WAGO 750-8 Series User manual

Anwendungshinweis
WAGO-I/O-SYSTEM 750
ETHERNET Controller 750-8xx
Connecting Multiple WRF06LCD RS-485 Multifunction
Room Operating Units
Modbus®from Thermokon
to the WAGO-I/O-SYSTEM
Version: 10.04.2019

2 Imprint
Anwendungshinweis
© 2012 by WAGO Kontakttechnik GmbH & Co. KG
All rights reserved.
WAGO Kontakttechnik GmbH & Co. KG
Hansastraße 27
D-32423 Minden
Phone: [phone]
Fax: [phone]
Email: [email protected]
Web: http://www.wago.com
Technical Support
Phone: [phone]
Fax: [phone]
Email: [email protected]
Every conceivable measure has been taken to ensure the accuracy and
completeness of this documentation. However, as errors can never be fully
excluded, we always appreciate any information or suggestions for improving the
documentation.
We wish to point out that the software and hardware names, as well as the
trademarks of companies used and/or mentioned in the present manual, are
generally protected by trademark or patent.

Table of Contents 3
Anwendungshinweis
Table of Contents
1Important Notes........................................................................................... 4
1.1 Legal Principles ............................................................................................. 4
1.1.1 Subject to Change.......................................................................................... 4
1.1.2 Copyright ....................................................................................................... 4
1.1.3 Personnel Qualification.................................................................................. 4
1.1.4 Intended Use .................................................................................................. 4
1.2 Scope of Applicability ................................................................................... 5
1.3 Symbols.......................................................................................................... 5
1.4 Number Notation ........................................................................................... 6
1.5 Font Conventions........................................................................................... 6
2Description.................................................................................................... 7
3Material......................................................................................................... 7
4Setup.............................................................................................................. 8
5Sample Program........................................................................................... 9
5.1 Tasks.............................................................................................................. 9
5.2 Programming.................................................................................................. 9
5.3 Visualization Interface................................................................................. 12
6Configuration Interface............................................................................. 13
Required Libraries.............................................................................................. 20
List of Figures...................................................................................................... 20
List of Tables........................................................................................................ 20

4 Table of Contents
Anwendungshinweis
1 Important Notes
To ensure fast installation and start-up of the units, we strongly recommend that
the following information and explanations be carefully read and adhered to.
1.1 Legal Principles
1.1.1 Subject to Change
WAGO Kontakttechnik GmbH & Co. KG reserves the right to make any
alterations or modifications that serve the purpose of technical progress. WAGO
Kontakttechnik GmbH & Co. KG owns all rights arising from granting patents or
from the legal protection of utility patents. Third-party products are always
mentioned without any reference to patent rights. Thus, the existence of such
rights cannot be excluded.
1.1.2 Copyright
This documentation, including all figures and illustrations contained therein, is
subject to copyright protection. Any use of this documentation that infringes upon
the copyright provisions stipulated herein is prohibited. Reproduction, translation,
electronic and phototechnical filing/archiving (e.g., photocopying) and changes
require the written consent of WAGO Kontakttechnik GmbH & Co. KG, Minden,
Germany. Non-observance will entail the right of claims for damages.
1.1.3 Personnel Qualification
The use of the product described in this document is exclusively geared to
specialists having qualifications in PLC programming, electrical specialists or
persons instructed by electrical specialists who are also familiar with the
appropriate current standards. WAGO Kontakttechnik GmbH & Co. KG assumes
no liability resulting from improper action and damage to WAGO products and
third-party products due to non-observance of the information contained in this
document.
1.1.4 Intended Use
For each individual application, the components are supplied from the factory
with a dedicated hardware and software configuration. Modifications are only
permitted within the framework of the possibilities documented in this document.
All other changes to the hardware and/or software and the non-conforming use of
the components entail the exclusion of liability on part of WAGO Kontakttechnik
GmbH & Co. KG.
Please send your requests for modified and new hardware or software
configurations directly to WAGO Kontakttechnik GmbH & Co. KG.

