Circutor CDP series Supplement

Connection and configuration of a
CDP with DELTA RPI inverters
APPLICATION NOTES
(M028E0901-03-15A)

CDP
2Application notes

CDP
Application notes 3
SAFETY PRECAUTIONS
Follow the warnings described in this manual with the symbols shown below.
DANGER
Warns of a risk, which could result in personal injury or material damage.
ATTENTION
Indicates that special attention should be paid to a specific point.
If you must handle the unit for its installation, start-up or maintenance, the follow-
ing should be taken into consideration:
Incorrect handling or installation of the unit may result in injury to personnel as well
as damage to the unit. In particular, handling with voltage applied may result in elec-
tric shock, which may cause death or serious injury to personnel. Defective installa-
tion or maintenance may also lead to the risk of fire.
Carefully read the manual prior to connecting the unit. Follow all installation and
maintenance instructions throughout the unit's working life. Pay special attention to
the installation standards of the National Electrical Code.
Consult the instruction manual before using the unit
In this manual, if the instructions marked with this symbol are not respected or fol-
lowed correctly, it can result in injury or damage to the unit and /or installations.
CIRCUTOR, SA reserves the right to modify features or the product manual without prior notification.
DISCLAIMER
CIRCUTOR, SA reserves the right to make modifications to the device or the
unit specifications set out in this instruction manual without prior notice.
CIRCUTOR, SA, on its web site, supplies its customers with the latest versions
of the device specifications and the most updated manuals.
www.circutor.com

CDP
4Application notes
CONTENTS
SAFETY PRECAUTIONS.................................................................................................................... 3
DISCLAIMER........................................................................................................................................ 3
CONTENTS .......................................................................................................................................... 4
LOG OF REVISIONS........................................................................................................................... 5
1.- INTRODUCTION............................................................................................................................. 6
2.- DELTA PRI M8A 8KW INVERTER................................................................................................ 6
2.1.-COMMUNICATION CABLE..........................................................................................................6
2.1.1. CONNECTION OF ONE INVERTER...................................................................................7
2.1.2. CONNECTION OF SEVERAL INVERTERS.......................................................................7
2.2.-INVERTER COMMUNICATION CONFIGURATION.................................................................8
3.- CDP CONFIGURATION................................................................................................................. 9
4.- COMMUNICATIONS TEST AND REGULATION....................................................................... 11
4.1.-COMMUNICATIONS TEST ........................................................................................................11
4.2.-REGULATION TEST....................................................................................................................12
5.- MAINTENANCE AND TECHNICAL SERVICE .......................................................................... 13
6.- GUARANTEE................................................................................................................................ 13

CDP
Application notes 5
LOG OF REVISIONS
Table 1: Log of revisions.
Date
Revision
Description
08/15
M028E0901-03-15A
Original version
Note: The images of the units are solely for the purpose of illustration and may differ
from the original unit.

CDP
6Application notes
1.- INTRODUCTION
DELTA offers several inverter models that can be managed via the CDP
Dynamic power controller.
For the CDP controller to be able to correctly manage the inverter,
communication between the two devices must be correct and both products
must be correctly programmed.
These application notes are not meant as a substitute for the CDP
or
inverter manuals, but rather as additional support for individuals who
need to interconnect the two devices.
Even so, the guides and manuals of each product should be consulted and each
company is responsible for providing technical support.
An inverter from the PRI family of inverters will be used as a model in these
application notes.
2.- DELTA PRI M8A 8kW INVERTER
The CDP and the inverter communicate via an RS-485 bus. This RS-485 bus
can connect up to 100 inverters, although the number of inverters in the vast
majority of domestic installations ranges from 1 to 3.
2.1.- COMMUNICATION CABLE
Functions of the communication cable terminals between the CDP and the
inverter:
Table 2: Functions of the communication cable terminals.
CDP
R2 channel communications
connector
INVERTER
Inverter ComCard
connector
Terminal
Description
Terminal
Description
1
A+
3
DATA +
3
B-
4
DATA -

CDP
Application notes 7
The cable must be connected to the RS-485 port of the inverter, Figure 1.
Figure 1: Description of the inverter terminals.
2.1.1. CONNECTION OF ONE INVERTER
Figure 2 shows the connection between the CDP and a single inverter.
Figure 2: Connection between a CDP and one inverter.
2.1.2. CONNECTION OF SEVERAL INVERTERS
Figure 3 shows the connection between the CDP and several inverters.
Figure 3: Connection between a CDP and several inverters.

CDP
8Application notes
The bus end terminal must always be connected to the last inverter of the RS-
485 communication bus.
The bus end terminal is a resistor that is built in the communications card of the
inverter. To activate it, the switch must be configured in the ON position.
Figure 4: Bus end terminal.
2.2.- INVERTER COMMUNICATION CONFIGURATION
The following describes how to use the display to configure the inverter for
ensuring correct communication with the CDP.
The AC and DC sides of the inverter must be connected to the mains before
it can turn on.
Consult the inverter manual if you have any doubts.
The configuration of the DELTA inverter parameters is done using the 4 buttons
on the front panel of the unit. (Figure 5)
Figure 5: DELTA inverter keyboard.
The parameters to be configured are:
Peripheral number ( Inverter ID), By default, this parameter has the value
01. If you have several investors have to change the numbers of periph-
eral to be different from each other.
In exceptional circumstances, if there are single-phase inverters in three-
phase installations, they must be numbered as shown in Table 3:

