Related Manuals for Siemens RXB Series
Summary of Contents for Siemens RXB Series
- Page 1 Synco™ KNX bus communications Device range Synco 700, Synco living, RXB/RXL, RDG, RDF, RDU Basic documentation Edition 3.0 CE1P3127en Building Technologies 2013-04-08 For internal use only...
- Page 2 Siemens Switzerland Ltd. Sektor Infrastructure & Cities Building Technologies Division Gubelstrasse 22 6301 Zug Switzerland Tel. +41 41-724 24 24 © 2003-2013 Siemens Switzerland Ltd. http://www.siemens.com/sbt Subject to change 2 / 88 For internal use only Siemens KNX bus communications...
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Page 3: Table Of Contents
Communication via zone addresses ..........39 General notes on zones ............... 39 7.1.1 Synco zoning ..................39 7.1.2 Communication of process values ............40 For internal use only 3 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Contents 2013-04-08... - Page 4 9.7.1 Lightning protection ................80 9.7.2 Overvoltage protection ................. 83 9.7.3 Overvoltages in loops ................84 9.7.4 EMC protection management............... 85 Index ......................86 4 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Contents 2013-04-08...
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Page 5: Knx And Synco
DHW priority signals (e.g. while charging the DHW tank). Time synchronization (the time master synchronizes the time slaves). Remote indication of fault and error messages (e.g. sensor error). For internal use only 5 / 88 Siemens KNX bus communications CE1P3127en Building Technologies KNX and Synco... -
Page 6: Definition Of Terms
Devices with the same zone address exchange process values with each other, one zone address being capable of transmitting the values of many data points. 6 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies KNX and Synco... - Page 7 Communications standard, wired TP1 (twisted pair). Power Supply Unit (see Section 2.2.3). S-mode. System mode, configuration/commissioning with ETS only. Twisted Pair 1, data transfer medium: Bus For internal use only 7 / 88 Siemens KNX bus communications CE1P3127en Building Technologies KNX and Synco 2013-04-08...
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Page 8: Device Range
Synco 100, Synco 200 The devices in the Synco 100 and Synco 200 ranges are non-communicating and are not dealt with in this document. 8 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies KNX and Synco... -
Page 9: Collective Terms For The Device Types
Bus devices "Bus devices" include the Synco bus devices (see above) and devices from third- party manufacturers. Bus units use a KNX network address. For internal use only 9 / 88 Siemens KNX bus communications CE1P3127en Building Technologies KNX and Synco... -
Page 10: Product Markings On Synco Bus Devices
TP1 stands for: Twisted Pair 1 (1 pair of twisted wires). KNX configuration mode EE stands for Easy (mode), Logical Tag Extended. 10 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies KNX and Synco 2013-04-08... -
Page 11: The Knx Network
The arrangement of the bus devices in the 3-level KNX network structure, with the Synco bus devices factory set with Area/Line address 0.2 corresponds to the gray shaded area in the illustration above. For internal use only 11 / 88 Siemens KNX bus communications CE1P3127en Building Technologies KNX and Synco... -
Page 12: Network Address
In KNX terms, a subnetwork is the same as a line. Hence, the subnetwork address Subnetwork address consists of the address components "area" and "line". 12 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies KNX and Synco... -
Page 13: Device Address
RMZ790 and RMZ791 operator units (see Section 4.2) or with the ACS790 software. Remember not to use device addresses 150, 252 and 254 when addressing the bus devices. For internal use only 13 / 88 Siemens KNX bus communications CE1P3127en Building Technologies KNX and Synco 2013-04-08... -
Page 14: Area/Line Couplers And Ip Router
The couplers link the "communication islands" on the basis of the network layer (the router function of Layer 3 of the OSI reference model). The recommended area/line couplers are supplied by Siemens, order numbers: Siemens area/line coupler 5WG1 140-1ABx3, short code N140/x3 bus connected to main line and line via bus terminals. -
Page 15: Engineering Notes
Note special criteria in relation to lightning and overvoltage protection and EMC. overvoltage protection, For details see the discussion in Section 9.7. and EMC For internal use only 15 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Engineering notes 2013-04-08... -
Page 16: Number Of Bus Devices Per Line, Area And Network
The term "fictitious line 2" indicates that there is no need to install a line coupler 0.2.0. See the illustration in Section 1.3, Full-scale KNX network 16 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies... -
Page 17: Bus Load Number E
"Bus power supply = Off". In this case, the bus power must be supplied by setting other devices such as the RM… controllers to "Decentral bus power supply = Off", or by installing a power supply unit. For internal use only 17 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Engineering notes... - Page 18 Even with devices having a low current requirement (< 3 mA), the number of devices in a line must not exceed 64. See the data sheets for the power consumption of the new Synco devices. 18 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Engineering notes...
