Circutor CDP series Supplement

Connection and configuration of a
CDP with HUAWEI inverters
APPLICATION NOTES
(M028E1101-03-17A)

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.- PRELIMINARY CONSIDERAT I O N S ............................................................................................. 6
3.- INVERTER....................................................................................................................................... 7
3.1.-SUN2000-36KTL :COMMUNICATION CABLE..........................................................................7
3.2.-SUN2000-8KTL :COMMUNICATION CABLE............................................................................8
3.2.1. BUS TERMINAL ACTIVATION (“MATCH RESISTANCE”) ON THE FINAL BUS
INVERTER ..........................................................................................................................................9
3.3.-INVERTER COMMUNICATIONS CONFIGURATION.............................................................10
3.3.1. PERIPHERAL NUMBER CONFIGURATION....................................................................11
4.- CDP CONFIGURATION ............................................................................................................... 12
5.- REGULATION TEST .................................................................................................................... 13
6.- MAINTENANCE AND TECHNICAL SERVICE .......................................................................... 14
7.- GUARANTEE................................................................................................................................ 14

CDP
Application notes 5
LOG OF REVISIONS
Table 1: Log of revisions.
Date
Revision
Description
12/17
M028E1101-03-17A
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
HUAWEI has several models of inverter that can be managed by the Dynamic
Power Controller (called CDP from its acronym in Spanish).
For the CDP to correctly manage the inverter, both devices must be correctly
interconnected and programmed to communicate properly.
This application note is not intended as a substitute for the CDP or
inverter manual, but as further information for those wanting
to
interconnect both devices.
Even so, the instructions and manuals for each product should be consulted,
each company being responsible for providing respective technical support.
The different versions of inverter that can be managed by the CDP are:
HUAWEI SUN2000-8KTL
HUAWEI SUN2000-12KTL
HUAWEI SUN2000-17KTL
HUAWEI SUN2000-20KTL
HUAWEI SUN2000-23KTL
HUAWEI SUN2000-28KTL
HUAWEI SUN2000-33KTL-A
HUAWEI SUN2000-36KTL
HUAWEI SUN2000-42KTL
2.- PRELIMINARY CONSIDERATIONS
The CDP's configuration stores the nominal power value of the inverter to be
controlled, and periodically sends it the power percentage that must be
generated; therefore, when the CDP communicates with the HUAWEI inverter, it
constantly sends it a regulation percentage.
In the event of operating with several three-phase cascaded inverters, the CDP's
"Inverter Power" variable must be set to match the power sum for all the
inverters, so that each inverter is sent the same regulation percentage.
In the event of single-phase inverters being used in three-phase installations, the
total power for all inverters must be programmed: select the three single
phases option in the "Phase" variable, and then, in the "Number of inverters"
variable, enter the number of 3 single-phase inverter units available in the
installation.

CDP
Application notes 7
Example: if there are 6, 2kW single-phase inverters (2 in phase L1, 2 in phase
L2 and 2 in phase L3), the following must be configured:
•Inverter power: 12000W
•Number of inverters: 2
•Phase: three single phases
Whereas in the event of 3, 2kW single-phase inverters (1 inverter in each
phase), configuration must be as follows:
•Inverter power: 6000W
•Number of inverters: 1
•Phase: three single phases
3.- INVERTER
Communication between the CDP and inverter is via an RS-485 bus. This RS-
485 bus allows up to 100 inverters to be connected, although the majority of
domestic installations have between 1 and 3 inverters.
3.1.- SUN2000-36kTL : COMMUNICATION CABLE
List of communication cable terminals between the CDP and the inverter:
Table 2: List of communication cable terminals.
CDP
R2 channel communications
connector
INVERTER
OUT connector (RJ45)
Terminal
Description
Terminal
Description
1
TxD+
1
RS485A, RS485 differential signal +
3
TxD-
3
RS485B, RS485 differential signal -
If several inverters are connected to the RS-485 bus, pins 2 and 4 must be wired
from the first inverter to pins 1 and 3 on the next, etc., until reaching the last
inverter on the bus.

