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Building Technologies

Basic documentation: Communication via the KNX bus

CE1P3127en

HVAC Products

Engineering notes

30.08.2007

2.3 Bus

topologies

Permissible bus topologies are: tree, line and star topologies. These topologies can
be mixed as needed. However, ring topologies are not permissible.
The tree topology is advantageous when creating a large network.

Tree topology

(with stub lines)

Line topology

(with loops)

KNX TP1

N1 .. N7 Bus devices

CE+

CE-

CE+

CE-

CE+ CE-

Device with
screw terminals

T-branch with
bus terminal

Device with
spring cage terminals

CE+ CE-

CE-

CE+

CE-

N1 .. N8 Bus devices

Advantage:
Tree topology

Branching and
connection variants

Summary of Contents for OZW775

Page 1: ...Edition 2 0 CE1P3127en 30 08 2007 Building Technologies HVAC Products 3127Z01 Synco Communication via the KNX bus For Synco 700 900 and RXB RXL Basic Documentation ...

Page 2: ...CE1P3127en HVAC Products 30 08 2007 Siemens Schweiz AG Building Technologies Group International Headquarters HVAC Products Gubelstrasse 22 CH 6301 Zug Tel 41 41 724 24 24 Fax 41 41 724 35 22 www siemens com buildingtechnologies 2003 2007 Siemens Switzerland Ltd Subject to change ...

Page 3: ...8 2 1 3 Bus load number E 18 2 2 Bus power supply 19 2 2 1 Decentral bus power supply 19 2 2 2 Power consumption of the bus devices 20 2 2 3 Central bus power supply 21 2 3 Bus topologies 22 2 3 1 Distances and cable lengths 23 3 Commissioning notes 25 3 1 Points to check prior to commissioning 25 3 2 Commissioning with the RMZ operator units 26 3 2 1 Starting commissioning plant mode Off 26 3 2 2...

Page 4: ...vice address with QAX34 3 room unit 49 5 7 Device address for the QAW740 room unit 51 5 8 Device address for RMZ792 bus operator unit 53 5 9 Addressing the couplers 56 5 9 1 Line couplers 56 5 9 2 Area couplers 58 5 10 Addressing the IP router 59 5 10 1 KNX network address 59 6 Basic communication settings 61 6 1 RM controllers 61 6 1 1 Decentral bus power 61 6 1 2 Clock time operation 61 6 1 3 Se...

Page 5: ... of large plants 90 9 Appendix 93 9 1 Faults and errors 93 9 1 1 Bus fault status message 93 9 1 2 Communication errors 94 9 2 Heating cooling changeover 95 9 2 1 Changeover via digital input 96 9 2 2 Changeover via analog input 97 9 2 3 Changeover based on calendar 98 9 2 4 H C changeover relay and fault messages 99 9 3 Room control combination 100 9 3 1 Application examples 100 9 4 Applications ...

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Page 7: ...range of functions for the devices installed in the network To promote interaction between products from a wide range of manufacturers interworking To certify products that fulfill the KNX standards To facilitate the commissioning of equipment in KNX networks To open the KNX bus to communications providers and utilities companies To exploit various transfer media bus TP1 wireless RF and power line...

Page 8: ...ses CSMA CA CSMA Carrier Sense Multiple Access CA Collision Avoidance to access the bus With this method of access every bus user has equal data transmission rights There is no communication master in contrast to the master slave principle The data is exchanged directly peer to peer between bus users A collision avoidance strategy is required when several bus users attempt to send a message on the...

Page 9: ...d for integration into higher level building automation and control systems selected data points of the Synco devices can also communicate in S mode Data points are also referred to as communication objects Description Ac Area coupler see section 1 4 DPSU Decentral Power Supply Unit see section 2 2 1 E Mode Easy Mode LTE mode is one of several Easy Modes ETS Engineering Tool Software HVAC Heating ...

Page 10: ...N3113 Room unit With setpoint adjuster and mode and timer buttons QAW740 N1633 Central communication units For remote operation and monitoring of Synco devices in KNX networks Central communication units for up to 4 10 or 64 Synco devices Central communication unit for up to 150 Synco devices OZW771 OZW775 N3117 N5663 Central apartment unit For management of one apartment Heating cooling ventilati...

Page 11: ...7x central communication units refers collectively to the following types Central communication units OZW771 xx where xx 4 10 or 64 Central communication unit OZW775 The term Synco bus devices refers collectively to the following types Synco 700 controllers RM Room controllers RX Room unit QAW740 Bus operator unit RMZ792 Central communication units OZW77x Synco 900 central apartment unit QAX910 Bu...

Page 12: ...1 2 3 64 1 2 3 64 1 2 3 64 1 2 3 64 1 2 3 64 1 2 3 64 Ac 1 0 0 Lc 1 1 0 Lc 1 2 0 Lc 1 3 0 Lc 1 15 0 Area 1 Line 1 Line 2 Line 3 Line 15 Main line 1 Lc 0 1 0 Lc 0 2 0 Line 1 Line 2 Ac 2 0 0 Lc 2 1 0 Lc 2 2 0 Lc 2 3 0 Area 2 Line 15 Main line 2 Ac 3 0 0 Lc 3 1 0 Lc 3 2 0 Lc 3 3 0 Lc 3 15 0 Area 3 Line 15 Main line 3 Ac 15 0 0 Lc 15 1 0 Lc 15 2 0 Lc 15 3 0 Area 15 Line1 Line 2 Line 3 Main line 15 Are...

