: power
factor setpoint, otherwise unused –need
to define scaling factor
71
p1_voltage_setpt
int16
RW
0
If p1_control_method = 0x502: line-to-
neutral voltage setpoint for voltage-
forming mode, otherwise unused
72
p1_frequency_setpt
int16
RW
0
If p1_control_method = 0x502: output
frequency setpoint for voltage-forming
mode, otherwise unused
74
p1_reactive_disable
int16x
RW
0x0000
If p1_control_method = 0x0001 (NET): 1
= automatic power factor correction is
disabled, defaut is enabled
89
p1_apparent_power_
limit
uint16
RW
3200
Soft VA Limit (port maximum is 32 kVA)
90
p1_current_limit
int16
RW
4400
Soft Current Limit (port maximum is 44 A)
96
p1_port_status
int16x
RO
b0 = 1: AC1 power limiting
b1 = 1: AC1 current limiting
b2 = 1: Throttling DC2
b3 = 1: Throttling DC3

Page 16 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
109
p1_v_ab_rms
int16
RO
AC1 A-B RMS voltage
110
p1_v_bc_rms
int16
RO
AC1 B-C RMS voltage
111
p1_v_ca_rms
int16
RO
AC1 C-A RMS voltage
115
p1_i_a_ext_adc
int16
RO
AC1 phase A RMS current
116
p1_i_b_ext_adc
int16
RO
AC1 phase B RMS current
117
p1_i_c_ext_adc
int16
RO
AC1 phase C RMS current
118
p1_power_factor
int16
RO
AC1 power factor
119
p1_real_power
int16
RO
AC1 real power
120
p1_reactive_power
int16
RO
AC1 reactive power
121
p1_apparent_power
int16
RO
AC1 apparent power
Table 2: DC2/DC3 Registers
Addr
Register Name
Format
Factory
Default
Comments
128
/192
p2/p3_port_type
uint16x
R/W
0x0002
DC port
129
/193
p2/3_control_method
uint16x
R/W
0
0x0000 - IDLE
0x0001 - NET
0x0002 - MPPT
0x0301 - DC CURRENT
0x0401 - DC POWER
130
/194
p2/p3_ramp_rate
uint16
R/W
50
IDLE –not applicable
NET –not applicable
DC CURRENT –factory default current
ramp rate = 5 A per second
DC POWER –factory default power ramp
rate = 500 W per second
131
/195
p2/p3_throttle_port_
setpt
int16x
R/W
0x0000
If p2 or p3_control_method = 0x0001:
throttle port AC1 = 0; throttle port DC3 (or
DC2) = 1
132
/196
p2/p3_current_setpt
int16
R/W
0
If p2/p3_control_method = 0x0301: DC
Current setpoint
133
/197
p2/p3_power_setpt
int16
R/W
0
If p2/p3_control_method = 0x0401: DC
Power setpoint

Page 17 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
135
/199
p2/p3_pv_start_tod_
setpt
uint16
R/W
0
If p2 or p3_control_method = 0x0002:
PV/MPPT start time in minutes from
midnight (1 to 1440)
136
/200
p2/p3_pv_stop_tod_
setpt
uint16
R/W
0
If p2 or p3_control_method = 0x0002:
PV/MPPT stop time in minutes from
midnight (1 to 1440)
138
/202
p2/p3_pv_min_v_
setpt
uint16
RW
100
If p2 or p3_control_method = 0x0002: PV
Array Voc must exceed this minimum DC
voltage to enable MPPT morning start
141
/205
p2/p3_v_pn_max_
limit
int16
RW
1000
maximum port DC operating voltage –for
safety, lower to expected battery or PV
Vdc maximum
142
/206
p2_v_pn_min_limit
int16
RW
200
minimum port operating voltage –for
safety, set to expected battery Vdc
minimum on battery port; set to -20 Vdc to
eliminate nuisance under-voltage faults
for port configured to support PV
153
/217
p2/p3_power_limit
uint16
RW
3200
DC2/DC3 Soft Power Limit (maximum 32
kW)
154
/218
p2/p3_current_limit
uint16
RW
600
DC2/DC3 Soft Current Limit (maximum
60 A)
160
/224
p2/3_port_status
int16x
RO
b0 = 1: DC2/DC3 power limiting
b1 = 1: DC2/DC3 current limiting
b2 = 1: Throttling AC1
b3 = 1: Throttling DC3/DC2
173
/237
p2/3_v_pn
int16
RO
DC2/3 voltage, positive to negative
(common)
176
/240
p2/3_v_pg
int16
RO
DC2/3 voltage, positive to ground (earth)
177
/241
p2/3_v_ng
int16
RO
DC2/3 voltage, negative to ground (earth)
185
/249
p2/3_power
int16
RO
DC2/3 power
186
/250
p2/3_current
int16
RO
DC2/3 current
Table 3: Other Pertinent Registers
Addr
Register Name
Format
Factory
Default
Comments
258
reconnect_timer_set_
0
uint16
R/W
320
Reconnect timer_2 setpoint (320
seconds)
263
user_start
uint16x
R/W
0
Manual mode start, set to 1 to start
264
user_stop
uint16x
0
Manual mode stop, set to 1 to stop

