Circutor CDP with ABB SUNSPEC inverters User Guide
- June 6, 2024
- Circutor
Table of Contents
Connection and configuration of a CDP
with ABB SUNSPEC inverters.
Note: Device images are for illustrative purposes only and may differ
from the actual device.
This manual is a CDP application note. For further information, please
download the full manual from the CIRCUTOR website:
www.circutor.com
IMPORTANT! The device must be disconnected from its power supply sources
(power supply and measurement) before undertaking any installation, repair, or
handling operations on the unit’s connections. Contact the after-sales service
if you suspect that there is an operational fault in the device. The device
has been designed for easy replacement in case of malfunction.
The manufacturer of the device is not responsible for any damage resulting
from failure by the user or installer to heed the warnings and/or
recommendations set out in this manual, nor for damage resulting from the use
of non-original products or accessories or those made by other manufacturers.
INTRODUCTION
For the CDP controller to appropriately manage ABB inverters, they both must communicate correctly and be properly programmed. This application note is not intended to replace the CDP manual, but an additional guide to those who want to interconnect both devices. However, each device’s guides and manuals are the documents that should be consulted, and each company will be in charge of providing the corresponding technical support.
COMPATIBLE INVERTERS
ABB has several inverter models that can be managed using the CDP dynamic power controller:
- UNO-DM-TL-PLUS
- PVS 50/60-TL
- PVS 100/120-TL
- PVS 175-TL
CONNECTION
The communication between the CDP and the inverters is carried out using the RS-485. The RS-485 bus allows connecting up to 100 inverters, although most domestic installations have between 1 and 3 inverters.
IMPORTANT!
The range of ABB UNO-DM-TL-PLUS inverters requires the RS-485 communications
card, called “UNO-DM-COM-KIT”. This card is NOT equipped in standard inverters
and must be directly ordered from the manufacturer.
The communications cable must be connected to the specific RS485 connector on
the “UNO-DM-COM-KIT” board or to the inverter’s own RS-485 connector
(depending on the model). A three-wire shielded cable is required to connect
the RS-485 communications line. The cable’s specifications are provided in
Figure 1.
To achieve proper communication between the CDP and the inverter, the RS-485
bus must be wired as described in Tables 1, 2, and 3.
Table 1: List of terminals: UNO-DM-TL-PLUS inverters.
UNO-DM-TL-PLUS inverters
| CDP | INVERTER |
|---|---|
| R2 channel communications connector | Connector (26) RS-485 card |
| Terminal | Description |
| 1 | A+ |
| 3 | B- |
| 5 | GND |
Table 2: List of terminals: PVS 50/60-TL inverters.
PSV 50/60-TL inverters (1)
| CDP | INVERTER |
|---|---|
| R2 channel communications connector | Connector (26) RS-485 card |
| Terminal | Description |
| 1 | A+ |
| 3 | B- |
| 5 | GND |
(1) The PVS 50/60-TL inverters feature two RS-485 communications ports. But
only port 2 with the “Modbus SUNSPEC” protocol can be configured to
communicate with the CDP.
Table 3: List of terminals :
PVS 100/120-TL and PVS 175-TL inverters.
PSV 100/120-TL inverters
| CDP | INVERTER |
|---|---|
| R2 channel communications connector | Connector RS-485 |
| Terminal | Description |
| 1 | A+ |
| 3 | B- |
| 5 | GND |
In the UNO-DM-TL-PLUS inverters, If there are several inverters in the RS-485
bus, wire the first inverter’s +T/R and – T/R terminals to the next inverter’s
+T/R and – T/R terminals, up to the bus’ last inverter.
The RS-485-2 port in the PVS 50/60-TL inverters has 2 layers that allow wiring
from one inverter to another until reaching the last bus inverter.
Note: Do not use the RS-485-1 port.
The RS-485 port in the PVS 100/120-TL inverters has 2 layers that allow wiring
from one inverter to another until reaching the last bus inverter.
The last inverter of the RS-485 communications bus must always be set to the
activated bus termination resistor (Figure 3, 4, and 5).
INVERTER CONFIGURATION
Below we explain how to configure the inverter using the display in order to achieve correct communication with the CDP:
- Protocol type: “Modbus Sunspec”.
- Baud Rate: 19200 bauds.
- Peripheral number: “Adress RS485”
If there is only 1 inverter, the peripheral number must be 02.
If there are several inverters:
• In cascade, which can either be single-phase connected to the same phase or three-phase connected to the same three-phase AC mains, they must have consecutive numbers from 02.
• For multiple sets of 3 single-phase inverters connected to a three-phase network, each addressing one phase, programming must be:
– Inverters connected to Phase 1: Peripheral no. from 01-33.
– Inverters connected to Phase 2: Peripheral no. from 34-66.
– Inverters connected to Phase 3: Peripheral no. from 67-99.
CDP CONFIGURATION
Access the CDP configuration website using a browser and via the device’s IP
followed by /setup: IP_equipo/setup
Below are the minimum parameters required configuring for correct adjustment:
Figure 7: CDP configuration.
Inverter type: ABB SUNSPEC
Inverter power: Total power of the inverters. If there is more than one
inverter, this value shall be the sum of all the powers of all
inverters.
Number of inverters: Total number of inverters connected to the CDP by phase.
Examples:
2 single-phase inverters → Number of inverters: 2
3 three-phase inverters → Number of inverters: 3
3 single-phase inverters in a three-phase main (1 per phase) → Number of
inverters: 1
6 single-phase inverters in a three-phase main (2 per phase) → Number of
inverters: 2
Phase: Select the type of inverter:
- single-phase, single-phase inverter.
- three phases, three-phase inverter(2).
- three single-phase, single-phase devices in three-phase main.(2)
To ensure no injection to the mains, we must select the lowest consumption
phase as a reference (Min. Power phase).
IMPORTANT!
Consult the manual for more information on how to configure the CDP.
REGULATION TEST
Below we detail a very simple process that ensures the correct adjustment of
the CDP:
With sufficient solar radiation, increase the real power of the inverters to
be controlled to a very high value, e.g. 1,000,000 W.
Save the setting.
Startup the CDP; we will see that the command sent by the CDP is 0 % or very
close to 0 %.
Check that the inverters’ output power matches this percentage. If the
inverters change their output power and adjust to the new command sent by the
CDP, the adjustment is being carried out correctly.
IMPORTANT!
Do not forget to reprogram the CDP with the initial inverter power value after
completing the test.
Technical service
CIRCUTOR SAT: 902 449 459 (SPAIN) / (+34) 937 452 919 (out of Spain)
Vial Sant Jordi, s/n
08232 – Viladecavalls (Barcelona)
Tel: (+34) 937 452 900 – Fax: (+34) 937 452 914
e-mail : sat@circutor.com