CDP
8Application notes
3.2.- SUN2000-8kTL : COMMUNICATION CABLE
List of communication cable terminals between the CDP and the inverter:
Table 3: Relación de bornes del cable de comunicaciones.
CDP
Conector comunicaciones
del canal R2
INVERSOR
Conector OUT (RJ45)
Terminal
Descripción
Terminal
Descripción
1
TxD+
1
RS485A, RS485 differential signal +
3
TxD-
2
RS485B, RS485 differential signal -
The cable must be connected according to the following diagrams. The
communications cable must be connected to the inverter's "IN" terminal. In the
event of several inverters, their communications cable must be connected from
the first inverter's "OUT" terminal to the next inverter's "IN" terminal, as shown in
Figure 2 , and successively until reaching the last inverter, whose bus terminal
resistance (“Match Resistance") must be set as activated.
Figure 1: Connection between a CDP and single inverter.
Figure 2: Connection between a CDP and several inverters.
The communications cable between inverters is a pin-to- pin cable with RJ45
connectors at both ends. This type of cable can be purchased at any computer

CDP
Application notes 9
store, since it is of standard use in connecting a PC or any other device fitted
with an ETHERNET port.
3.2.1. BUS TERMINAL ACTIVATION (“MATCH RESISTANCE”) ON THE
FINAL BUS INVERTER
Step 1: On the default screen, press to access the main menu.
Step 2: Select and press .
Step 3: Enter User Name and Password, using the ▲or ▼keys, and press .
Note: Select User Name: Advanced User. The Advanced User's initial pass-
word is 000001.If you forget your password, contact Huawei's technical help
desk for a dynamic password that is valid for one day only. Change the pass-
word after logging in.
Note: After successful authentication, the system stores the authentication data
for 30 seconds. If you exit the configuration page and log back in within 30 sec-
onds, no user authentication is required.

CDP
10 Application notes
Step 4: Select Com. Param. and press .
Step 5: On the Com.Param. screen, press .
Step 6: On the RS485 screen, change the Match Resistance parameter value to
Connect and press .
3.3.- INVERTER COMMUNICATIONS CONFIGURATION
The following describes how to configure the inverter using the display to ensure
correct communication with the CDP.
For the inverter to start operating, the AC part must be connected to the
mains.
Please refer to the inverter's instruction manual to solve any questions.
The parameters to be configured are as follows:
Peripheral number
Protocol type

CDP
Application notes 11
3.3.1. PERIPHERAL NUMBER CONFIGURATION
Follow the steps in section "3.2.1. BUS TERMINAL ACTIVATION (“MATCH
RESISTANCE”) ON THE FINAL BUS INVERTER” to reach the RS485 screen.
In the case of a single inverter:
•the peripheral number, Address, must be 01.
In the case of several inverters:
•when cascaded, both for single-phases connected to the same phase or
three-phases connected to the same three-phase AC network (all connected
to the same phase), consecutive numbers starting at 1 must be used.
•for multiple 3, single-phase inverter units connected to a three-phase net-
work, each controlling one phase, configuration must be as follows:
oInverters connected to phase 1: peripheral numbers (Address) be-
tween 01-33.
oInverters connected to phase 2: peripheral numbers (Address) be-
tween 34-66.
oInverters connected to phase 3: peripheral number (Address) be-
tween 67-99.

CDP
12 Application notes
4.- CDP CONFIGURATION
The CDP has a configuration web site 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”
The CDP configuration window will then open ( Figura 3).
Figura 3: CDP configuration web site.
In Inverter type, select the Huawei option.
For further details on configuring the CDP, please refer to the
manual.

CDP
Application notes 13
5.- REGULATION TEST
To ensure correct CDP management, we recommend regulation tests by varying
consumption and changing the CDP’s configuration. By way of example:
Suppose we have a 3000W inverter that is generating 1400W (this can be seen
on the inverter's display or by using the SUN 2000 APP).
If we program the CDP to indicate that the inverter's power is now 6000W
(instead of 3000W, which would be correct), the CDP would send a new signal to
the inverter for it to modify its MPPT and the inverter would reduce its output by
50%.
At the end of the test, do not forget to reprogram the CDP
with the
inverter's initial power setting.

CDP
14 Application notes
6.- 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]
7.- 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]