CDP
Application notes 9
Table 3: Peripheral number in three-phase installations with single-phase
inverters.
Peripheral number
Inverter L1
Inverter L2
Inverter L3
1 to 84
85 to 168
169 to 254
Insulation
Country and regulation comply
AC Connection
All parameters are in the same setup menu Inverter: Install settings.
To enter the Install settings menu must enter a password: 5555
Consult the manual for more information on how to configure the parameters.
3.- CDP CONFIGURATION
There is a configuration web site for the CDP where all the parameters of the
connected inverter have to be entered.
To do so, enter "/setup" at the end of the navigation bar where the CDP is
monitoring so that the following, for example, appears in the navigation bar:
“10.0.110.212/setup”
Next, the CDP configuration window will open (Figure 6).
Figure 6: CDP configuration web site.

CDP
10 Application notes
The most important inverter parameters that have to be configured in the CDP are
(Table 4):
Table 4: Parameters to be configured in the CDP.
Parameter
Description
Inverter type Inverter model. In this case select: DELTA
Inverter power
Total power to be controlled by the CDP.
Number of inverters
Number of inverters to control.
Phase
Architecture of the inverter connections
Consult the manual for more information on how to configure
the CDP.
When working with several three-phase inverters in cascade, the sum of the
power of all the inverters must be programmed in the Inverter Power variable in
the CDP so that the same regulation percentage is sent to each one.
When working with single-phase inverters in three-phase installations, the total
power of all the inverters must be programmed by selecting the "three single
phases" option in the "Phase" variable, and then entering the number of sets of
three single-phase inverters in the installation in the "Number of inverters"
variable.
Example: If there are six 2 kW single-phase inverters (two on the L1 phase, two
on the L2 phase and two on the L3 phase) the following configuration should be
entered:
•Inverter power: 12000 W
•Number of inverters: 2
•Phase: three single phases
However, if there are three 2 kW single-phase inverters (one inverter per phase)
the following configuration should be entered:
•Inverter power: 6000 W
•Number of inverters: 1
•Phase: three single phases

CDP
Application notes 11
4.- COMMUNICATIONS TEST AND REGULATION
4.1.- COMMUNICATIONS TEST
Check the communication between the inverter and the CDP, through the COM1
LED of the CDP:
A flashing (or steady) LED means communication has been correctly
established.
The flashing rate is one flash per second (if there is one inverter) and 1/n
if there are several inverters (where "n" is the number of inverters
connected).
If the COM1 LED is off, it means the CDP is not communicating with the
inverter. In this case check the communication cables and the inverter
communication configuration.
Correct communication between the CDP and the inverters connected to it can
be checked on the configuration web site. To do so, press the "Show system
status" button.
When this button is pressed, the CDP will scan the connected inverters and
indicate how many of the total number of inverters that the CDP has been
assigned to control have been detected.
The following image will appear if the communication is correct, Figure 7:
Figure 7: Checking communication between the CDP and the inverter.

CDP
12 Application notes
4.2.- REGULATION TEST
The following test can be performed to ensure the CDP is correctly performing
the regulation:
We assume a 3000W inverter generating 1400W.
Now we program the CDP indicating that the inverter power is 6000W. The CDP
will send the inverter a new setpoint so it can change its MPPT and the inverter
will reduce photovoltaic generation by 50%, generating 700W.
Do not forget to reprogram the CDP
with the initial inverter power value
after completing the test.

CDP
Application notes 13
5.- MAINTENANCE AND TECHNICAL SERVICE
In the case of any query in relation to unit operation or malfunction, please con-
tact the CIRCUTOR, SA Technical Assistance Service.
Technical Assistance Service
Vial Sant Jordi, s/n 08232 - Viladecavalls (Barcelona)
Tel.: [phone] (Spain) / [phone] (outside of Spain)
email: [e-mail]
6.- GUARANTEE
CIRCUTOR guarantees its products against any manufacturing defect for two
years after the delivery of the unit.
CIRCUTOR will repair or replace any defective factory product returned during
the guarantee period.
•No returns will be accepted and no unit will be repaired or replaced if it is
not accompanied by a report indicating the defect detected or the reason
for the return.
•
The guarantee will be void if the unit has been improperly used or the
storage, installation and maintenance instructions listed in this manual
have not been followed. "Improper usage" is defined as any operating or
storage condition contrary to the National Electrical Code or that surpas-
sing the limits indicated in the technical and environmental features of
this manual.
•CIRCUTOR accepts no liability due to the possible damage to the unit or
other parts of the installation, nor will it cover any possible sanctions de-
rived from a possible failure, improper installation or "improper usage" of
the unit. Consequently, this guarantee does not apply to failures occur-
ring in the following cases:
- Overvoltages and/or electrical disturbances in the supply;
- Water, if the product does not have the appropriate IP classification;
- Poor ventilation and/or excessive temperatures;
- Improper installation and/or lack of maintenance;
- Buyer repairs or modifications without the manufacturer's authorisation.

CIRCUTOR, SA
Vial Sant Jordi, s/n
08232 -Viladecavalls (Barcelona)
Tel.: [phone] - Fax: [phone]
www.circutor.es [e-mail]