Page 18 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
R/W
266
remote_reset
uint16x
R/W
0x0000
Set b15 =1 to reset converter
267
sys_op_mode
uint16x
R/W
0x0000
0 = operate in manual mode; 1 =
automatic mode
296
firmware_version
uint16
RO
Major build FW version (8-bit)
297
build_version
uint16
RO
Incremental build FW version (16-bit)
298
system_status
uint16x
R0
b0 = 1 = self-test mode
b1 = 1 = RTO countdown
b2 = 1 = RT1 countdown
b3 = 1 = RT2 countdown
b4 = 1 = RT3 countdown
b5 = 1 = product not verified
b6 = 1 = lockdown active
b7 = 1 = link A starting
b8 = 1 = link B starting
b9 = 1 = link A exporting
b10 = 1 = link B exporting
? = abort active (need to define)
0 to
63
Fault Management
various
various
The use of fault monitoring and
management registers is detailed in a
separate Applications Note.
576 to
703
IEEE 1547a over/under voltage and
over/under frequency setpoint registers
All of the registers’decimal addresses noted above are exposed to the user via the Modbus
RTU or TCP interface and must be converted to hexadecimal by your system controller.
Additional registers are reserved for future support of SunSpec (www.sunspec.org) Smart
Inverter features, starting at address 40000.
NOTE: This document details only the pertinent registers of interest for initial evaluation.
Request the “IPC_Modbus_Register.xls” for the complete Modbus register list and data format
by contacting [email protected].
Scaling Factors
To represent values in logical Engineering Units, a scaling factor is utilized for many of the
Modbus registers noted above. This has been done to limit the values written to and read from

Page 19 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
the Converter within the 16-bit range of 0-65535 for unsigned and -32768 to 32767 for signed
values.
These scaling factors apply to read only “measurement registers”, as well as read/write “setpoint
registers” used to set desired output voltage, current, or power levels. The setpoint registers are
generally not utilized in 30C stand-alone applications.
Table 4: Register Scaling Factors
In 30C3 applications, a DC power command of +1500 on DC3 will deliver 15 kW of “export
power” (charging a battery). Conversely, a DC power command of -1000 on DC3 will deliver 10
kW of “import power” (discharging a battery).
The ramp rate command is a modifier of the power command defined above. It limits the port
ramp rate (power, current, or voltage depending on selected Control Method). A power ramp
rate setting of 300 limits the ramp up or ramp down of the commanded port to a 3 kW/second
rate.
Type
Scaling Factor
Register
Read/Write
Actual Value
AC / DC Port
Voltage
1 unit = 1.0 V
100
100 Vac / 100 Vdc
DC Port Current
1 unit = 0.1 A
100
10.0 A
DC Port Power
1 unit = 10 W
100
1000 W
AC Port Real
Power
1 unit = 10 W
100
1000 W
AC Port Reactive
Power
1 unit = 10 Var
100
1000 Var (1 kVar)
AC Port Voltage
Ramp Rate
1 unit = Volts per
second
100
100 V/second
DC Port Current
Ramp Rate
1 unit = 0.1 A per
second
100
10 A/second
AC/DC Port Power
Ramp Rate
1 unit = 10 W per
second
100
1000 W/second
Frequency
1 unit = 0.001 Hz
6000
60 Hz

Page 20 of 28
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
Watchdog Timer
IPWR recommends that our watchdog timer function be utilized in all production Converters
deployed by your Company. This ensures that if a system controller fault occurs, or a
communications failure occurs between your system controller and the Converter, the system
will idle itself after watchdog countdown. After a user writes an update to the watchdog timer
register, the timer will count down and upon reaching zero the Converter will be automatically
set to an idle state. The Converter is shipped with the watchdog feature disabled.
SECTION 6.0 CONTROL METHODS
Via the Modbus RTU or Modbus TCP interface, there are numerous and flexible means to
transfer power amoung Converter power ports. These port-specific operating modes are
collectively known as “Control Methods” and include MPPT, GRID POWER (GPWR), FACILITY
POWER (FPWR), DC Power (PWR), DC CURRENT (DCA), NET, and IDLE. There is a
dedicated Control Method register for each port of your PCS.
Each Control Method may also have one or two associated setpoint registers (target output
power, output current, and/or output voltage), as well as a separate ramp rate register which
specifies how fast to move from an existing output power or current level to a new setpoint
target. The programmable ramp rate allows the PCS to smoothly ramp up or ramp down port
power over a programmable time period ranging from tens of milliseconds to minutes.
The Control Methods supported in the Stabiliti™ Series PCS are listed below.
AC1 Control Methods
IDLE (0x0000) –factory default
NET (0x0001) –grid-tied applications only
GPWR (0x0402) –grid-tied applications only
FPWR (0x0502) –interactive voltage-following/voltage-forming applications (requires
external islanding switchgear or voltage-forming applications)
DC2/DC3 Control Methods
IDLE (0x0000) –factory default
NET (0x0001)
MPPT (0x0002)
DCA (0x0301)
DC POWER (0x0401)
Control Method Uses and Restrictions
IDLE Control Method (0x0000)
If a port is not in use, it should be set to the IDLE Control Method. All Converters are shipped
with IDLE as their factory default for safety purposes.