Page 13: ... 15 have physical addresses from 15 1 0 to 15 15 0 1 3 2 Network address The network address for a full scale KNX network consists of the area line and device address It reflects the exact position of a bus device in the overall network and is unique within the network Syntax Area Line Device Area 0 Factory set for Synco bus devices 0 backbone Area 1 15 Line 1 15 Factory set for Synco bus devices ...

Page 14: ...e OZW775 central communication unit device address 150 can be modified 252 is used to connect the RMZ792 bus operator unit i e the bus operator unit uses this address if it is free otherwise it starts at 252 and looks for the next lower unused address 254 is used to connect the ACS operator station PC Laptop with ACS7 software i e the OCI700 1 service tool uses this address if it is free otherwise...

Page 15: ...utomation siemens com et gamma For large plants Siemens area line couplers from version R2 should be used these are stamped R2 as only these couplers contain the LTE filter table see section 8 2 IP1 routers are required when a KNX network needs to be connected to an IP network As a device the IP router is not technically the same as the area line couplers Instead of establishing a link within KNX ...

Page 16: ...16 120 Building Technologies Basic documentation Communication via the KNX bus CE1P3127en HVAC Products KNX Konnex and Synco 30 08 2007 Blank page ...

Page 17: ...plant diagram Network size within permitted limits 7 Determine type of bus power supply Decentral bus power Central bus power supply 8 Check limits Number of bus devices per line and area Size of network Adequate bus power with reserve for later expansion 9 Create network structure and wiring diagram Complete installation and commissioning documents When structuring a network special attention sho...

Page 18: ...pproximately 12 000 bus devices Based on 960 bus devices per area and a full scale network comprising 15 areas up to 14 400 bus devices can be installed in one network 64 bus devices can be connected to each of the 15 main lines giving a further 960 bus devices in addition to the 14 400 calculated above which makes a total of 15 360 bus devices Another 64 bus devices can be installed in each of th...

Page 19: ... as third party devices In such cases the devices must be set to Decentral bus power supply Off and a power supply unit must be installed see next section Central bus power supply In devices with a bus power supply the bus power section is electrically isolated from the KNX bus In addition to its own intrinsic consumption the QAX910 central apartment unit when set to Bus power supply On delivers t...

Page 20: ...Off and the devices without a bus power supply it is necessary to calculate the power con sumption from the KNX bus Power consumption values for Synco devices with Bus power supply Off RMU7x0 RMU7x0B universal controllers 5 mA RMH760 RMH760B heating controllers 5 mA RMK770 boiler sequence controller 5 mA RMB795 central control unit 5 mA RMS705 switching monitoring device 5 mA OZW775 central commun...

Page 21: ... as a means of determining the required power supply unit PSU see the relevant values on the previous page For a line accommodating 64 bus devices each with a power consumption of 5 mA 64 x 5 mA 320 mA a power supply unit of 320 mA is sufficient The following power supply units from Siemens are recommended for KNX networks see also GAMMA building management system Order codes 5WG1 125 1AB01 short ...

Page 22: ...ing topologies are not permissible The tree topology is advantageous when creating a large network Tree topology with stub lines Line topology with loops N2 N2 N1 N3 N4 N1 N4 N5 N6 N7 N3 KNX TP1 KNX TP1 3127Z02 N1 N7 Bus devices CE CE CE CE CE CE Device with screw terminals T branch with bus terminal Device with spring cage terminals 3127Z06en CE CE CE CE N1 N2 N5 N6 N7 N3 N4 N8 CE CE N1 N8 Bus de...

Page 23: ...er supply unit In a KNX network with central bus power supply PSU see section 2 2 2 the following information on distances must be observed Distance between two power supply units PSU Min 200 m Distance between bus device and nearest PSU Max 350 m Distance between bus devices Max 700 m Total length of all cables of one line Max 1000 m At least one power supply unit PSU is required for each line an...

Page 24: ...m between bus devices cannot be integrated on the bus if bus device N3 is integrated with a loop instead of a sub line If a maximum distance of 350 m is maintained between the central bus power supply PSU and a bus device without a bus supply the bus power supply unit must be located at the point between 150 m and 250 m on the 400 m section shown 100 m N1 N4 3127Z04en N2 200 m 100 m 100 m 400 m N3...

Page 25: ... unit Synco 900 central apartment unit QAX910 Devices without a direct connection for the operating voltage QAW740 room unit and RMZ790 RMZ791 operator unit Existing bus power supply Delivered by DPSU Synco 700 devices set to Decentral bus power On PSU Central bus power supply from power supply unit s Check that the plant is ready for operation The commissioning procedure is described in detail in...

Page 26: ...assword level Square with key 2 Highest access level password Commissioning requires access to the Password level From the start page the user logs in with the password and navigates to the required operating page or operating line via the predefined path Press the OK press and select knob on the operator unit for access to the Main menu page 3 2 1 Starting commissioning plant mode Off Before star...

Page 27: ...oning page now appears Select the Communication line for example by rotating the knob and then press the knob to open the Communication page Main menu Commissioning Communication Press the knob for access to the Basic settings page Plant operation Off Action Return to main menu Action Plant stopping Action Action Communication Action Commissioning Basic configuration Extra configuration Settings C...

Page 28: ...When commissioning is complete e g after Basic settings see the operating page above the repeated pressing of the ESC button results in the following warning Acknowledge the display of OK by pressing the knob the plant will start The display then reverts to the main menu Before leaving the main menu press the knob to open the Plant operation page Select Auto enable on the Preselection line and ack...

