CooLinkNet CooLinkNet PRM CooLinkNet Universal Interface Adapter for HVAC Split Systems

CooLinkNet Universal Interface Adapter for HVAC Split Systems Document Revision 0.4 /5/06

Contents Table of Contents Document Revision History 4 Acronyms 5 3 Outlines 6 3. Layout... 6 3. Models... 7 8 4 Connectivity 4. HVAC Lines... 8 4. Connection Diagrams... 9 CooLinkNet FJ CooLinkNet ST CooLinkNet MT. 9. 0. 0 4.3 RS3 Port... 4.4 Ethernet... IP Server. 4.5 RS485... 4.6 USB... 4.7 Power... 3 5 5. General Protocol... 3 Definitions Messaging Exit Code UID... 3 3 4 5. Commands Reference... 4 Configuration Commands. set line ifconfig boot HVAC Status and Control. Commands on off cool heat fan dry auto temp fspeed 4 4 5 6 7 7 7 8 8 9 9 9 0 0

filt stat ls query swing iset feed eco 6 ModBus RTU Contents 3 3 4 4 5 6 7 6. ModBus Address... 8 Map

Document Revision History 4 Document Revision History CooLinkNet FJ Rev 0.3 CooLinkNet DK CooLinkNet ST Rev 0. Meitav-tec models supported: CTU 4500 3 BT, CTU4500 H3 WS, CTU450 CP IRD 05, CTU450 IRD 05, FMH4850 Rev 0. Preliminary

DTE GPIO HVAC N.C. TBD Acronyms 5 Acronyms Data Terminal Equipment General Purpose Input/Output Heating Ventilation and Air Conditioning Not Connected To Be Defined

3 Outlines 6 Outlines 3. Layout () - Mini USB Device Connector Used to connect CooLinkNet to PC USB Host for FW Update and maintenance. () - RS3/IO Connector Pin Number 3 4 5 Pin Name RS3_TX RS3_RX VDCGPIO GPIO Function RS3 Transmit RS3 Receive Ground General Purpose IO General Purpose IO (3) Power, HVAC, ModBus Connector Pin Number 3 4 5 6 Pin Name VDC+ VDCHVAC HVAC MOD_A MOD_B Function Input Voltage Ground HVAC Line L / L4 ModBus A(+) Terminal / HVAC Line L3 ModBus B(-) Terminal / HVAC Line L3

Outlines 7 (4) I/F Connector RJ Interface connector (5) ETH Connector RJ45 Ethernet connector 3. Models Model HVAC Manufacturer CooLinkNet ME Mitsubishi Electric CooLinkNet DK Daikin CooLinkNet ST Daikin CooLinkNet FJ Fujitsu/General CooLinkNet TD Tadiran CooLinkNet MT Meitav Lines Number Name L4 L3 L L4 L3 L L4 L3 L4 L3 L L4 L3 L L3 MM ModBus* MAC PP ModBus* KRP ST ModBus* FUS/GEN ModBus* TI (Inverter) TAD (Split) ModBus* MT(Meitav-tec) ModBus* ModBus* - Modbus RTU Slave for DTE integration.

4 Connectivity 8 Connectivity 4. HVAC Lines Depending on the specific CooLinkNet model it supports up to four HVAC Lines denoted as L, L, L3, L4. Below tables describes relation between physical connections and HVAC Line numbers. CoolLinkNet ME CooLinkNet ME Indoor Unit Manufacturer Mitsubishi Electric HVAC Line Connectors Terminals RS3 /IO VDC+ TB6 No Polarity CN05 VDC- HVAC HVAC MOD A MOD B I/F (RJ) wires Name L4 (TB6) L (CN05) MM MAC CoolLinkNet DK CooLinkNet ME Indoor Unit Manufacturer Daikin HVAC Line Connectors Terminals RS3 /IO VDC+ P P No Polarity S VDC- HVAC HVAC MOD A MOD B I/F (RJ) wires Name L4 (P P) L (S) PP KRP CoolLinkNet ST CooLinkNet ME Indoor Unit Manufacturer Terminals Daikin Siesta HVAC Line Connectors RS3 /IO 3 4 5 VDC+ VDC- HVAC HVAC MOD A MOD B I/F Name (RJ) BRC5A6 RCV GND +5V TX Indoor Socket L4 ST CooLinkNet FJ CooLinkNet FJ Indoor Unit Manufacturer Fujitsu/ General Terminals RS3 /IO RED BLACK WHITE HVAC Line Connectors VDC+ VDC- HVAC HVAC MOD A MOD B I/F (RJ) Name L4 FUS/GEN CooLinkNet TD