Important Notes 5
Anwendungshinweis
1.2 Scope of Applicability
This application note is based on the stated hardware and software from the
specific manufacturer, as well as the associated documentation. This application
note is therefore only valid for the described installation.
New hardware and software versions may need to be handled differently.
Please note the detailed description in the specific manuals.
1.3 Symbols
Attention
Attention!
Boundary conditions that must always be observed to ensure smooth
operation.
Note
Important note!
Routines or advice for efficient use of a device and software optimization.
Information
Additional information
Refers to additional information which is not an integral part of this
documentation (e.g., the Internet).

6 Table of Contents
Anwendungshinweis
1.4 Number Notation
Table 1: Number Notation
Number System
Example
Comment
Decimal
100
Normal notation
Hexadecimal
0x64
C notation
Binary
'100'
'0110.0100'
In quotation marks,
nibble separated with dots
1.5 Font Conventions
Table 2: Font Conventions
Font Type
Explanation
italic
Names of paths and files are shown in italics, e.g.:
C:\Programs\WAGO-I/O-CHECK
Menu
Menu options are shown in bold, e.g.:
Save
>
A “greater than” between two names characterizes the selection of a
menu option from a menu, e.g.:
File > New
Input
Names of input or selection fields are shown in bold, e.g.:
Start of measurement range
“Value”
Input or selection values are shown in quotation marks, e.g.:
Enter the value “4 mA” under Start of measurement range.
[Button]
Button labels in the dialogs are displayed in bold and enclosed in
square brackets, e.g.:
[Input]
[Key]
Key labels on the keyboard are displayed in bold and enclosed in
square brackets, e.g.:
[F5]

Description 7
Anwendungshinweis
2 Description
The fundamental way of carrying out the communication between the WAGO I/O
System and the WRF06 RS-485 Modbus®multifunction room operating unit from
Thermokon is described in this application note. In addition, this application note
describes how the visualization interface in the library can be used to configure
the room operating unit.
3 Material
Table 3: Components
Supplier
Qty.
Name
Item No.
WAGO
1
Fieldbus Controller
750-871
WAGO
1
4-Channel Digital Input Module, 24 VDC
750-402
WAGO
1
4-Channel Digital Output Module, 24 VDC
750-504
WAGO
1
RS-232-/RS-485 module (configurable)
750-652
WAGO
1
Bus end module
750-600
WAGO
1
WAGO-I/O-PRO CAA
759-333
Thermokon
2
WRF06LCD DO2R
WRF06LCD
RS-485
Modbus®
DO2R
Optional components:
Table 4: Optional Components
Supplier
Qty.
Name
Item No.
WAGO
USB communication cable
750-923
Note
Node structure
The node structure described is only an example for the possible control of
WRF06LCD multifunction room operating units. The modules may be
exchanged as required by the respective application.

8 Table of Contents
Anwendungshinweis
4 Setup
Figure 1: Connection Diagram WAGO-IO-SYSTEM/Thermokon WRF06LCD
Communication Cable 750-923
Slave 2
Slave 1
A B +
-
-
24 VDC
A B +
-
24 VDC

Sample Program 9
Anwendungshinweis
Note
Access options
For the visualization of the WAGO-I/O-PRO CAA, it is essential to
establish a connection between the PC and the WAGO fieldbus controller.
Depending on the fieldbus controller used, two options are available. The
first option is available for all types of fieldbus controllers. Connection to
the fieldbus controller's service interface is established via 750-923 USB
communication cable. For the ETHERNET fieldbus controllers (e.g. KNX
IP and BACnet/IP), there is the option of connecting via the ETHERNET
interface.
5 Sample Program
5.1 Tasks
The WAGO-I/O-SYSTEM is to read and configure two Thermokon WRF06LCD
multifunction room operating units WRF06LCD RS-485 Modbus®. The available
ThermokonWRF06_01.lib library is used for this purpose.
5.2 Programming
The FbWRF06Master function block is used to establish a connection between
the controller and room operating units. This connection is implemented using an
RS-485 module. The individual room operating units are addressed cyclically
using the FbWRF06Master.
The data to be received or sent is exchanged between the FbWRF06Master and
all other WRF06-function blocks via the “typWRF06” input/output variable.
The multifunction room operating units can be configured via the
FbWRF06Config function block in conjunction with the associated
ConfigWRF06 visualization.
Note
Function Blocks
Both “FbWRF06Master” and “FbWRF06Config” function blocks are only
allowed to be requested once per bus segment.