Page 29: ...ntrollers The settings can be read with the RMZ790 and RMZ791 operator units at the Service level indicated by the symbol From the start page press the OK knob for access to the Main menu see illustration below On delivery from the factory the start page displays the word Welcome instead of the device name The bottom of an operating page is indicated by the Arrow Up symbol For access to the top of...

Page 30: ...ans of super ordinate area and line couplers The other basic settings under Communication can be read by rotating the knob clockwise 4 1 2 Assigning device names The RMZ790 and RMZ791 operator units can be used to assign an individual device name e g plant name to every RM controller This device name is displayed on the second line of the start page in the RMZ790 and RMZ791 operator units On deliv...

Page 31: ...d select a character Press the knob to import the selected character to the text line Save the text line in the device Turn the knob counterclockwise until the OK field is displayed Press the knob to save the text line in the device Press ESC repeatedly to return to the start page and check the device name The device name may contain up to 21 alphanumeric characters maximum 21 characters including...

Page 32: ...The procedure is as follows Main menu Commissioning Communication Basic settings Turn the knob as required for access to setting mode In setting mode set e g Device address 10 by rotating the knob as required Press the knob to confirm the setting An internal test to check for address conflicts is indicated by the hourglass symbol When there are no more basic settings to be modified the commissioni...

Page 33: ... USB cable Type B socket KNX service cable RJ45 For Synco devices LPB service cable RJ12 For SIGMAGYR and ALBATROS controllers not illustrated below The OCI700 1 service tool ACS7 software are installed on a PC laptop from the CD ROM See data sheets N5640 and N5641 for details of the ACS7 software The OCI700 service interface converts the signals between the USB port on the PC laptop and the tool ...

Page 34: ...00 KNX must be selected as the type of central unit Select Type of central unit OCI700 KNX Complete the input by clicking Finish Description of the information in the Communication dialog box under Konnex bus system see screenshot on the right Device at OCI700 Only the device connected to the OCI700 service interface is imported into the device list If the OCI700 service interface is connected to ...

Page 35: ... points are refreshed in the devices Update the device list with Yes Communication Connected 5 1 4 Edit device list The following shows how to set a device address via ACS Service It is assumed that the user is familiar with ACS and how to use it In ACS Service select Plant Edit device list to open the Edit device list dialog box If the connection status is not already State Connected connection i...

Page 36: ... OK Address not assigned Address conflict Not found Device communicating without errors Device address 255 factory setting Limited device communication Device address already in use Device not found Devices with the following status information are highlighted in red Address not assigned still 255 Address conflict e g duplicate address assigned Not found The following devices are included in the l...

Page 37: ...3 address 254 is reserved for the OCI700 1 service tool The requirements for assigning the device address are as follows The OCI700 1 service tool ACS7 software must be installed on the PC laptop The user must be logged on at Service or Administrator level The PC laptop must be connected to the KNX bus via the OCI700 service interface either Directly via the bus socket or Indirectly to a Synco bus...

Page 38: ...unication purposes the RM controllers can be operated with the setting Decentral bus power supply On Alternatively a central bus power supply must be available see section 2 2 5 2 1 Assigning addresses manually With ACS service and manually assigned addresses the Synco 700 devices RXB RXL room controllers OZW77x central communication units and Synco 900 type QAX910 central apartment units can be a...

Page 39: ...licate addressing 1 In ACS Service select Plant Edit device list to open the Edit device list dialog box 2 Under Highlight devices with click the address problem button This button is only accessible if at least one device is highlighted in red 3 Click the address problem button to enable the button Automatically under Address assignment Click the button Automatically to assign the highest availab...

Page 40: ...ice at a time should be set to programming mode Explanation If two or more devices are set to programming mode the service tool cannot identify an individual device and transmit a device address specifically to that device 1 Set the required device to programming mode locally e g press the Prog button on the RMU730 The red Prog LED lights up 2 In ACS Service select Plant Edit device list to open t...

Page 41: ...s locally from the devices to be addressed 12 digit hexadecimal number e g ID 00FD0000139D 2 In ACS Service select Plant Edit device list to open the Edit device list dialog box 3 Identify the device from its ID and select it 4 Assign an address manually see section 5 2 1 5 Identify the next device from its ID select it and carry out Step 4 etc For all the programming modes described for the RM co...

Page 42: ...s the factory set area line address 0 2 is used 1 In ACS Service select Plant Edit device list to open the Edit device list dialog box see section 5 2 1 2 Select the central communication unit with the left mouse button and click the button marked Manually to open the Address assignment dialog box 3 Enter a device address in the range 1 253 excluding 150 and confirm by clicking the Write button 1 ...

Page 43: ...ant Refresh device list to open the Edit device list dialog box see section 5 1 4 OR In ACS Service select Applications Popcard and start a search for the address by setting the data point value Identify device address automatically to Yes When a network address has been found the data point command is reset to No 5 3 2 Restoring the factory settings OZW771 xx To restore the factory settings simul...

Page 44: ...ia the following connection PC laptop Æ OCI700 interface Æ RJ45 tool socket device or bus socket Æ OZW775 on KNX bus If there are no couplers or IP routers the factory set area line address 0 2 is used 1 In ACS Service select Plant Edit device list to open the Edit device list dialog box see section 5 2 1 2 Select the central communication unit with the left mouse button and click the button marke...