Terminals RS3 /IO 9 CooLinkNet TD Indoor Unit Manufacturer Connectivity HVAC Lines Connectors VDC+ VDC- HVAC HVAC MOD A MOD B I/F (RJ) Name Tadiran Inverter RED BLUE YELLOW GREEN L TI Tadiran Split RJ L4 TAD CooLinkNet MT CooLinkNet ME Indoor Unit Manufacturer Meitav-tec Terminals RS3 /IO HVAC Line Connectors VDC+ VDC- HVAC HVAC MOD A MOD B I/F (RJ) A(+) B(-) Name L MT 4. Connection Diagrams 4.. CooLinkNet FJ Connection of the original Fujitsu/General wired remote controller is optional. Connection of the CooLinkNet with APG or compatible wired remote controller Connection of the CooLinkNet with EZ-099CWSEFR or compatible wired remote controller

Connectivity 0 Indoor Unit power reset required after connecting CooLinkNet or wired remote controller. 4.. CooLinkNet ST Connection of the original BRC5A6 wired remote controller is optional 4..3 CooLinkNet MT Meitav-tek controllers are operated via Modbus interface. In this case CooLinkNet acts as a Modbus master. On CooLinkNet side connection should be done via HVAC and HVAC terminals. CooLinkNet Terminal Meitav-tek Terminal HVAC A HVAC B

Connectivity CooLinkNet MT supported models: Meitav-tec Model CooLinkNet FW version CTU 4500 3 BT CTU4500 H3 WS CTU450 CP IRD 05 CTU450 IRD 05 FMH485-0 CTU450 C H3 0 BT CTU450 CP H3 0 BT CTU4500 3S FC SUPER CTU4500 H CTU450/CTU80-CP-HP 0.. 0.. 0.. 0.. 0.. 0..0 0..0 0..0 0..0 (via scan 3) 0..0 (via scan 4) 4.3 RS3 Port RS3 Interface in CooLinkNet is available from the RS3/IO connector. Adapter cable (if provided) will route RS3 signals to DB9 connector according to the table below RS3/IO Pin DB9 Pin Signal Lvel Description 3 3 5 ±V ±V GND TxD Data from CooLinkNet RxD Data to CooLinkNet Ground Maximal length of the RS3 Cable should not exceed 5m. The default CooLinkNet RS3 Port settings are: Baud Rate Data Bits Parity Control Stop Bits Flow Control 9600 8 None None By default RS3 Interface is dedicated for protocol.

Connectivity 4.4 Ethernet CooLinkNet incorporates an IEEE 80.3 compatible 0/00 Mb/s Ethernet port supported via RJ45 connector. Below are main port features. Parameter Value Notes Max Ethernet Cable Length 37m CAT5 twisted pair cable Bit Rate 0/00 Mb/s Supported Ethernet Protocols 0BASE-T/00BASE-TX Protocol Auto-Negotiation Enabled Against Link Partner RJ45 connector comprises Link and Activity indication LEDs used as specified below. LED Color Function Link Led Green ON for good link OFF for no link Activity Led Orange BLINK for Tx/Rx Activity Ethernet interface is used by a number of protocol modules available in CooLinkNet (via IP Server) CoolRemote Network setting of the CooLinkNet are controlled with ifconfig command. 4.4. IP Server IP Server referenced as aserver is a classic TCP/IP socket server. Aserver has the following default characteristics: Maximal number of simultaneous connections Default TCP/IP port 4 00 4.5 RS485 By default terminals MOD A and MOD B (Line L3) are used as an RS485 Interface line for DTE connection. CooLinkNet supports the following RS485 based protocols: ModBus RTU (Slave mode) 4.6 USB CooLinkNet incorporate USB Device port. USB Device port is used for maintenance operations. 4.7 Power CooLinkNet depending on the specific model type can be powered from different power sources: AC/DC adapter via VDC+ and VDC- terminals -4V DC from HVAC or other equipment via VDC+ and VDC- terminals USB Device port

