Danfoss ECL MODBUS OPC Operating instructions

Brand: Danfoss

Model: ECL MODBUS OPC

Type: Operating instructions

ECL MODBUS OPC

Instructions

DH-SMT/DK VI.KT.A2.02 © Danfoss 01/2008 DH-SMT/DK VI.KT.A2.02 © Danfoss 01/2008

VI.KT.A2.02 © Danfoss 01/2008 DH-SMT/DK

Instructions ECL MODBUS OPC

Table of Contents

1. Introduction 3

1.1 Prior to installation ......................................................................................................................................................................................................................4

2. How to install the program 4

3. Navigation in the Congurator 5

4. How to get started 5

4.1 Network scan .................................................................................................................................................................................................................................6

4.2 Device scan ....................................................................................................................................................................................................................................7

4.3 Device and tag names................................................................................................................................................................................................................8

4.4 Conversions ...................................................................................................................................................................................................................................8

4.5 Third party products ..................................................................................................................................................................................................................9

5. Installation and technical information 9

6. Troubleshooting 10

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Instructions ECL MODBUS OPC

1. Introduction

This instruction covers the ECL MODBUS OPC, i.e. the ECL MODBUS Congurator and the ECL MODBUS OPC Server.

The ECL MODBUS OPC Server uses the OPC Data Access Specication version 2.0.

The ECL MODBUS OPC Congurator and Server can communicate with ECL Comfort controllers with ECA 71 module. The

communication takes place by means of Windows COM ports, e.g. COM1. The Server can use multiple COM ports to support

multiple networks.

The ECL MODBUS OPC Congurator and Server are in the following referred to as Congurator and Server. The Congurator is

used for the setup of the Server. Setup changes will not take eect until the Server has been restarted.

The Congurator is an online tool that can scan a network for ECL Comfort devices and their parameters. Devices, groups and

parameters can also be added manually.

The network scan searches a network for installed ECL Comfort devices. The search is done from address 1 to address 247. The

network scan can only add new devices – existing devices will NOT be deleted.

The device scan retrieves the parameter list from the selected ECL Comfort controller. The parameters are placed in a hierarchical

structure depending on the ECL Comfort application. The device scan can only add new folders and parameters – existing

folders and parameters will NOT be deleted.

This help le is written for ECL MODBUS OPC version 1.1

It is recommended to make a backup of the OPC database before modications are carried out.

TCP/IP, USB or

RS-232 to

RS-485 (MODBUS)

SCADA system:

Connected via

Danfoss MODBUS

OPC server

ECL Comfort

Heat meter

M-Bus connection

Third party

OPC Client

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Instructions ECL MODBUS OPC

1.1 Prior to installation

Min. PC requirements

• Intel Pentium or equivalent processor

• Windows 2000®, Windows NT or Windows XP

• 128 MB RAM

• 500 MB free hard disk space

References

Type Description Code No. (Parts list No.)

ECA 71 MODBUS communication module 087B1126

Documentation available on http://heating.danfoss.com:

Instructions, ECA 71 protocol

Instructions, ECA 71 / 72 installation and user guide

(087R9775, English)

(087R9769, English)

Cables

The required cables will depend on the used equipment. Consult the MODBUS RS-485 converter documentation for further

details.

Please do also consult the ECA 71 instructions for details about the network layout and connection.

MODBUS RS-485 Converters

The MODBUS network uses a 2-wire RS-485 interface. This interface is typically not part of a standard PC, and it is therefore

necessary to connect a MODBUS RS-485 converter.

Basically there are 4 groups of converters:

• RS-232 ↔ RS-485

• USB ↔ RS-485

• TCP/IP ↔ RS-485

• Expansion module, e.g. PCI ↔ RS-485

Common requirements for all converters are that they have to be capable of running MODBUS RS-485, the desired

communication setting (baud rate, parity etc.) and must oer a Windows COM (Virtual COM) port interface to the Congurator

and Server.

The MODBUS standardspecies line termination and polarization. It is an advantage if this is built into the converter. It is

recommended to use isolated converters (and repeaters) to increase robustness.

For specic details, please consult the specications

• Modbus Application Protocol V1.1a.

• MODBUS over Serial Line, Specication & Implementation guide V1.0

both of which can be found on http://www.modbus.org/

Achievable performance will depend on the chosen converter.

2. How to install the program

Run the Setup.exe le on the PC onto which the OPC Server and Congurator must be installed. Follow the installation wizard.

The next step is to read the section on “How to get started”.

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Instructions ECL MODBUS OPC

3. Navigation in the Congurator

The Congurator resembles the Windows Explorer, with a left-hand side for level/item navigation and a right-hand side with

details for the selected level/item.

In the Congurator new ports, devices, groups and parameters can be added with a right-click of the mouse or by means of the

menu item ‘Edit’ ↔ ‘New’.

The illustration shows the hierarchical structure (as known from the Windows Explorer) with the newly created folders ‘NewPort’,

‘NewDevice’, ‘NewFolder’ and ‘NewDataItem’.

4. How to get started

After installation it is necessary to congure the database or select an already existing (valid) database. The database

conguration must be carried out with the Congurator.

An existing database can be selected by opening the database and closing the Congurator. When this is carried out, the

Congurator will ask whether the new database should be used for the Server.

