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Metering Gateway Modbus REG-K

MTN6503-0201

Application Metering Gateway 7602/1.0

Metering Gateway Modbus REG-K MTN6503-0201© Me rten 200902/13

|Many parameters and their settings are depend-

ent on the settings you have already made for oth-

er parameters. This means that some parameters

will appear or disappear and the values available

for selection will change according to settings you

have already made. These dependencies have

not been shown in the table for reasons of clarity.

All settings are always shown.

|Configurable times are set via the base and factor

parameters. The actual time is given by the multi-

plication of the two values. Example:

Base = 1 second, Factor = 3

Actual time = 3 seconds

|The bold values in a table are the values set dur-

ing factory configuration.

Table of contents

The KNX Metering Gateway is a device which connects

meters via the Modbus open standard to KNX. The

Modbus open standard allows you to receive a more in-

depth analysis of consumption in all areas of your build-

ing.

You can connect up to 10 of the following types of me-

ters based on Modbus remote terminal unit (RTU):

• Schneider Electric energy meters

• Schneider Electric power meters

• Schneider Electric Smart Interface Modules (SIM10M

module)

• Non-Schneider Electric Modbus RTU devices (offer-

ing you greater flexibility)

With the information which the KNX Metering Gateway

provides you can visualise energy or media consump-

tion. This can also be used to reduce consumption

through the use of control strategies within the KNX net-

work.

You can choose from 17 different pre-prepared tem-

plates for the meters and devices in order to quickly

connect to a KNX network. Each template contains the

20 most frequently needed Modbus values for simple

configuration.

From each connected Modbus RTU device the KNX

Metering Gateway can read up to an additional 40 Mod-

bus register values and transfer this data to the KNX

network.

You can read up to 10 meters using one KNX Metering

gateway. This makes the Gateway very cost-efficient.

Integrating a SIM10 module makes it possible to deter-

mine and visualise gas and water consumption.

The KNX Metering Gateway is also suitable for retrofit-

ting or for retroactive connection of existing Modbus

systems to KNX because it is fully compatible with me-

ters from other manufacturers.

The application is influenced by the following events:

• ETS download

• Bus voltage failure

• Bus voltage recovery

The behaviour differs according to function and can in-

fluence the measuring and monitoring function. There-

fore, you can set the behaviour using parameters at the

corresponding point. Refer to the chapter in question

for a precise description.

Application Metering Gateway 7602/1.0

• Function overview 1

• Behaviour of the application 1

• Modbus settings 2

• Metering device templates 3

– Metering device x 3

– Voltage and current monitor 4

– Power monitor 4

– Consumption monitor 5

– Template for SIM10M module 6

• Direct access to Modbus register 7

– Access to register X 7

– Modbus register X 7

• Diagnostic block 8

• Overview of parameters 9

• Overview of communication objects 11

Function overview

Behaviour of the application

Metering Gateway Modbus REG-K

MTN6503-0201

Modbus settings

The gateway always works in master mode and the

connected Modbus devices work in slave mode. Com-

munication from KNX bus to the Modbus is not possi-

ble.

Baudrate setting

The Baudrate is set depending on the distance be-

tween Modbus RTU devices. For instance with a Baud

rate of 9,600 bit/sec the maximum communication dis-

tance between 1 - 15 Modbus RTU devices is 1,200

metres. With the Baud rate of 19,200 bit/sec the maxi-

mum communication distance is 900 metres, as the ta-

ble shows below:

Parity refers to the technique of checking if transmis-

sion has been successful when transmitting between

devices. It lets you know if some data has been lost dur-

ing transmission.

Setting of parity

The Modbus supports only 11 bit frames. The ETS ap-

plication sets stop bits automatically depending on the

parity setting. "Parity" refers to the number of 1s in a giv-

en binary number. Odd parity means there are an odd

number of 1s and even parity means that there are an

even number of 1s. Parity bits are used as a means of

error detection as digital data is transmitted and re-

ceived. Both the Gateway and Meter must always be set

to the same as one another, odd, even or none. The de-

fault parity mode of Modbus is "even" parity.

|Make sure that all connected meters are always

set to the same parity as one another, odd, even or

one.

• Parity = None: choose between one and two stop bits

• Parity = Even: one stop bit is set

• Parity = Odd: one stop bit is set

|When parity is set to „None“ it is necessary to pre-

set meters PM2x0, PM7x0 and PM8x0 to one stop

bit (all other meters require a setting of two stop

bits here). This means that under „None“ parity

PM2x0, Pm7x0 and PM8x0 meters cannot be

combined with other meters. In their case it is nec-

essary to work with „Odd“ or „Even“ parity.