5 3 CooLinkNet provides simple and comprehensive Protocol, based on text (ASCII) strings, representing verbal commands and responses. implemented in CooLinkNet is fully backward compatible with previous versions of CooLink products line, but has a number of significant extensions and improvements mainly aimed to support additional CooLinkNet functionality. can be utilized via RS3 interface (see RS3 Port) or TCP/IP ASCII Server. 5. General Protocol Definitions 5.. Messaging Communication between DTE and CooLinkNet via is based on text (ASCII) strings. Communication example is shown below çcommand ls L L.0 OFF 0C 7C Auto Cool L.03 OFF 0C 4C Low Auto - 0-0 çresponse çexit code çprompt DTE to CooLinkNet CooLinkNet to DTE Command string sent to CooLinkNet must be terminated with <CR (carriage return 0x0D) <LF (line feed 0x0A) sequence or a single <CR character. Strings from CooLinkNet (except prompt character) are always terminated with <CR <LF. Commands are case sensitive and should not contain leading or trailing spaces. The only separator between command name and command parameter(s) is space (0x0) character. Configuration parameter echo (see set command), defines if characters sent to CooLinkNet via RS3 interface are echoed back or not. If echo is not zero - characters are echoed. In case of RS3 interface, prompt character '' is unconditionally sent by CooLinkNet. In case of ASCII Server prompt sending is configurable. 5.. Exit Code CooLinkNet provides Exit Code in verbose or numeric form. Numeric form format is ERROR:N where N is a number in range 0...999. If verbose format is not specified in table below it means error has only numeric format. Numeric 0 3 4 5 6 7 8 9 0 Verbose Bad Format Failed Line Unused Unknown Command Bad Parameter, Boot Required! Description Command executed successfully UID not found UID must be precise Command format is wrong Command execution failed Line is unused Command is unknown Line number is wrong Wrong function Command parameter is wrong Command execution will be effective after reboot

4 5..3 UID UID is used to identify Indoor Unit or a set of Indoor Units. UID has the following format: Line LN Dot. Indoor Number X YY Line is a CooLinkNet HVAC Line number in range L..L4. L* means "any line". In some cases to provide backward compatibility Line can be omitted from the UID. Dot is a separator between Line and Indoor Number. If Line is omitted or has a L* form, dot must also be omitted. Indoor Number is an Indoor Unit number in HVAC system. Indoor Number can be '*' that means "any" Examples: L.0 L.003 L*00 L3.* L4 L* 03 Indoor Unit 0 on line L Indoor Unit 003 on line L Set of Indoor Units 00 on all lines Set of Indoor Units xx on line L3 (L3.00, L3.0,... ) All Indoors on line L4 All Indoors on all lines Similar to L*03 (for backward compatibility only) 5. Commands Reference Synopsis and description of the commands listed below have the following notation: Parameters or parameters group in angle brackets < are mandatory. Parameters or parameters group in square brackets [ ] are optional and can be omitted. The curly braces ( ) are used to denote group inside braces The character between parameters inside brackets means OR. 5.. Configuration Commands set line ifconfig set set [<SETTING <VALUE] set defaults Query or change CooLinkNet setting(s). Without parameters set command will list all supported settings and their values. To change setting use format with <SETTING and <VALUE. Some settings are read only (RO) and can not be changed. set defaults will load default values to all settings <SETTING S/N version Mode RO RO Printed as S/N version Value* X.Y.Z Description CooLinkNet Serial Number CooLinkNet Firmware Version

RW app baud echo verbose aserver port aserver prompt deg RW RW RW RW RW RW application baud rate echo verbose aserver port aserver prompt deg C/F 5 string CooLinkNet Application 00...500 RS3 Interface baud rate. Default: 9600 0 or RS3 Interface echo control. 0 - disabled, - enabled 0 0r Exit Code format. 0 - numeric, - verbose integer aserver TCP port. Default: 00 0 or aserver prompt control C or F Temperature scale Celsius or Fahrenheit * - Bold values are defaults. Disable echo: set echo 0 Change aserver TCP port: set aserver port 345 Load defaults: set defaults line line line <PROPERTY <Ln <VAL Query or change HVAC Lines status and configuration. In format without parameters line command will provide information about current Lines status. Second format is used to change write enabled properties. <PROPERTY master Mode Value R/W simul R/W myid R/W baud R/W Tx Rx TO CS Col NAK RO RO RO RO RO RO Description 0 or CooLinkNet acts as a Master device Notes FUS,MM only integer Simulate given number of Indoor Units. To disable simulation use "0". Simulation is persistent (not disabled after power reset) CooLinkNet Own address on given HVAC Line. For ModBus RTU Line myid is a "Slave Device Address" Configure UART parameters for given Line. Value format is: <BAUD <8 9<N E O< For example: 9600 8N integer Transmitted messages counter Received messages Timeout errors Checksum errors Collision errors NAK errors string Where applicable Printed as Total/Last Last means since previous print