For the conguration of a new database, the following steps must must be carried out for each network:

1. Run the Congurator (located in the start menu, ‘Programs’ ↔ ‘District Heating’ ↔ ‘ECL MODBUS OPC Server’ ↔

’Congurator’)

2. Add/select a port by specifying the COM port and the serial settings

3. Scan the network or add devices manually

4. Scan each device or add groups and parameters/tags manually

5. Close the Congurator

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Instructions ECL MODBUS OPC

The database is congured and the Server has the parameters/tags which an OPC client can use.

If the network is updated or expanded, e.g. new controllers are added or application cards changed, it is recommended to follow

the steps above for an update of the database conguration.

4.1 Network scan

The network scan is used to search the network for new devices. Third party products are not supported by this function, and

must be added manually.

The network scan can be activated in the port window. Before the scan, the correct communication parameters must be set.

The network scan takes approximately 1 – 5 minute to complete.

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Instructions ECL MODBUS OPC

4.2 Device scan

Device scan is used for nding the groups and parameters of a device. Whenever a device has been replaced, the application

changed etc., this function should be used. Third party products are not supported by this function, and must be added

manually.

The device scan can be activated in the device window – after the network scan. Before a scan, a device must be selected.

The device scan takes approximately 1 – 5 minute to complete.

The device scan can only be used for ECL type devices.

If a device is re-scanned, the old folders should be deleted.

The button ‘Fill Conversions’ must be used before a scan if the database does not contain the necessary scales. It adds/repairs

the necessary default conversions items.

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Instructions ECL MODBUS OPC

4.3 Device and tag names

Device and tag names are generated automatically. The names will therefore be the same from scan to scan if nothing is

changed (version of Congurator, ECA 71, ECL Comfort, or Application).

Whenever possible, the automatically generated names should be used, as this will reduce overall system setup modications.

Description eld can be changed if desired.

4.4 Conversions

All values can be converted (scaled) by the OPC Server.

To add/modify a conversion:

1. ‘Add/Modify’ a conversion in the Conversions folder.

2. For the parameters that require conversion, select ‘Use conversion’ in the parameter dialog and then select the appropriate

conversion

Default conversions ‘ECL Scale x’ is a conversion which is equal to 10x, e.g. ‘ECL Scale -1’ is equal to 10-1 (division by 10).

‘ECL Scale Schedule’ is used for all schedule values. As default the conversion will divide the values by 100, i.e. 8:00 is 8 and 8:30

is 8,3 (not 800 and 830). The conversion can be changed if this representation is not desired.

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Instructions ECL MODBUS OPC

4.5 Third party products

Third party products, such as general inputs/outputs, which support the standard MODBUS RTU interface can manually be

added with the Congurator.

New devices, groups and parameters can be added by a right-click of the mouse or the menu item ‘Edit’ → ‘New’.

Note that any third party products must use the same communication settings as the rest of the network (baud rate, parity etc.).

5. Installation and technical information

The installation includes the les ‘PNU & GROUP numbers parameter list.txt’ and ‘search list.txt’. These les are used during a

device scan and are not to be modied.

Cache function

The ‘Cache’ folder contains cached device scan results. When a new application type is scanned, a cache le is generated. If an

application type is known, the cached le will be used, thus eliminating a complete device scan. This will speed up the process.

The cache function can be enabled/disabled by creating/deleting the ‘Cache’ folder.

Scan timeout

The network scan timeout parameter can, if necessary, be changed by adding a DWORD value with the name ScanTimeout to the

registration database key.

HKEY_CURRENT_USER\Software\Danfoss A/S\ECL Modbus OPC Congurator\Options

The default value is 250 ms.

(The device scan uses the device read timeout).

Default database

The installation includes a default database named ECL_ModbusOPCCongurator.mdb.

Database compatibility

Databases from ECL MODBUS OPC version 1.0 are usable after the ‘Fill Conversions’ function has run.

Databases from Demo Iconics MODBUS OPC are not compatible.

Instructions ECL MODBUS OPC

6. Troubleshooting

Fault Cause Solution

No database Installation not complete • Uninstall and reinstall the program

Alternative

• Create a new database with ‘File’

→ ’New’

• Or open an existing database with

‘File’ → ‘Open’

When the program is closed, choose

‘Yes’ to set the new database as the

current one.

Network scan does not nd any

devices

False communication port and/or

settings

• Check that the COM port setting is

correct.

• Check that the cable/network is

connected correctly

• Check that cable termination and

polarization is correct

Device scan does not nd all

parameters

Not fully supported module • Manually insert the missing

parameters

• Update the Congurator if possible

Low server performance Invalid devices and/or parameters.

To high update rate requested.

Low performing converters/repeaters

• Remove invalid devices (that do

not exist in the network)

• Remove invalid parameters (that

do not exist in the device)

• Change the requested update rate

to a more reasonable value

• Check that converters and

repeaters are correctly installed

and have the needed performance

• Converters that run over other

media (e.g. the internet) can

introduce delays

OPC server doesn’t work or client can’t

connect to it

The OPC Core Components are not

fully installed

(this problem normally only occurs on

a PC with no prior installation of an

OPC system)

• Install the OPC Core le from the

folder “{installpath}\OPC Core

Components Redistributable x.xx.

xxx\Release”

Instructions ECL MODBUS OPC

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products

already on order provided that such alterations can be made without subsequential changes being necessary in specications already agreed.

Disposal Instruction

Equipment containing electrical components shall not be disposed together with domestic waste.

It must be collected separately with other electrical and electronic waste according to local legislation.