Gewiss Chorus GW 90876 User manual

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KNX interface for the energy meter - DIN rail mounting
GW 90876
Technical Manual

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Contents
1Introduction................................................................................................................................................. 3
2Application.................................................................................................................................................. 3
2.1Association limits................................................................................................................... 3
3“General” menu .......................................................................................................................................... 4
3.1Parameters............................................................................................................................ 4
3.1.1Timeout for “infrared disconnected” warning [sec]................................................................ 4
3.1.2Voltage upper and lower limit [Volt]....................................................................................... 4
3.1.3Enable energy counter reset................................................................................................. 4
3.1.4Dual Tariff meter.................................................................................................................... 4
3.1.5Energy meter measured unit................................................................................................. 4
4“Conditions for sending on change” menu ................................................................................................. 5
4.1Parameters............................................................................................................................ 5
4.1.1Sending Active Energy T1 value on change......................................................................... 5
4.1.2Sending Active Power value on change................................................................................ 5
5Communication objects.............................................................................................................................. 6
5.1Table of the communication objects that can be used with the GWD6801 meter................ 6
5.1.1Active energy consumed (Wh/Kwh)...................................................................................... 7
5.1.2Active Power (W)................................................................................................................... 7
5.1.3Active energy produced (Wh/Kwh)........................................................................................ 7
5.1.4Alarms voltage limits set exceeded....................................................................................... 7
5.1.5Alarms functioning range exceeded...................................................................................... 7
5.1.6Active power and load info.................................................................................................... 7
5.1.7Active energy counter reset................................................................................................... 8
5.1.8Generic warning bit ............................................................................................................... 8
5.1.9IR port warning bit ................................................................................................................. 8
5.1.10Product ID.............................................................................................................................. 8

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1 Introduction
This manual explains the functions of the “KNX interface for the energy meter” (GW90876), and how they
are set and configured with the aid of the ETS configuration software.
2 Application
This document describes the application programme of the KNX interface for the single-phase energy meter
GWD6801.
The GWD6801 meter makes it possible to use only some functions of this KNX interface.
2.1 Association limits
There are 10 communication objects that can be used with the GWD6801 single-phase meter, even though
many more are available for future uses with different meters.
The maximum number of associations that the device can store is 254.
The maximum number of group addresses is 254.

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3 “General” menu
The General menu contains the parameters used to configure general device behaviour. Fig. 3.1 shows the
default screen of the General menu, with the relative settable parameters.
Fig. 3.1
3.1 Parameters
3.1.1 Timeout for “infrared disconnected” warning [sec]
This parameter is used to set the timeout relative to object 91. By default, the alarm is transmitted if the IR
communication fails for more than 10 seconds.
The values that can be set range from 7 to 255 seconds.
3.1.2 Voltage upper and lower limit [Volt]
If the voltage detected by the meter exceeds the upper limit or goes down below the lower one, the relative
object 65 and the generic alarm (object 90) will be sent.
The upper limit threshold is configured by default to 276V and the values that can be set range from 184 to
276.
3.1.3 Enable energy counter reset
This parameter enables the objects for resetting the active energy meters (object 78) and the relative energy
meters (object 81), although the latter is only present for future uses with different meters.
The default value is No and therefore disables these communication objects.
3.1.4 Dual Tariff meter
This parameter is only provided for future uses with different meters, although it makes various
communication objects available with the No value.
3.1.5 Energy meter measured unit
Interfaced with the GWD6801 meter, this parameter determines the measure unit used by the interface in
active energy transmissions.
The default value is Wh, whereas the other available value is kWh.

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4 “Conditions for sending on change” menu
The Sending on change condition menu contains the parameters used to configure the mode in which the
consumed active energy and active power value is sent; fig. 4.1 shows the diagram with the relative
parameters that can be set.
Fig. 4.1
4.1 Parameters
4.1.1 Sending Active Energy T1 value on change
By enabling this parameter, it is possible to set the minimum variation for which the consumed active energy
value is transmitted on the BUS, via object 0.
The values that can be set range from 1 to 1000 based on the selected measure unit; the default setting is
10.
4.1.2 Sending Active Power value on change
By enabling this parameter, it is possible to set the minimum variation for which the active power value is
transmitted on the BUS, via object 8.
The values that can be set range from 1 W to 100 kW; the default setting is 1 kW.

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5 Communication objects
Below, fig.5.1 shows all the available communication objects, but only some can be used with the GWD6801
meter, which are indicated in the following table.
Fig. 5.1
5.1 Table of the communication objects that can be used with the
GWD6801 meter
# Object name Object
function Description Datapoint type
0
A
ctive Energy consumed
(Wh/Kwh) Sending value (Wh/Kwh)
Send on change based on the set
parameters or a consumed active
energy read request. 13.010 DPT_Active Energy
8
A
ctive Power (W) Sending value (W) Send on change based on the set parameters or a active power read
request . 14.056 DPT_Power
16
A
ctive Energy produced
(Wh/Kwh) Sending value (Wh/Kwh)
Sending only on produced and
exported active energy reading
request. 13.010 DPT_Active Energy
65
A
larms voltage limits set
exceeded Sending of alarms Sending of alarms with 8 bit coding. 8-bit unsigned value
67
A
larms functioning range
exceeded Sending of alarms Sending of alarms with 8 bit coding. 8-bit unsigned value
68
A
ctive power and load info Sending of feedback Sending of the type of power and
load used, with 8 bit coding. 8-bit unsigned value
78
A
ctive energy counter reset Enable meter reset Resets the value of the active
energy meters. 1.003 DPT_Enable
90 Generic warning bit Sending of alarm Sending of the generic alarm. 1.005 DPT_Alarm
91 IR port warning bit Sending of alarm Sending of the failed communication
with meter alarm. 1.001 DPT_Alarm
126 Product ID Sending of device ID Sending of the product code 16.000 DPT_Character
String (ASCII)