ambtemp WO 0 or Ambient temperature in Slave mode is taken from: 0 - Master device - Indoor return air 6 MM only line L: Unused Tx:0/0 Rx:0/0 TO:0/0 CS:0/0 Col:0/0 NAK:0/0 L: TI U00/G00 Tx:40/40 Rx:0/0 TO:39/39 CS:0/0 Col:0/0 NAK:0/0 L3: CLMB Address:0x50(80) 9600_8N Tx:0/0 Rx:0/0 TO:0/0 CS:0/0 Col:0/0 NAK:0/0 L4: FUS Slave U00/G00 Not Connected Tx:0/0 Rx:0/0 TO:0/0 CS:0/0 Col:0/0 NAK:0/0 Become Slave on Line L4 line master L4 0, Boot Required! Set Line L3 baud rate to 900, 8 data bits, even parity, stop bit line baud L3 900 8E, Boot Required! ifconfig ifconfig ifconfig <PROPERTY <VALUE ifconfig enable disable Query or configure Ethernet network settings. Without parameters, ifconfig command will list current configuration. To change configuration use format with <PROPERTY and <VALUE. Parameter IP can be set to DHCP (DHCP client) or fixed IP number. In case of DHCP - Netmask and Gateway values are provided by DHCP server. By default CooLinkNet is configured for DHCP client operation. CooLinkNet Ethernet module can be enabled or disabled with corresponding command. Query ifconfig MAC : 8:3B:96:FF:FF:FE Link : Up IP : 9.68..09 (DHCP) Netmask: 55.55.55.0 Gateway: 9.68..

7 Configure fixed IP and Gateway ifconfig IP 9.68..0, Boot Required! ifconfig Gateway 9.68..0, Boot Required! Configure DHCP client operation ifconfig IP DHCP Disable Ethernet ifconfig disable, Boot Required! boot boot boot [N] <N omitted - Enter Boot Mode <N = - Reset CooLinkNet 5.. HVAC Status and Control Commands on off cool heat fan dry auto temp fspeed swing filt stat ls query iset feed eco on on [UID] Turn on Indoor Unit(s).

8 Turn on Indoor Unit 0 on line L on L.0 Turn on all Indoor Units on Line L on L* off off [UID] Turn off Indoor Unit(s). Turn on Indoor Unit 0 on line L off L.0 Turn on all Indoor Units on line L off L* cool cool [UID] Set Indoor Unit(s) operation mode to cool. Set Indoor Unit 0 on line L to cool mode cool L.0 Set all Indoor Units on line L to cool mode cool L*

9 heat heat [UID] Set Indoor Unit(s) operation mode to heat. Set Indoor Unit 0 on line L to heat mode heat L.0 Set all Indoor Units on line L to heat mode heat L* fan fan [UID] Set Indoor Unit(s) operation mode to fan. Set Indoor Unit 0 on line L to fan mode fan L.0 Set all Indoor Units on line L to fan mode fan L* dry dry [UID] Set Indoor Unit(s) operation mode to dry. Set Indoor Unit 0 on line L to dry mode dry L.0 Set all Indoor Units on line L to dry mode

0 dry L* auto auto [UID] Set Indoor Unit(s) operation mode to auto. Set Indoor Unit 0 on line L to auto mode auto L.0 Set all Indoor Units on line L to auto mode auto L* temp temp [UID] [±]<TEMP temp [UID] <TEMP.d Change Indoor Unit(s) Set Temperature. In form temp <UID [±]<TEMP <TEMP parameter must be decimal natural number. Command can work in relative or absolute manner. If plus '+' or minus '-' sign precedes <TEMP parameter it's value will be added to or substituted from current Set Temperature value. Otherwise Set Temperature will be set to the given <TEMP value. In form temp <UID <TEMP.d Set Temperature parameter <TEMP.d is a fractal number with 0. precision. (In this case preceding + - are not allowed). If HVAC System does not support 0. precision for the Set Temperature (see table below), the final value will be nearest supported value. AC Type DK ME Set Temperature Precision 0.ºC 0.ºC The deg setting (see set command) defines which temperature scale Celsius or Fahrenheit is used for <TEMP and <TEMP.d parameters value. Set Indoor Unit 0 on line L Set Temperature to 3º