Page 45: ...CI700 service interface If other devices are installed on the same line the central apartment unit must be set to Bus power supply Off The path for these settings is Main menu Commissioning Bus communication Commissioning Basic configuration RF connections Device list Bus communication Basic settings Bus power supply Basic settings Device address 255 Bus power supply On Programming mode Off Bus po...

Page 46: ...0 When the input is complete the central apartment unit checks whether this address is already in use If it is not in use the display reverts to the Basic settings page This means that the address entered is permissible and has been adopted If a device address is entered which is already in use the address is not adopted The display does not revert to the Basic settings page The device address can...

Page 47: ...missioning Basic configuration RF connections Device list Bus communication Select the operating pages Bus communication and Basic settings and check that the Programming mode line has automatically been reset to Off Basic settings Device address 255 Bus power supply Off Programming mode Off The automatic reversion to Programming mode Off parallels the response of the red LED switching off e g the...

Page 48: ...vice list dialog box see section 5 2 1 2 Select the room controller with the left mouse button and click the button marked Manually to open the Address assignment dialog box 3 Enter a device address in the range 1 253 excluding 150 and confirm by clicking the Write button 1 Set the room controller locally to programming mode To do this press the programming button bottom right on the central commu...

Page 49: ...he buttons 10385Z70 Count move upward Count move downward Esc exit without confirmation Enter confirm acknowledge Restart After significant parameter changes the room controller is restarted Minor parameter setting with access in parameter mode is sufficient for setting the device address or complete network address Hold down the and buttons simultaneously for approximately 2 s until the display t...

Page 50: ...without making any changes Press Esc again for access to the list mode and a third time for access to the normal room unit mode The device address or network address is set via the following parameter numbers P 1 Area P 2 Line Network address P 3 Device address The same applies to the RXB RXL room controllers as to the Synco bus devices i e the area and line address is adopted by the super ordinat...

Page 51: ...used device address Confirm the setting with the presence button The address entered is automatically checked in this process If the entry is incorrect start the process again Once a QAW740 room unit has been connected to the bus power supply and a device address other than 255 has been set it is no longer possible to initialize the d field directly via the bus power supply The device address then...

Page 52: ...te button 1 Set the room unit locally to programming mode To do this press the presence button for approximately 12 seconds The display reads Prog 2 In ACS Service select Plant Edit device list to open the Edit device list dialog box see section 5 2 3 Click the Programming mode button to open the Address assignment dialog box 3 Enter a device address in the range 1 253 excluding 150 and confirm by...

Page 53: ...ral or central bus power supply is required for communication via the KNX bus see section 2 2 The bus operator unit is connected to an external AC 24 V power supply recommended for fixed operator units e g installed in control panel doors The factory setting is device address 255 For communication via KNX this device address must be modified If there are no couplers or IP routers the factory set a...

Page 54: ... with the left mouse button and click the button marked Manually to open the Address assignment dialog box 3 Enter a device address in the range 1 253 excluding 150 and confirm by clicking the Write button 1 Set the bus operator unit locally to programming mode To do this select the Communication operator page Main menu Commissioning Communication 2 Select the operating line Programming button and...

Page 55: ...M RMB RXB2 RXB2 RMB RXB2 RXB2 RMZ792 RM KNX TP1 RM Line 1 Line 2 Line 3 Area 1 3127Z39en Line coupler 1 Line coupler 2 Line coupler 3 It is possible to set the RMZ792 bus operator unit to search for bus devices in specified areas and lines Bus devices in areas and lines other than those defined in the search criteria must be added manually Note The RMZ792 bus operator unit only recognizes Synco 70...

Page 56: ...o bus devices adopt the area and line address dynamically from the area and line couplers Area and line addresses can be set with the coupler concerned in programming mode Only one coupler at a time should be set to programming mode To switch the coupler to programming mode press the learning button A5 learning button A5 is a term in the product and applications description enclosed with the Sieme...

Page 57: ...n is available under Address assignment 4 Click Programming mode The Address assignment dialog box opens Enter a line address in the range 1 15 syntax A L 0 from A 1 0 to A 15 0 and click Write to confirm 5 The new line address 11 is adopted automatically by the line coupler when the Write button is clicked 6 Close the Edit device list dialog box with click on Close button Note The red LED on the ...

Page 58: ... the Edit device list dialog box 9 Check that the Synco devices are now using the new line address 11 5 9 2 Area couplers The area address syntax A 0 0 from 1 0 0 to 15 0 0 can be set in Programming mode via ACS Service in the same way as for the line coupler In principle the method is the same as for the line coupler see Steps 1 to 9 above Note Area couplers are always the highest level elements ...

Page 59: ...instead of DC 24 V the AC 24 V operating voltage also used to operate the Synco devices is recommended The KNX network address of an IP router determines whether the router is operated as an area coupler or a line coupler IP router as an area coupler IP Ac A 0 0 1 0 0 to 15 0 0 IP router as a line coupler IP Lc X L 0 1 1 0 to 15 15 0 For an IP router used as an area or line coupler the KNX network...

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Page 61: ... time operation Clock time operation refers to the transmission of the date and time For the RM controllers this is set on the Clock time op line of the Basic settings operating page Main menu Commissioning Communication Basic settings Clock time mode RM controllers Default Master Settings Autonom Slave Master Note Clock time operation Master time master Clock time operation Slave time slave Clock...

Page 62: ...me and date in the time master can be modified as follows By the user on the time master By the user by remote adjustment of the time slave A user adjustment of the time or date can be synchronized by pressing the rotary knob Only one bus device at a time can be the time master in a network In relation to the date and time the other bus devices must be set as time slaves or set to Autonom 6 1 3 Se...