Parameters

Delay between frames

Some devices require considerable time after end of re-

sponse until they are ready to receive the following re-

quest from the master. In particular Schneider Electric

SEPAM power devices and legacy slave devices. As

they are slow in dealing with the original request they

may miss the following request.

The time between requests should be less than 3.5

characters according to the Modbus specification.

However, these legacy devices need more time. The

parameter „Delay between frames“ solves this problem.

The time is automatically adapted to 3.5 characters of

the transmission speed, but you have the choice to in-

crease this time if you need to support such slow legacy

devices.

Parameters

Start-up delay

The parameter „Start-up delay“ specifies from what

point measured values are counted in the application.

After an ETS download or bus voltage recovery, the de-

vice starts measuring the connected channels when

the start-up delay is complete.

Parameters

Modbus settings

Baudrate setting Maximum communication

distance for 1 to 15 Modbus

RTU devices

(Typical with Belden 3105A

cables)

9,600 bit/sec 1,200 m

19,200 bit/sec 900 m

Modbus settings

Parameters Setting

Baudrate setting (bit/sec) 1,200

2,400

4,800

9,600

19,200

Parity None

Even

Odd

Stop bit One stop bit

Two stop bits

Modbus settings

Parameters Setting

Delay between frames

1 ms* factor (50 .. 100)

Disabled

50 - 100 adjustable in steps of 10

Modbus Settings

Parameters Setting

Start-up delay

1 s * factor (1-250)

adjustable in single steps

Metering Gateway Modbus REG-K

MTN6503-0201

Metering device templates

Pre-installed ETS templates provide you with the 20

most frequently needed values which makes configura-

tion much easier and quicker. This also means there is

no need to map the Modbus register addresses to KNX.

The ETS application has special templates which you

use to implement the Schneider Electric Modbus RTU

based energy or power meters and SIM10M module.

These devices are outlined in the table below:

Metering device x

You can select the metering device you require from the

parameter „Type of metering device“. These are the 17

devices from the previous table.

Each connected device has a unique address, between

1 and 247, as per the Modbus addressing protocol. To

identify the device, you need to set its address at the

parameter „Address of metering device“.

The template allows you to to monitor different kinds of

values. To achieve this it has three monitoring functions

which you can enable by parameter. These are:

• „Voltage and current monitor“

• „Power monitor“

• „Consumption monitor“

With the parameter „Sending behaviour“ you can spec-

ify how all values of the monitors are sent. For a cyclical

sending, you can set the parameter „Time base“ to ei-

ther 1 second or 1 minute. The chosen setting applies

to all values of the whole template.

Parameters

Metering device templates

Supported devic-

Type Name Description

Energy/power meter PM9C power meter for the installation

distributor (cabinet) for measure-

ment with current transformers

Energy/power meter PM210 current, voltage, power and ener-

gy (each active/idle/apparent),

frequency and power factor

Energy/power meter PM710 slave pointer (min/max), Total

Harmonic Distortion (THD) I/THD

U harmonic distortion

Energy/power meter PM750 like PM710 with alarm contact

Energy/power meter PM810 like PM750 with 4-quadrant

measurement

Energy/power meter PM820 like PM810 with additional inte-

grated memory for logging events

and analysis of harmonics.

Energy/power meter PM850 like PM810 with harmonic content

Energy/power meter PM870 like PM850 with additional detec-

tion and logging of peaks of volt-

age and current

Energy/power meter PM1200 like PM210 withTHD I/THD U har-

monic distortion

Energy/power meter DM6200 Ampere, volt, frequency meter

Energy/power meter iEM3150 direct measurement to 63A,

records energy

Energy/power meter iEM3155 like iEM3150 with alarm contact,

MID compliant

Energy/power meter iEM3250 transformer measurement

Energy/power meter iEM3255 like IEM3250 with alarm contact,

MID compliant

Energy/power meter PM3250 4-quadrant measurement, THD I/

THD U harmonic distortion

Energy/power meter PM3255 like PM3250 with alarm

Smart Interface

Module

SIM10M input module for pulse counting.

Metering device x

Parameters Setting

Type of metering device Disabled

PM9C

PM210

PM710/PM750

PM8x0

DM1200

DM6200

iEM3150

iEM3155

iEM3250

iEM3255

PM3250/PM3255

SIM10M

Address of metering device 1 ..247

Read Modbus values after start Enabled

Disabled

Voltage and current monitor Enabled

Disabled

Power monitor Enabled

Disabled

Consumption monitor Enabled

Disabled

Sending behaviour Cyclically (as configured

time)

If value was changed

Time base 1 sec

1 min

Product specificaties

Merk:	Schneider
Categorie:	Niet gecategoriseerd
Model:	MTN6503-0201

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