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Page 19: Power Consumption Of Bus Devices
IP router N146 from bus 10 mA The Siemens IP router N146 consumes 10 mA from the KNX bus despite the additional external auxiliary voltage AC/DC 24 V. Power consumption with auxiliary voltage: 25 mA at DC 24 V, max. 800 mW. -
Page 20: Central Bus Power Supply
Product data: Operating voltage AC 120…230 V, 50…60 Hz Bus voltage output DC 29 V (21…30 V, with choke) For KNX networks with IP routers, the following Siemens power supply unit is recommended: Order type: 5WG1 125-1AB22, short code N125/22... -
Page 21: Bus Topologies
Device with T-branch with Branching and spring cage terminals screw terminals bus terminal connection variants CE+ CE- CE+ CE- N1 .. N8 Bus devices For internal use only 21 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Engineering notes 2013-04-08... -
Page 22: Distances And Cable Lengths
22 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies... - Page 23 The allowed total length of 1000 m in the line is exceeded, if device N5 is integrated in the bus at the given bus wiring. For internal use only 23 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Engineering notes...
- Page 24 Empty page 24 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Engineering notes 2013-04-08...
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Page 25: Commissioning Notes
The communication of process values requires that the zones are connected in the process values devices via the zone addresses (see Section 7.1). For internal use only 25 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Commissioning notes 2013-04-08... -
Page 26: Commissioning With Rmz Operator Units
On the "Main menu" page, select "Plant operation". Main menu Commissioning... Time switch... Room operating mode... Plant operation... Action Press the OK knob to open the "Plant operation" page. 26 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Commissioning notes 2013-04-08... - Page 27 Main menu > Commissioning > Communication Communication Communication Basic settings... Room... Holidays/special days... Distribution zones... Action Press the knob to access the "Basic settings" page For internal use only 27 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Commissioning notes 2013-04-08...
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Page 28: Finish Commissioning, Plant Mode "Auto
Action Select "Auto" (= enable) on the "Preselection" line and acknowledge by pressing the knob. Press ESC to return to the start page. 28 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Commissioning notes 2013-04-08... -
Page 29: Device Address And Device Name
Main menu > Device information > Communication > Basic settings Device information Device information Controller… Extra configuration Communication… For internal use only 29 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Device address and device name 2013-04-08... -
Page 30: Assign Device Names
On delivery from the factory, the word "Welcome" is displayed instead of the device name. Wednesday 28.05.2013 15:06 Welcome « Information Main menu » 30 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Device address and device name 2013-04-08... - Page 31 Device names cannot be assigned to the Synco 700 RMZ78x extension modules. A device name can be assigned to each device at the same time as the device address via ACS790. For internal use only 31 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Device address and device name...
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Page 32: Set Device Address With Rmz790 And Rmz791 Operator Units
If no more basic settings are modified, the commissioning process must be finished (see Section 3.2.2). Note Device addresses can also be assigned to a device via ACS (see Section 5). 32 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Device address and device name 2013-04-08... -
Page 33: Device Addresses Via Acs
(and other devices on the bus). KNX service cable Service PC with interface ACS software RJ45 connector conduit box RM.. QAW740 For internal use only 33 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Device addresses via ACS 2013-04-08... - Page 34 Bus power supply A central or distributed bus power supply unit is required to communicate via the KNX bus (see Section 2.2). 34 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Device addresses via ACS...