Page 63: ...ion Autonomous 3127Z38en Has its own time of day Remotely set time of day 10 24 Receives 10 24 Time day for timer function Receives 10 24 For its timer functions the QAW740 room unit requires the time from the time master It can receive the time over the KNX bus subject to the following criteria A bus device must be defined as the time master setting Clock time op Master The QAW740 room unit is co...

Page 64: ...wledged and reset if Remote reset fault Yes with the OCI700 1 service tool the RMZ792 bus operator unit and the OZW775 central communication unit Main menu Commissioning Communication Basic settings Remote reset faults for the RM controllers Default No Settings No Yes Apart from the RMH760 heating controller all RM controllers including the RMH760B heating controller incorporate the Remote reset o...

Page 65: ...r units e g for the RMU730 controller Commissioning Communication Basic settings 1 In ACS Service Applications Parameter settings open the menu tree of the device for which the basic settings defaults are to be modified 2 Double click the menu line Basic settings to open the operating page and select the data point for which you want to modify the default value 3 Double click the selected data poi...

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Page 67: ...ource side x x x x 1 31 Heat distr zone consumer side x x x 1 31 1 2 Heat distr zone heating surface x x 1 31 Heat distribution zone air heater x x 1 31 Heat distrib zone primary distr x 1 31 1 Heat distrib zone primary contr x 1 31 2 Refrigeration distribution zone x x 1 31 1 Refrig distr zone source side x x x 1 31 Refrig distr zone consumer side x x 1 31 1 Refrig distr zone cooling surface x x ...

Page 68: ...process values to be exchanged between the devices in a zone A further requirement is that the device address should be set in the devices see section 5 2 T 1 2 9 44 RM RM QAW740 RXB Outside temperature Outside temp zone 2 Room temperature Geogr zone 1 Geogr zone 1 Heat requis Heat zone 1 Heat demand Time switch operation Process value Zone Address Process value Zone Address Process value Zone Add...

Page 69: ...al zone apartment might better be referred to as an operating zone The geographical zone apartment is used in conjunction with the RM controllers the RXB RXL room controllers and the QAW740 room unit Main menu Commissioning Communication Room Geographical zone apartment RM default 1 RM B default Setting 1 126 The Room operating page and some other operating pages for the RM controllers RMU7x0 and ...

Page 70: ...lers In the Autonomous controller application a ventilation system is controlled independently of other plant according to its own room operating conditions For this application there is no need to set a zone address for the geographical zone apartm i e the default can be left unchanged Function Time switch operation If the room occupancy times for various geographical zones are identical one cont...

Page 71: ...dress of the time master For a detailed description of time switch operation with the RMU7x0B controller see the technical principles document P3150 Communication via zone addresses for specific devices is described in the basic documentation for the Synco 700 RM controllers These descriptions are all in the Communication section The titles and document numbers are as follows Universal controllers...

Page 72: ...the operating pages and operating lines To set the zone address use the following path to the Room operating page Main menu Commissioning Communication Room Turn the rotary knob to select the Geogr zone apartm line Turn the knob as required for access to setting mode In setting mode set the zone address rotating the knob as required Introduction Setting procedure Step 1 RM controllers RM B control...

Page 73: ...on Operator controls 1 For access to the setting mode press the presence button for approximately 6 seconds A letter A is displayed and the zone address can be set 2 Set the zone address with the rotary knob In this example the value is 5 hence A 5 Note A stands for Geographical zone Apartment 3 Briefly pressing the presence button again takes the user to other settings for setting values with rot...

Page 74: ...cularly efficient for extensive networks Once the relevant device has been selected the menu tree has the same structure as the path sequence for the operator units Commissioning Communication Room 1 In ACS Service Applications Parameter settings open the menu tree of the controller for which the zone address is to be set 2 Double click the menu line Room to open the operating page and select the ...

Page 75: ...Geographical zone subzone 0 15 1 Default value P011 Time switch zone apartment 1 126 1 Default value P012 Time switch zone room 0 63 1 Default value P013 Time switch zone subzone 0 15 1 Default value P014 Heat distribution zone air heater 1 31 1 Default value P015 Refrig distrib zone cooling coil 1 31 1 Default value P016 Heat distr zone heating surface 1 31 1 Default value P017 Refrig distr zone ...

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Page 77: ...rs with an enabled alarm relay Devices with room functions should be located on the same line as the devices with which they exchange data via KNX in LTE mode for example Synco QAW740 room unit Ù Synco RM controllers RXB RXL room controllers Ù Synco RMB795 central control unit Synco RM controllers for room control combinations see section 9 3 Only one bus device in the network may be configured as...

Page 78: ... 1 RMB 2 0 10 RX RX 2 0 20 RX 2 0 250 N140 13 0 2 254 1 N140 13 15 0 1 RM 1 N140 13 0 2 252 RMZ792 15 0 2 RMB 15 0 10 RX RX 15 0 250 15 1 10 RX RX 15 1 250 RM RMB 15 1 1 15 0 252 RMZ792 USB Line 1 Line 2 Line 15 Main line 1 Area 0 ACS alarm pager SMS fax Main line 2 PC with ACS Service interface Line 1 Main line 15 3127Z42en connector Bus connector socket Service cable RJ45 Ac 1 0 0 Ac 15 0 0 Lc 1...