temp L.0 3 Decrease all Indoor Units on line L Set Temperature by º temp L* - Set all Indoor Units on line L Set Temperature to 4.5º temp L* 4.5 fspeed fspeed [UID] <l m h t a Set Indoor Unit(s) Fan Speed to: l - low m - medium h - high t - top a - auto Not all Indoor Units support Fan Speed options listed above. Specific Fan Speeds support depend on specific Indoor Unit capabilities. If requested Fan Speed is not supported by Indoor Unit(s) fspeed command will have no effect. Set Indoor Unit 0 on line L Fan Speed to low fspeed L.0 l Set all Indoor Units on Line L Fan Speed to high fspeed L* h filt filt <UID Reset Filter Sign. Reset Filter Sign on Indoor Unit 0 0n line L on L.0

Reset Filter Sign on all Indoor Units on Line L on L* stat stat [UID] stat [UID] stat3 [UID] stat4 [UID] Get Indoor Unit(s) status list. These commands are deprecated and are not recommended for use in CooLinkNet. They are implemented for backward compatibility only. Detailed description of these commands can be found in the PRM of previous CooLink versions. ls ls [UID] Get Indoor Unit(s) status list. If UID is omitted all Indoor Units connected to CooLinkNet will be listed. Indoor Unit status line has strict format, so that every status field is printed in fixed position. Indoor Unit status line with Celsius temperature scale 03456789034567890345678903456 L.0 OFF 0C 7C High Cool - 0 Indoor Unit status line with Fahrenheit temperature scale 0345678903456789034567890345678 L.0 OFF 0F 7F High Cool - 0 Field UID On/Off Set Temperature Room Temperature Fan Speed Operation Mode Indoor Failure Code Filter Sign Demand Position in string Celsius Fahrenheit 0-5 7-9 - 5-6 9-4-7 9-3 34 36-3 6-8 -4 6-9 3-34 36 38 Values LN.XYY ON,OFF nnc or nnnf nnc or nnnf Low, Med, High, Top, Auto Cool, Heat, Fan, Dry, Auto - no failure, else Indoor Failure Code - or # (Filter Sign) 0 or ls L

L.0 ON L.0 OFF ls L.0 L.0 ON ls L.0 ON L.0 ON L.0 ON L.0 OFF 5C 7C Low Cool 0C 7C High Cool - - 0 5C 7C Low Cool - 5C C 5C 0C Cool Cool Cool Cool - 4C 3C 7C 7C Low Med Low High 3 0 0 query query <UID_STRICT <o m f t h e a s Query one of the operation conditions of given Indoor Unit. <UID_STRICT parameter must define single Indoor Unit in form LN.XYY or XYY (see UID). Resulting value is printed as alpha-numeric value according to the table below. Query o m Operation Condition On/Off Operation Mode f Fan Speed t e Set Temperature Failure Code a h s Ambient Temperature Set Temperature Louver Position Value 0 - Off, - On 0 - Cool - Heat - Auto 3 - Dry 4 - Haux 5 - Fan 0 - Low - Medium - High 3 - Auto 4 - Top Natural 0 - No failure, otherwise failure code same as in ls command Natural 0.0º Precision 0 - No Louver Control a - auto (swing) h - horizontal 3-30º 4-45º 6-60º v - vertical query L.00 o

query 0 query 5 query 7 query query U4 query 0 query 0.50 4 L.00 m L.00 t L.00 a L.00 f L.00 e L.00 e L.00 h swing swing <UID <h v a 3 4 6 Set Indoor Unit(s) louver position to: h - horizontal v - vertical a - auto (swing) 3-30º 4-45º 6-60º Not all Indoor Units support louver position options listed about or have louver position control at all. Louver control is capability of the specific Indoor Unit type. If requested louver position is not supported by Indoor Unit(s), swing command will have no effect. Set Indoor Unit 0 on line L louver to horizontal position swing L.0 h iset iset <UID <SETN iset <UID <SETN <VAL