10 Table of Contents
Anwendungshinweis
Figure 2: WRF06 Master and Configuration Module
One instance of the FbWRF06 function block is required for each room operating
unit to be addressed. The Modbus®address of the required slave is set at the
“bSlaveNo” input. “1” for Modbus®slave one.
The data of the room operating unit to be addressed is read via this function block
and the input values of the unit can be changed from the controller.
Among other things, the data read includes the current temperature, room
occupancy and set points. The possible inputs in the room operating unit include
the information saved in the input register of the device.
Note
Input and output values
More information about the input and output registers is available in the
register description of Thermokon.

Sample Program 11
Anwendungshinweis
Figure 3: Data Exchange with a Multifunction Room Operating Unit
The “SLAVE1_INPUT” input variable is of type “typWRF06_INPUT”. The
possible input values are depicted in this data type. The “typWRF06_INPUT”
input variable can be transferred to the specified segments via the “bRefresh”
input.
The “enumDeviceType” input is used to set the type of the connected room
operating unit.
Note
Value change
The data belonging to the segment (package) is transferred to the room
operating unit when there is a value change in the “typWRF06_INPUT”
structure or when setting a bit in the “bRefresh” byte.
The “tUpdateClock” input can be used to set the synchronization interval. If the
input value > “t#0s”, the time of the room operating unit is synchronized with the
“dtActualTime” input. If the synchronization interval is t#0s, no time is
transferred to the room operating unit. The update time is set to 1 hour in Figure 3.
The “xEnable” input can be used to switch ON/OFF communication between the
function block and the associated room operating unit.
Network 5, 6 and 7 of Figure 3 show how the dot operator can be used to access
individual variables within a structure.

12 Table of Contents
Anwendungshinweis
5.3 Visualization Interface
The DisplayWRF06 visualization shows, for example, how the output values of
the room operating unit can be displayed. Options have also been implemented in
the visualization to change input values.
The visualization makes it possible to read the output values for temperature, set
point 1 and current controller mode. In addition, the states of the buttons on the
room operating unit are also displayed. The required set point 1 can be entered in
the Input Set point 1 field. The [Enable] button is used to switch on the
respective Slave function block. The input values are transferred to the respective
room operating unit by pressing the [Refresh Slave] button. The [Alarm Message
1] button is used to switch on a previously defined (in the configuration) alarm
message.
Figure 4: Visualization Interface for Testing the Functions

Configuration Interface 13
Anwendungshinweis
6 Configuration Interface
The ConfigWRF06 configuration interface can be used to set the register values
of the WRF06 configuration register.
Note
Configuration Interface
The configuration interface is stored in the “ThermokonWRF06_01.lib”
library. It can be opened via the “Visualization” button . The
configuration interface must be connected to the instance of
FbWRF06Config using a wildcard character.
Note
Configuration Options
Depending on the WRF06 type, the configuration opens may differ. All
settings are always displayed in the visualization. However, not all settings
will cause a change. For type-specific settings, the WRF06-RS-485
Modbus®protocol description from Thermokon should be used.
Note
Configuration
Before a new configuration is written to the room operating unit, it is
recommended that you load the existing configuration from the room
operating unit via the [Read] button to check the current settings.
To make the settings on the interface, the “xEnable” input of the
FbWRF06Config function block in the project is set to “TRUE”.