Page 79: ...MZ792 2 0 252 15 1 10 RX 15 1 250 RMB 15 1 1 RX Line 1 Line 2 Line 15 Main line 1 Main line 2 Line 1 Main line 15 3127Z43en IP network Area line 0 PC with ACS Service interface Service cable Ac 1 0 0 Ac 2 0 0 Ac 15 0 0 Lc 1 1 0 Lc 1 2 0 Lc 1 15 0 Lc 15 1 0 LTE filter table 1 Normal route 2 Route all If Synco devices are used as alarm drains see OZW775 central communication unit and RMZ792 bus oper...

Page 80: ...ice cable RJ45 connector Bus connector socket Bus power supply Input and display unit Input and display unit Line 1 Main line 15 Switch actuator 3127Z44en Bus power supply Switch actuator Ac 1 0 0 Ac 2 0 0 Ac 15 0 0 Lc 1 1 0 Lc 1 2 0 Lc 1 15 0 Lc 15 1 0 LTE filter table 1 Normal route 2 Route all 3 Block all If the filter is set to Block all for area coupler Ac 15 0 0 no LTE telegrams are transmit...

Page 81: ...ia Cat5 cable When using IP routers the following rules must be observed With an IP router used as an area coupler IP Ac no other IP routers may be installed below the IP Ac in the topology With an IP router used as a line coupler IP Lc no other IP routers may be installed above the IP Lc in the topology When IP routers are used for coupling to an IP network the following points must be discussed ...

Page 82: ...x 0 2 1 0 2 2 0 2 3 0 2 x KNX KNX Ethernet cable Area line 0 IP Lc IP Lc Line 1 Line 2 3127Z09en For multiple IP router connections a switch box is required As part of the IP network the switch box represents area line 0 Straight Ethernet cables must be used when connecting IP routers to the switch box 1 0 0 KNX 1 2 0 1 1 0 3 0 0 KNX 3 2 0 3 1 0 2 0 0 KNX 2 2 0 2 1 0 0 1 0 KNX 0 2 0 KNX Switchbox ...

Page 83: ...40 13 Lc N140 13 Lc N140 13 Main line 2 KNX Area 1 Main line 1 IP network KNX Area 2 Main line 2 IP routers are also used to link worlds This method of coupling is used to link two or more KNX networks via an IP network In this case the IP routers connect the IP network to the KNX area line 0 of each of the KNX networks concerned The IP routers in all KNX networks must be set to KNX address 0 0 0 ...

Page 84: ...0 13 and version R4 and later for Siemens IP router N146 This means that the couplers and IP routers must be stamped R2 and R4 respectively see section 1 4 Note S mode telegrams are not subject to LTE filtering 8 2 1 Filter settings The filter settings in the area line couplers and IP routers are Normal route LTE telegrams of predefined zones and zone addresses are filtered see the table in sectio...

Page 85: ...ter table with the attributes Blocked or Routed are predefined and these attributes cannot be modified 1 The geographical zones comprise Geographical zone apartm Room Subzone Time switch zone apartment Room Subzone Time switch slave apartment Master slave zone apartm Room Subzone QAW op zone apartment 2 The heat distribution zones comprise Heat distr zone source side Heat distr zone consumer side ...

Page 86: ...addresses 1 15 are communicated only within the line i e telegrams with these zone addresses are blocked LTE telegrams with zone addresses 16 31 are communicated outside that line i e telegrams with these zone addresses are routed Z addr 1 15 3127Z46en Zone addr 16 31 Normal route Z addr 1 15 Z addr 1 15 Zone addresses that are blocked by the filter setting Normal route can be re used in other KNX...

Page 87: ...s The aim is to prevent the transmission of too many LTE telegrams e g heat demand signals from more than 15 devices in the same cycle If it is possible in a given plant to ensure that only a small number of LTE telegrams is transmitted in the same cycle or that the telegrams are short then it is acceptable to configure more than 15 devices with the same zone and zone address However observing the...

Page 88: ... 2 150 OZW775 1 N140 13 0 2 254 3 N140 13 2 N140 13 0 2 252 RMZ792 RX 15 1 2 15 1 1 RX 2 0 20 RX 2 0 21 RX RX 1 1 64 RX 1 1 2 RMB 1 1 1 N140 13 1 RX 1 15 64 RX 1 15 2 RMB 1 15 1 RM 15 0 3 RM 15 0 4 RM 2 0 2 RM 15 0 1 RM 15 0 2 RM 2 0 1 15 1 3 RX 15 1 4 RX 62 RX 4 RX 2 RX 62 RX AC 120 230 V N125 x1 USB Line 1 Heat zone source Refrig zone source Heat zone consumer 1 Refrig zone consumer 1 Line 15 Ma...

Page 89: ... devices on the secondary line and vice versa Æ two way communication If the filter is set to Normal route in the area line couplers and IP routers then alarms and remote time adjustments are transmitted only from the secondary line to the primary line Æ one way communication If the setting is Route all then alarms and remote time adjustments are transmitted from the secondary line to the primary ...

Page 90: ...ion 5 2 ff 3 Additional settings for the IP network in the IP router via ACS Service see further below If the area line couplers and IP routers are addressed before the bus devices them the bus devices will be ready to receive the area and line components of the address See Transmitting the subnet address below The following settings are possible in conjunction with transmission of the subnetwork ...

Page 91: ... should be retained default see section 8 2 The IP routers are factory set to obtain their IP address from a DHCP1 server The IP addresses can also be assigned manually with ACS see the next two screenshots 1 Dynamic Host Configuration Protocol DHCP is a Client Server Protocol which reduces the time and effort involved in assigning IP addresses Filtering of LTE telegrams IP address assignment ...

