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ELWA® Modbus Interface Operation Manual 1018 , 17

ELWA® Modbus Interface

Operation Manual

1. Assembly

Before placing into operation it is essential to read the assembly instructions provided with the

device and the ELWA manual.

2. System requirements

The ELWA Modbus Interface can be used with all ELWA devices with rmware Version 1.30 or

high . Devices with serial numbers lower than 120100160810xxxx are equipped with earlier er

rmware versions.

To update the ELWA rmware USB Interface required. The update is not possible by a is

using the ELWA Modbus Interface.

If the ELWA Modbus Interface is used in combination with the Smart-Home System

LOXONE, the "Loxone RS485 Interface" and not the "Loxone Modbus Interface" has to be used,

otherwise Bus conicts may occur.

The latest software packages are available at www.my-pv.com.

3. Operation displays

The 3 LEDs on the top are the operation displays on ELWA. Functions are described in the ELWA

instruction manual.

The green LEDs underneath show the operation condition of the ELWA Modbus Interface: 3

No LED light no power supply :

all 3 LED blinking: no connection to the ELWA

upper LED light: connection to the ELWA ok

middle LED light: Modbus order received (timeout approx. sec) 5

LED operation display

Green ( ELWA) on

Yellow (on ELWA)

Red ( ELWA on )

green

ELWA® Modbus Interface Operation Manual 1018 , 17

A proper communication between ELWA und ELWA Modbus Interface is only possible with

exact positioning (see assembly instructions).

4. Pins

Power supply Either with the provided power supply unit via Micro USB interface

(5VDC) or with -24V DC at the two pins +24V/GND 12

Temperatur sensor Connect the provided temperature sensor at the two e „Temp“ pins.

Polarity does not matter.

Modbus Connect the Modbus at the pins A D+ and -. B D

Consider polarity!

5. Functionality

The ELWA Modbus Interface is a link between the ELWA and a Modbus based bus system.

Because of the bus capability the allocation of bus addresses is required when there are

multiple devices in operation (register 1030).

The bus address is saved the interface, not in the ELWA. in

Furthermore the interface can control the hot water securing of ELWA by the provided

temperature sensor. For this purpose the following settings have to be made:

The hot water securing (Boost) even is operative without an active Modbus.

Assuming that the additional temperature sensor in the boiler is positioned higher than the

ELWA, it is recommended to set the boost-temperature on the interface ( a little register 1009)

higher (e.g. 70 °C). Thereby the ELWA-internal control for hot water securing can be

circumvented.

The ELWA-internal control of the boost-time needs also to be adjusted. The corresponding entry

( ) has to be set to 1441. register 1020

ELWA® Modbus Interface Operation Manual 1018 , 17

If the sensor (see gure) indicates a value >80 °C the pins may not be connected correctly or

there might be a sensor break. A negative value can be an indication of a short circuit.

Terminating resistor in the b system us

Bus systems are high-resistive. For this reason, a terminating resistor (120 Ohm) must be set,

ideally at the most remote location of the bus master. The resistance is included in the package.

6. Modbus register description

Modbus RTU Standard Comm parameters 9600/8/N/1 All registers unsigned int (16 bit) , ,

1000 R Operating Day Counter

1001 R/W Operation mode (see Table 1), write 1 skips 10 minutes startup delay

1002 R DC Breaker status, 0: open, 1: closed

1003 R DC Relay status, 0:open, 1: closed

1004 R/W AC Relay status, 0: open, 1: closed write to register starts/stops ELWA AC relay ,

1005 R Temperature in 1/10°C

1006 R Current Water Temp Day minimum in 1/10°C

1007 R Current Water Temp Day maximum in 1/10°C

1008 R DC Temp Setting in 1/10°C

1009 R/W AC Temp Setting In 1 / 10°C

1010 R Internal Temperature of Electronics in °C

1011 R DC Isolation value

1012 R Voltage 0.1V DC

1013 R Current mA DC

1014 R Power in W DC

1015 R Current Day DC Energy in Wh

1016 R Total DC Energy kwh

1017 R Current Day AC Energy in Wh

1018 R Internal clock (minutes from noon)

1019 R Minutes since current day wakeup

1020 R/W AC boost mode, AC switch on time in minutes from noon

0 ELWA internal temperature controlled

1-1440 ELWA internal time controlled in minutes from noon

>1440 ELWA internal control o, controlled via ELWA Modbus Interface

Produktspecifikationer

Varumärke:	My-PV
Kategori:	Pannor & pannor
Modell:	ELWA
Plattform:	PC
Kompatibla operativsystem:	Windows 7, Windows 8.1, Windows 10
Minsta lagringsutrymme på hårddisken:	35 GB
Minimal processor:	Intel Core i5 750 2.6 GHz / AMD Phenom II X4 3.2 GHz
minsta-RAM:	4 GB
Språkversion:	Duits
Rekommenderad processor:	Intel Core i5 2400s 2.5 GHz / AMD FX 4100 3.6
Rekommenderat RAM:	8 GB
Rekommenderat lagringsdiskutrymme:	35 GB
Multiplayer-läge:	Nee
Spelgenre:	Strategie
Publiceringsdatum:	03.11.2015
Utgivare:	Ubisoft
Spelupplaga:	Verzamel
PEGI-betyg:	7
USK-klassificering:	6
Utvecklare:	Blue Byte
Maximalt antal offlinespelare:	1
Minimalt grafikkortsminne:	1 GB