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Page 35: Basic Communication Settings
Clock time op: Autonomous Rem set clock slave: Clock time mode, RM… controllers Default value. Master Setting values Autonom. / Slave / Master. For internal use only 35 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Basic communication settings 2013-04-08... -
Page 36: Set Time Slave Remotely
Dec bus power supp: Clock time op: Slave Rem set clock slave: Remote time-slave setting for RM… controller Default value. Setting values No/Yes 36 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Basic communication settings 2013-04-08... - Page 37 Clock time operation: Clock time operation: time of day for timer Master Slave function Geogr zone: 5 Geogr zone: X Geogr zone: 5 For internal use only 37 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Basic communication settings 2013-04-08...
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Page 38: Remote Reset Of Fault
Note Apart from the RMH780 heating controller, all RM… controllers (including the RMH760B heating controller) incorporate the "Remote reset of faults" function. 38 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Basic communication settings 2013-04-08... -
Page 39: Communication Via Zone Addresses
LTE transmission zone 1…4095 Note: x = fixed zone address (cannot be adjusted): Outside temperature zone = 31 Subzone = 1 For internal use only 39 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Communication via zone addresses 2013-04-08... -
Page 40: Communication Of Process Values
Time switch value Time switch value Time switch Master Slave Slave operation Zone: Address Geogr zone: 2 TS slave: 2 TS slave: 2 40 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Communication via zone addresses 2013-04-08... -
Page 41: Geographical Zone (Apartment)
"Geogr. zone 5": QAW740 RM.. Room temperature Room temperature Room unit Controller Geogr zone: 5 Geogr zone: 5 For internal use only 41 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Communication via zone addresses 2013-04-08... -
Page 42: Default Value
For this application there is no need to set a zone address for the "Geographical zone (apartment)", i.e. the default "---" can be left as is. 42 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies... - Page 43 Switching and monitoring device RMS705B P3123 For information on the room controllers, see document: FNC – Description of functions RXB/RXL CM110385 For internal use only 43 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Communication via zone addresses 2013-04-08...
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Page 44: Lte Reception And Transmission Zones
"transmitter", but several "receivers". A value can be sent and received via the input terminal. Via the output terminal, a value (digital or 0…10V) can only be sent. 44 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Communication via zone addresses... - Page 45 Range Factory setting N.X1 Main menu > Commissioning > Communication > LTE reception zones > Operating line Range Factory setting N.X1 For internal use only 45 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Communication via zone addresses 2013-04-08...
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Page 46: Address Zones With Rmz Operator Units
Note Zone addresses in the range 1…126 can be set for the "Geographical zone (apartment)" in the QAW740 room unit. 46 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Communication via zone addresses 2013-04-08... -
Page 47: Large Plants
Section 1.4). There is a limit to the number of LTE telegrams that can be transmitted via area/line coupler and IP router (see Section 8.2.4). For internal use only 47 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Large plants... -
Page 48: Network Topologies
As previously stated, one line (KNX TP1) can accommodate max. 64 bus devices. The addresses (x.y.250) should refer to the highest recommended bus device address (250}, not the max. possible number of bus devices. 48 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Large plants... - Page 49 To enable alarm sinks to receive all alarm signals (and other data) from the IP network, the IP router filter must be set to "Route all" (see Sections 8.2.1 and 8.2.5). For internal use only 49 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Large plants...
- Page 50 N125/x2 power supply unit must be installed in each line (main line 15, line 15.1 plus further lines 15.x, if applicable) for the bus power supply. 50 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies...
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Page 51: Ip Router As Coupler To Ip Network
IP routing multicast. addr. IP subnet mask IP standard gateway Note This document does not deal with the technical aspects of Ethernet communications. For internal use only 51 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Large plants 2013-04-08... - Page 52 1.1.0 1.2.0 2.1.0 2.2.0 3.1.0 3.2.0 Area 1 Area 2 Line 1 Line 2 Area 3 Area 0 IP router as area coupler 52 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Large plants 2013-04-08...