Page 92: ... address 30 3 254 for the system time Group address 30 3 254 is set in the Synco bus devices before they leave the factory When downloading new group addresses into Synco bus devices the group address 30 3 254 referred to above must be set up in the ETS3 tool and connected Only then can the download be initiated Without group address 30 3 254 and a connection for the system time it will no longer ...

Page 93: ... 9 1 1 Bus fault status message All faults messages are distributed over the KNX bus In this process the fault with the highest priority or in the case of equal priority the oldest fault can be displayed on the Fault status message bus operating page access via Service level Main menu Faults Fault status message bus The Fault status message bus operating page can be selected at all access levels T...

Page 94: ...m master failure plant 1 5411 Room mast fail pl 2 Room master failure heating circuit 2 Fault No Fault message on RMZ79x operator unit Setting errors 6001 1 id device address More than one device with identical device address 5002 1 clock time master More than one clock time master 5102 1 time switch pl 1 More than one time switch program active in same zone plant 1 5112 1 time switch pl 2 More th...

Page 95: ...nfigured in the H C Changeover function block Hand symbol checkbox selected The Heating Cooling mode is not affected by the type of changeover If several types of changeover are selected the required operating mode is determined in the following order of priority 1 Operating mode selector 2 H C changeover input 3 Heating cooling based on calendar The required Heating Cooling mode is transmitted by...

Page 96: ...g refrigeration distribution zone provided all controllers have the same heating refrigeration zone address 1 M T 1 T KNX 1 S1 S1 S1 S2 S2 x S2 S3 Q Y d 1 2 3 9 x Kältebedarf Q Y d S4 S4 S4 S5 1 2 3 9 2 M T 2 x Q 23 9 2 S1 S1 S1 S2 S2 x S2 S3 Q Y d 1 2 3 9 x Kältebedarf Q Y d S4 S4 S4 S5 1 2 3 9 x Q 23 9 T DI H C changeover Refrig demand Supervision Controller Controller Supervision Heat demand H ...

Page 97: ...geration distribution zone If the source of the H C changeover is an analog signal then two limit values must be selected for the changeover For further information refer to the basic documentation manual P3150 1 M T 1 KNX 2 M 2 T T 2 S1 S1 S1 S2 S2 x S2 S3 Q Y d 1 2 3 9 x Kältebedarf Q Y d S4 S4 S4 S5 1 2 3 9 x Q 23 9 1 S1 S1 S1 S2 S2 x S2 S3 Q Y d 1 2 3 9 x Kältebedarf Q Y d S4 S4 S4 S5 1 2 3 9 ...

Page 98: ...2 T S1 S1 S1 S2 S2 x S2 S3 Q Y d 1 2 3 9 x Kältebedarf Q Y d S4 S4 S4 S5 1 2 3 9 x Q 23 9 S1 S1 S1 S2 S2 x S2 S3 Q Y d 1 2 3 9 x Kältebedarf Q Y d S4 S4 S4 S5 1 2 3 9 x Q 23 9 9 S1 S1 S1 S2 S2 x S2 S3 Q Y d 1 2 3 9 x Kältebedarf Q Y d S4 S4 S4 S5 1 2 3 9 x Q 23 9 T M 1 2 Htg ClgCoil 2 3127S05 Htg ClgCoil 1 Flow Return H C changeover signal Heat refrig distribution zone 1 Precontrol H C changeover ...

Page 99: ... Heating cooling changeover relay N Q1 N Q2 The current contact position status of the changeover relay can be displayed via the Service level Main menu Heating cooling changeover Operating line Current contact position status Heating cooling changeover relay Open Off Cooling Closed On Heating In a 2 pipe heating cooling system without a Heating Cooling changeover signal on the KNX bus the control...

Page 100: ...erfloor heating The Room control combination function can be used for example enables a room to be heated with both radiator type heating and underfloor heating Exchanging the room temperature and operating mode over the KNX bus permits a joint control strategy with the following aims Optimum control e g boost enabled at the correct time The same room operating mode for both controllers time switc...

Page 101: ...troller e g two RMU7x0B controllers and they must be RMU7x0B controllers controlling the temperature in a warehouse the controllers can exchange information such as room temperature operating mode and setpoint over the KNX bus With this room control combination one ventilation controller must be set as the master and all the others as slaves QAW740 RMU RMU 3127Z49de Geogr zone 2 Room operating mod...

Page 102: ...de Individual setpoints Slave internal setpoint The slave ventilation controller operates with its own setpoints Room with underfloor heating and ventilation Another application of the Room control combination is a room with underfloor heating and a ventilation system Exchanging the relevant process values over the KNX bus enables a common control strategy to be applied with the following aims Opt...

Page 103: ...nces Î Room temperature influence 0 If the same room is controlled by an RMU ventilation controller and an RMH heating controller the RMU ventilation controller in this room control combination must be set to Master QAW740 RMU RMH 3127Z50en Geogr zone 3 Room operating mode Geogr zone 3 Ventilation 1 Room control comb Master Room control comb Slave ext setpoints Room unit Geogr zone 3 Room operatin...

Page 104: ...be divided into 5 room groups or geographical zone apartm Ground floor Î Geographical zone apartm 1 room group 1 Stairwell Î Geographical zone apartm 2 room group 2 All IT rooms Floors 1 4 Î Geographical zone apartm 3 Room group 3 All offices Floors 1 4 Î Geographical zone apartm 4 Room group 4 All laboratories Floors 1 4 Î Geographical zone apartm 5 Room group 5 3127Z15 3 5 2 4 5 2 4 5 2 4 5 2 4 ...