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The individual communication objects are described below:
5.1.1 Active energy consumed (Wh/Kwh)
This communication object transmits on the BUS the consumed active energy on change based on the set
parameters or in the case of a read request.
The enabled flags are C (communication), R (reading from BUS), T (transmission).
The standard format of the object is 13.010 DPT_Active Energy, the size of the object is equal to 4 bytes.
5.1.2 Active Power (W)
This communication object transmits on the BUS the active power on change based on the set parameters
or in the case of a read request.
The enabled flags are C (communication), R (reading from BUS), T (transmission).
The standard format of the object is 14.056 DPT_Power, the size of the object is equal to 4 bytes.
5.1.3 Active energy produced (Wh/Kwh)
This communication object transmits the produced and exported active energy value on the BUS only in the
case of a read request.
The enabled flags are C (communication), R (reading from BUS), T (transmission).
The standard format of the object is 13.010 DPT_Active Energy, the size of the object is equal to 4 bytes.
5.1.4 Alarms voltage limits set exceeded
This communication object transmits the set voltage limits on the BUS on change or in the case of a read
request.
The enabled flags are C (communication), R (reading from BUS), T (transmission).
As there is not a standardised format, the object is to be considered 8 bit unsigned and the following table
identifies its states.
Decimal value Binary value Alarm description
0 00000000
No alarm
1 00000001
Minimum threshold alarm
2 00000010
Maximum threshold alarm
5.1.5 Alarms functioning range exceeded
This communication object transmits the voltage and current overflow alarm on the BUS in compliance with
the maximum ranges of the instrument (i.e. the meter, type GWD6801), on change or in the case of a read
request.
The enabled flags are C (communication), R (reading from BUS), T (transmission).
As there is not a standardised format, the object is to be considered 8 bit unsigned and the following table
identifies its states.
Decimal value Binary value Alarm description
0 00000000
No alarm
1 00000001
Current overflow
2 00000010
Voltage overflow
3 00000011
Voltage and current overflow
5.1.6 Active power and load info
This communication object transmits on the BUS the feedback about the type of energy currently
accumulated and the load connected to the meter.
The information is available in the case of a read request.
The enabled flags are C (communication), R (reading from BUS), T (transmission).
As there is not a standardised format, the object is to be considered 8 bit signed and the coding is as
follows.

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Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit -1 Bit -0
n.u. n.u. n.u. n.u. With bit at 1:
Consumed
active energy
With bit at 1:
Produced and
exported
active energy
With bit at 1:
Inductive load
type
With bit at 1:
Capacitive
load type
A few examples to explain the coding:
Decimal value 9, in binary 00001001: means that the system is consuming active energy and the
load is a capacitive type.
Decimal value 10, in binary 00001010: means that the system is consuming active energy and the
load is an inductive type.
5.1.7 Active energy counter reset
This communication object is used to reset the active energy meters via value 1.
The KNX interface performs a command a few minutes after receiving, this is because the GWD6801
periodically checks the status of this command.
During the period that passes between receiving the command and resetting, the object responds with a 1 in
the case of a read request, which is then returned to 0 after resetting is complete.
The enabled flags are C (communication), R (reading from BUS), W (writing from BUS) and T (transmission).
The standard format of the object is 1.003 DPT_Enable, the size of the object is equal to 1 bit.
5.1.8 Generic warning bit
This communication object transmits an alarm on the BUS with value 1 if there is one or more alarms in
objects 65, 66 and 67; when the alarm stops, the value of this object is reset and is sent automatically on the
BUS.
The enabled flags are C (communication), R (reading from BUS), T (transmission).
The standard format of the object is 1.005 DPT_Alarm, the size of the object is equal to 1 bit.
5.1.9 IR port warning bit
This communication object transmits an alarm on the BUS with the value of 1 of no communication via the IR
port with the GWD6801 meter, when the timeout set in the interface parameters expires; when the alarm
stops, the value of this object is reset and is automatically transmitted on the BUS.
The enabled flags are C (communication), R (reading from BUS), T (transmission).
The standard format of the object is 1.005 DPT_Alarm, the size of the object is equal to 1 bit.
5.1.10 Product ID
This communication object transmits the product ID on the BUS in the case of a read request in a character
string of 14 Bytes composed as follows:
2 Bytes used for the character “
4 Bytes used for the hardware and software version
8 Bytes used for the instrument serial number, i.e. the GWD6801 meter
An example for explaining the coding:
Value received from the 14 Byte object: “13157H7F0012”
o2 Bytes for characters “ ”
o4 Bytes for characters 1315 (HW version 1.3 and SW version 1.5)
o8 Bytes for the characters 7H7F0012 (serial number of the connected instrument)
The enabled flags are C (communication), R (reading from BUS), T (transmission).
The standard format of the object is 16.000 DPT_ Character String (ASCII), the size of the object is equal to 14
Bytes.
Cod. 7.01.6.704.4

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LAST REVISION 02/2014 cod. 7.01.6.888.5