- Page 53 1.0.0 2.0.0 N140/13 N140/13 N140/13 N140/13 N140/13 KNX network 1 (area line 0) – IP network – KNX network 2 (area line 0) For internal use only 53 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Large plants 2013-04-08...
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Page 54: Lte Filter Table For Couplers And Ip Routers
Area/line couplers and IP routers with an integrated LTE filter table allow for filtering LTE telegrams to reduce the amount of data traffic. The LTE filter tables are only valid for Siemens area/Iine couplers N140/x3 and Siemens IP router N146. -
Page 55: Predefined Lte Filter Table
The predefined LTE filter table is available in the Siemens area/line coupler "Normal (route)" N140/x3 from Version R2, and in the Siemens IP router N146 from Version R4. The filter setting "Normal (route)" either blocks or routes the LTE telegrams from the zones and zone addresses. -
Page 56: Filtering, Zone Addresses, Communication Areas
All LTE telegrams with zone addresses 1…31 are communicated throughout the network (no filtering). Route all Z'addr. Z'addr. Z'addr. 1...31 1...31 1...31 Zonen addr. 1...31 56 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Large plants 2013-04-08... -
Page 57: Lte Telegrams Via Couplers And Ip Routers
LTE telegrams via couplers and IP routers Recommendation When using Siemens area/line couplers and IP routers together with Synco devices, we recommend to configure no more than 15 devices with the same zone (e.g. heat distribution zone) and the same zone address (see the addresses highlighted in green in Section 8.2.2). - Page 58 Heat distr zone Refrig distr zone Refrig distr zone RX... RX... RX... LTE filter table: 1) Normal (route), 2) Route all, 3) Block all 58 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Large plants 2013-04-08...
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Page 59: System Time, Alarms, And Remote Time Adjustment
The time can only be adjusted remotely via a time slave if the time master is located on the same line or on the next higher line. For internal use only 59 / 88 Siemens KNX bus communications CE1P3127en Building Technologies... -
Page 60: Engineering Large Plants
IP addresses. IP settings Other IP settings in ACS: IP routing, multicast addresses IP subnet mask IP standard gateway 60 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Large plants 2013-04-08... - Page 61 Windows registry. Please address questions about the required entries for this purpose to your ETS supplier. The special group addresses can also be downloaded via the HIT Info Center -> Product Overview -> Synco (www.siemens.com/hit) and imported in ETS. For internal use only 61 / 88...
- Page 62 Empty page 62 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Large plants 2013-04-08...
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Page 63: Appendix
RMZ790 and RMZ791 operator units or the "Fault 1" menu line in the ACS menu tree) and the highest-priority fault are not necessarily identical. For internal use only 63 / 88 Siemens KNX bus communications CE1P3127en Building Technologies... -
Page 64: Communication Error
5412 More than one controller operating as room master in the same >1 geogr zone [2] geographical zone (e.g. in RMH: Heating circuit 2). 64 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... -
Page 65: Heating/Cooling Changeover
"Yes". Main menu > Commissioning > Extra configuration > Heating/cooling ch'over Configuration Operating line Range Factory setting 2-pipe heating/cooling system No, yes. For internal use only 65 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... -
Page 66: Changeover Via Digital Input
Heat/refrig distribution zone 1 Controller Supervision Controller Supervision H/C changeover Heat demand Refrig demand Kältebedarf Controller Supervision Controller Supervision H/C changeover Refrig demand Heat demand Kältebedarf 66 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... -
Page 67: Changeover Via Analog Input
Heat/refrig distribution zone 1 Controller Supervision Controller Supervision H/C changeover Heat demand Refrig demand Kältebedarf Controller Supervision Controller Supervision H/C changeover Refrig demand Heat demand Kältebedarf For internal use only 67 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... -
Page 68: Changeover Based On Calendar
Refrig demand Kältebedarf Supervision Controller Supervision Controller H/C changeover Heat demand Refrig demand Kältebedarf Supervison Supervision Controller Controller H/C changeover Heat demand Refrig demand Kältebedarf 68 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... -
Page 69: H/C Changeover Relay And Fault Status Messages
">1 heat/cool changeover signal" is transmitted. Fault status message Text Effect 5802 5802 >1 heat/cool Non-urgent message; must be acknowledged. changeover signal For internal use only 69 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... -
Page 70: Room Control Combination Function
Controller 1 is defined as master room controller, and Controller 2 as slave room controller. The first step is to set the zone addresses of the "Geographical zone (apartm.)" in the controllers. 70 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... - Page 71 The slave controllers can use either the same setpoints as the master, or individual setpoints. For internal use only 71 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08...
