CARLO GAVAZZI EM21 - COMMUNICATION PROTOCOL V1 REV0 Manual de usuario descargar pdf (Pagina 13)

CARLO GAVAZZI

CONTROLS

SERIAL COMMUNICATION PROTOCOL

WM24-96

V1 R0

Page

Example 10: partial meters reset command

1-word write request command (8 byte):

01h 06h 01h 08h 87h 35h CRC CRC

Write answer command (8 byte):

01h 06h 01h 08h 87h 35h CRC CRC

The reset value is 0. The meters which are reset by this command are depending on the “counter”

parameter:

- counter=TOT-PAR Reset meters: kWh (t1), kvarh (t1)

kWh (t2), kvarh (t2)

kWh (t3), kvarh (t3)

kWh (t4), kvarh (t4)

- counter=TOT-1.CN Reset meters: m

gas (day), m

gas (night)

- counter=TOT-2.CN Reset meters: m

gas, m

water

Example 11: all meters reset command

1-word write request command (8 byte):

01h 06h 00h ECh D4h F0h CRC CRC

Write answer command (8 byte):

01h 06h 00h ECh D4h F0h CRC CRC

All the total and partial meters will be reset by this command.

2.2.8 Agreement concerning active and reactive power and power factor signs

Active and reactive power and power factor signs in WM24-96 are in accordance with the agreement

stated in enclosure E of the EN 61268 standard, as explained here below.

LEGEND

a : Exported active power

b : Imported active power

c : Imported reactive power

d : Exported reactive power

• The reference vector of the diagram is the

current one.

• The phase angle between vector V and

vector I is Ô.

• The phase angle Ô is to be considered

positive trigonometric-wise

(anticlockwise).

Gross Automation (877) 268-3700 · www.carlogavazzisales.com · [email protected]

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