5 Read/Write Indoor Unit internal parameter (setting). If value not specified the parameter is read otherwise it is written with <VAL and read back. Below is the list of the most useful settings. <SETN 0 Function Ambient Temperature 05 Auto Mode Mode Value Description MM (Mitsubishi Electric) Average R/W Indoor Unit return air sensor 3 Wired Thermostat sensor Enabled R/W Disabled FUS (Fujitsu) 4 Ambient Temperature R/W 48 Ambient Temperature with Wired Thermostat R/W 0 0 Indoor Unit sensor only Depends on setting 48 Indoor Unit and Wired Thermostat sensors Wired Thermostat sensor only The complete up-to-date information about internal parameters and their values should be taken from related manual of the specific HVAC system and Indoor Unit type. Information in above table is provided only for reference. COMPATIBILITY MM TAD FUS Yes N.A. Yes feed feed <Ln [±]<TEMP[.d] This command defines CooLinkNet Own Ambient Temperature (as if it were measured by CooLinkNet itself). Command can work in relative or absolute manner. If plus '+' or minus '-' sign precedes <TEMP parameter it's value will be added to or substituted from current value. Otherwise Own Ambient Temperature will be set to the given <TEMP value. <TEMP can be provided with 0. precision. If <TEMP is zero CooLinkNet will not use Own Ambient Temperature for it's operation. CooLinkNet keeps separate Own Ambient Temperature for each HVAC Line. If <Ln is omitted the first not "Unused" HVAC Line will be taken. Own Ambient Temp usage depends on HVAC Line type. HVAC Line Own Ambient Temp usage MM If non zero, sent to Indoor Unit as Wired Thermostat temperature sensor value FUS TAD Temperature sent to Indoor Unit in i-feel message feed 4.5 L

6 eco eco [UID]<0 Turns off - 0 or on - ECO (economy) mode on Indoor Unit(s). Turn on ECO mode on Indoor Unit 0 on line L eco L.0 COMPATIBILITY MM TAD FUS N.A. N.A. Yes

6 ModBus RTU 7 ModBus RTU CooLinkNet is fully compliant with following ModBus specifications: MODBUS over Serial Line Specification and Implementation Guide V.0 MODBUS application protocol specification V.b ModBus Interface Physical Layer CooLinkNet physical connection to ModBus is Two-Wire EIA/TIA-485 standard interface via 485-A and 485-B terminals, recommended by ModBus specification. On such W-bus, at any time only one driver has the right for transmitting thus a ModBus communication is always initiated by the master. CooLinkNet will never transmit without receiving a request from master. A number of CooLinkNet devices can be connected to single W-bus. Each CooLinkNet in this case must have unique ModBus slave address (command line myid <Ln <VAL). ModBus RTU Frame Format CooLinkNet by default supports ModBus RTU Transmission Mode with following frame format: Baud Rate Start Bits Data Bits Parity Stop Bits 9600 8 No Frame format can be changed with line baud <Ln <VAL command. Supported MODBUS Functions Function Code 03 (0x03) 06 (0x06) 6 (0x0) 43 4 (0xB 0x0E) Function Description Read Holding Registers Write Single Register Write Multiple registers Read Device Information

ModBus RTU 8 6. ModBus Address Map Holding Reg Address* Description Read Write Hex Dec 000 000 0003 0004 3 4 CooLinkNet Internals CooLinkNet Version CooLinkNet S/N CooLinkNet Model ModBus Address 0005 5 Reset W 000 6 R 00 00 7 33 000 00 00 003 56 57 58 59 Internal State 0 - Not Connected to RC line - Connecting - Connected as single RC 3 - Connected as Master RC. Detected Slave RC 4 - Connected as Slave RC 0 - Master Mode (default) - Slave Mode UID Indoor Status and Control On/Off 0-Off, -On Operation Mode (see Mode Encoding ) Fan Speed (see Fan Speed Encoding ) Set Point C 004 005 60 6 Failure Code Indoor Ambient Temperature C 00 7 Feed Temperature C Required** R R R RW RW R R R R R Notes Version Model Major*00 + Minor*0 + SubMinor Lower 6 bit Two ASCII characters ModBus Address change is effective only after reset - Enter Boot mode CooLinkNet does not respond to the write request into this register - Reset 0.0.4 MSB - X, LSB - YY W W W W R R MSB - Integer Part LSB - Fraction Part * 0.0 RW *On the ModBus wire registers address range starts from 0 and thus register address is sent decremented (-). ** If Version or Model is not specified, it means that register is supported in any CooLinkNet version and/or model. N.A. means future option. Mode Encoding Cool 0 Heat Auto Dry 3 Haux 4 Fan 5 Fan Speed Encoding Low 0 Medium High Auto 3 Top 4