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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.