- Page 72 (time switch and holiday/special day program, manual override). Automatische Umschaltung der Lüftungsregelung (Winter: Constant supply air temperature control, own setpoints). (Summer: Room/supply air cascade control). 72 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08...
- Page 73 Both controllers operate with the same heating setpoint. If a heating controller setpoint needs to be adjusted, it must be changed in the ventilation controller (master). For internal use only 73 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Appendix...
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Page 74: Application With Zones
From a technical perspective, this requires the building to be divided into eleven "geographical zone (apartm.)" or room groups. 74 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Appendix... -
Page 75: Additional Zones In The Rxb/Rxl Room Controller
For HVAC applications, the setting subzone =1 can be left unchanged. The supplementary labels "(Apartment)", "(Room)" and "(Subzone)" are predefined by KNX, where "Apartment" does not denote an actual apartment. For internal use only 75 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... -
Page 76: Supply Chains
Producer has one input from the distributor. Supply/demand Consumer transmits heating/refrig. demand to the upstream distributor Producer receives heating/refrig. demand from the upstream distributor. 76 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... - Page 77 The functional units correspond to the software mappings of the links in the chain and the plant elements. They contain all control, monitoring, and limiting functions required for operation. For internal use only 77 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Appendix...
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Page 78: Data Exchange In Lte-Mode
This is the equivalent of the zone addresses in Synco. LTE-Mode does not require time-consuming engineering to create the communication bindings to exchange process values. 78 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... -
Page 79: Update Process Values
Process values are not updated when the controller is in commissioning mode, i.e. if the "Commissioning" operating page is selected directly or as part of a sequence. For internal use only 79 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Appendix... -
Page 80: Lightning And Overvoltage Protection, Emc
External lightning protection Bus cable AC 230/400 V Piping Equipotential bonding rail Foundation ground Figure: Lightning equipotential bonding (primary protection) 80 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... - Page 81 External Surge arrester (secondary protection) lightning protection Lightning arrester (primary protection) device device (room unit) (controller) 230/400 V Equipotential bonding rail For internal use only 81 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08...
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Page 83: Overvoltage Protection
Where surge arresters are used instead of bus terminals, they must be connected to the nearest grounding point (e.g. protective conductor). Surge arresters (manufacturer: Dehn) are available from Siemens as off-the-shelf components in bus terminal format. Overvoltage protection Order no. -
Page 84: Overvoltages In Loops
The distance between conductor ends, earthed components and other conductor ends should be as great as possible. Maintain an adequate distance from the lighting protection system (e.g. from arresters). 84 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Appendix 2013-04-08... -
Page 85: Emc Protection Management
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. For internal use only 85 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Appendix... -
Page 86: Index
IP routers ............14 Default "----" in series B devices ......42 IP routers to link worlds ........53 IP settings with ACS ..........60 Default values ............. 28 86 / 88 For internal use only Siemens KNX bus communications CE1P3127en Building Technologies Index 2013-04-08... - Page 87 Update process values ........79 Physical address ..........12 Point-to-point connection ........52 Power consumption of bus devices ..... 19 Zone addresse with QAW740 ......46 For internal use only 87 / 88 Siemens KNX bus communications CE1P3127en Building Technologies Index 2013-04-08...
- Page 88 Siemens Switzerland Ltd. Sektor Infrastructure & Cities Building Technologies Division Gubelstrasse 22 6301 Zug Switzerland Tel. +41 41-724 24 24 © 2003-2013 Siemens Switzerland Ltd. www.siemens.com/sbt Subject to change 88 / 88 For internal use only Siemens KNX bus communications...