14 Table of Contents
Anwendungshinweis
Figure 5: Locked Configuration InterfaceBasic parameters of the selected room operating
unit can be set or read from the “General” configuration page.
Like all other configuration pages, there is a Modbus®Slave field on the top left
that can be used to select the slave. There is a [Write] button on the bottom right
for writing the set configuration data to and a [Read] button for reading the
current configuration from the device. The Modbus®error code is output at the
bottom left.
Figure 6: “General” Configuration Interface

Configuration Interface 15
Anwendungshinweis
On the one hand, the values shown on the display can be selected on the
“Display” page and and on the other, the display of the room temperature can be
changed. There are also input fields on this page for possible alarm messages.
Figure 7: “Display” Configuration Interface
Note
Text Inputs
The length of the text to be input is limited to the three characters for the
units and to 14 characters for the remaining texts. However, these characters
may not be fully represented on the display of the WRF06LCD room
operating unit. For more information about the displayable text, see the
WRF06-RS-485 Modbus®protocol description “Text messages row 1 and
row 2” and “Units row 1, row 2 and row 3”.

16 Table of Contents
Anwendungshinweis
Figure 8: “Buttons/Inputs” Configuration Interface
The “Buttons/Inputs” configuration page are used to configuration the buttons on
the WRF06 room operating panel, as well as the functions of the digital inputs.
Note
Selection Options
Non-selectable settings are between the individual adjustable functions of
the buttons and the digital inputs. The settings are identified as
“ReservedButton0x..” and as “ReservedInput0x..”

Configuration Interface 17
Anwendungshinweis
Figure 9: “External values” Configuration Interface
The “External values” configuration page is used to affect how the external values
are displayed. Units and the description of the values can be modified.
Figure 10: “Set point 1” Configuration Interface

18 Table of Contents
Anwendungshinweis
Figure 11: “Set point 2” Configuration Interface
The “Set point 1” and “Set point 2” configuration pages can be used to view and
change the settings of both set points. The possible settings include the display
format, increment, adjustment limit and displayable texts. In addition, the set
point can be defined on this page after a reset.
Figure 12: “Controller settings” Configuration Interface

Configuration Interface 19
Anwendungshinweis
The controller settings can be made on the “Controller settings” configuration
page.
Figure 13: “Fan settings” Configuration Interface
The last configuration page is intended for fan settings. You have the option of
defining individual fan stages.

20 Required Libraries
Anwendungshinweis
Required Libraries
Table 5: Required Libraries
Library
Description
Standard.lib
Standard functions
mod_com.lib
Calculation of the Modbus®checksum
SerComm.lib
Basic functionality of the serial interface
Serial_Interface_01
Communication function block for the serial
module
Modb_I05.lib
Modbus®
ThermokonWRF06_01.lib
Function blocks for the RS-485 Modbus®
multifunction room operating units
SysLibRtc.lib
Reading the time from the controller
List of Figures
Figure 1: Connection Diagram WAGO-IO-SYSTEM/Thermokon WRF06LCD ..8
Figure 2: WRF06 Master and Configuration Module...........................................10
Figure 3: Data Exchange with a Multifunction Room Operating Unit .................11
Figure 4: Visualization Interface for Testing the Functions..................................12
Figure 5: Locked Configuration InterfaceBasic parameters of the selected room
operating unit can be set or read from the “General” configuration page. ..14
Figure 6: “General” Configuration Interface.........................................................14
Figure 7: “Display” Configuration Interface.........................................................15
Figure 8: “Buttons/Inputs” Configuration Interface..............................................16
Figure 9: “External values” Configuration Interface ............................................17
Figure 10: “Set point 1” Configuration Interface..................................................17
Figure 11: “Set point 2” Configuration Interface ..................................................18
Figure 12: “Controller settings” Configuration Interface......................................18
Figure 13: “Fan settings” Configuration Interface ................................................19
List of Tables
Table 1: Number Notation.......................................................................................6
Table 2: Font Conventions......................................................................................6
Table 3: Components...............................................................................................7
Table 4: Optional Components................................................................................7
Table 5: Required Libraries...................................................................................20