Page 105: ...4 Laboratory 1 1st floor Î Geographical zone apartment room 8 1 Laboratory 2 1st floor Î Geographical zone apartment room 8 2 Laboratory 3 1st floor Î Geographical zone apartment room 8 3 Laboratory 1 2nd floor Î Geographical zone apartment room 9 1 Laboratory 3 4th floor Î Geographical zone apartment room 11 3 3 11 2 7 10 2 6 9 2 5 8 2 4 1 3 11 3 11 2 11 1 7 4 7 3 7 2 7 1 8 1 8 2 8 3 3 4 1 4 2 4 ...

Page 106: ...n stream Up stream D1 C1 S1 Consumer side Source side The Coordinator and Dispatch Handler are defined as logical elements in the supply chain Their role is as follows The Coordinator collates the demand signals from all the downstream links in the chain and delivers the resulting demand signal to the link upstream The Coordinator also reports the operational status of the upstream links to the do...

Page 107: ...provided by the air supply chain The medium is treated in the air handling plant distributed via the ducting adapted if necessary by an air retreatment system to the requirements in the room and discharged into the room via air diffusers Branch to other rooms Cooling circuit Precontrol Heating circuit Heating surface Cooling surface Terminal units Air handling Hot water generation Chilled water ge...

Page 108: ...e room control ventilation Coordinator Chilled water precontrol Chilled water precontrol Coordinator Chilled water production Dispatcher Chilled water production Chilled water production 9 5 1 Data exchange in LTE mode The control chains and control circuits in an HVAC plant consist of data points The data points or their process values are programmed in function blocks to create the technical fun...

Page 109: ...nds before the process value is updated With a constant outside air temperature it may take a long time until the delta value is reached For this reason the outside air temperature is updated every 15 minutes This is referred to as a heartbeat However if the outside air temperature is still not transmitted after the first 15 minute delay the controller waits for a further 15 minutes plus 1 minute ...

Page 110: ... its use or where the consequences may be severe Lightning protection is mandatory for public buildings and buildings with assembly rooms The necessity of erecting a lighting protection system is determined by the building regulations of the country concerned Internal lightning protection is based on consistent equipotential bonding for lightning protection i e all metal components such as water h...

Page 111: ...rmation supplied by the manufacturers on the use of their products Lightning arresters can discharge high energy lightning current repeatedly without damage They are installed in the AC 230 400 V mains network and in the KNX network Lightning arrester Class B for the AC 230 400 V mains network Nominal leakage current of at least 10 kA 10 350 µs Protection level 4 kV Lightning arrester for the KNX ...

Page 112: ...it minimum cross section Cu 16 mm2 Al 25 mm2 Fe 50 mm2 230 400 V PE AC 230 V External lightning protection Bus device Surge arrester secondary protection Lightning arrester primary protection 3127Z14en Equipotential bonding rail Metal pipe duct Piping water room unit Bus device controller With Alternatives 1 and 2 a surge arrester must be installed as secondary on the bus device closest to the ent...

Page 113: ...e arresters this results in a bus fault bus low resistance Note that no message is generated by this bus fault Faulty surge arresters must be replaced immediately The use of surge arresters can improve the interference immunity of a KNX TP1 network regardless of any precautions for overvoltage protection in conjunction with lightning protection Surge arresters normally have the same dimensions as ...

Page 114: ... It is important right in the earliest project design phase to take care to avoid loops where possible or to keep the extent of any loops the loop area as small as possible The formation of loops must be considered in relation to the entire installation and all conductive components must be taken into account because the significant aspect of a loop is its overall area Note also Bus and mains volt...

Page 115: ...anagement Buildings with computer centers require EMC protection management in addition to lightning and overvoltage protection If a KNX network is installed in a building of this type it must be part of the EMC protection management The EMC protection arrangements must be agreed in detail with the person responsible for EMC protection management ...

Page 116: ...116 120 Building Technologies Basic documentation Communication via the KNX bus CE1P3127en HVAC Products Appendix 30 08 2007 Blank page ...

Page 117: ...6 Commissioning points to check 25 Communication errors 94 Communication of process values 68 Connection 35 CSMA CA 8 Current consumption of the bus devices 20 D Data points 9 Decentral bus power supply 19 Default in series B devices 70 Default values 28 Definition of terms 8 Design engineering procedure 17 Device address 14 Device address and device name 29 Device address for the OZW771 xx 42 Dev...

Page 118: ...er of bus devices 18 O OCI700 service interface 33 One way communication 89 Overvoltage protection 113 OZW77x central communication units 11 P Physical address 13 Point to point connection 82 Power supply unit PSU 21 Predfined LTE filter table 85 Productmarkings 11 Programming mode 40 R Reading the area line and device address 29 Remote reset of fault 64 Restoring the factory settings 43 RM contro...

Page 119: ...119 120 Siemens Building Technologies Basic documentation Communication via the KNX bus CE1P3127en HVAC Products 30 08 2007 Blank page ...

Page 120: ... CE1P3127en HVAC Products 30 08 2007 Siemens Schweiz AG Building Technologies Group International Headquarters HVAC Products Gubelstrasse 22 CH 6301 Zug Tel 41 41 724 24 24 Fax 41 41 724 35 22 www siemens com buildingtechnologies 2003 2007 Siemens Switzerland Ltd Subject to change ...

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