Daikin FHQ125CAVEB Specifications

Design guideModbus Interface DIIIEKMBDXA7V1

4P357732-1 – 2014.04 Page 9 of 58 Following modelranges can only be combined in a setup with at least one VRV unit or with at least one other DIII

4P357732-1 – 2014.04 Page 10 of 58 1.4.1 Overview of compatible Daikin models with DIII connection (detail) description Brand model range Suppo

4P357732-1 – 2014.04 Page 11 of 58 description Brand model range Supported models VRV (F1,F2) Corner cassette Daikin FXKQ FXKQ25MVE FXKQ32MVE FXK

4P357732-1 – 2014.04 Page 12 of 58 description Brand model range Supported models HRV Heat reclaim ventilation Daikin VAM…FA VAM1000FA5VE1 VAM15

4P357732-1 – 2014.04 Page 13 of 58 description Brand model range Supported models Heating Daikin Altherma Flex - small indoor Daikin EKHVM RD/YD.

4P357732-1 – 2014.04 Page 14 of 58 1.5 Overview of compatibilty with other DIII centralised control equipment Intelligent Touch Manager Interfa

4P357732-1 – 2014.04 Page 15 of 58 2. Modbus communication 2.1 Modbus Interface DIII settings Communication protocol Modbus RTU (according to “Mod

4P357732-1 – 2014.04 Page 16 of 58 2.2 Communication format 2.2.1 Function format (1) Read Input Registers (0x04) [Function] Read values of input

4P357732-1 – 2014.04 Page 17 of 58 (2) Preset Single Register (0x06) [Function] Write a value to a holding register. In case of broadcast, the val

4P357732-1 – 2014.04 Page 18 of 58 (4) Exception response In case the query message is faulty, the Modbus Interface DIII will reply an exception

4P357732-1 – 2014.04 Page 1 of 58 Design guide Modbus Interface DIII EKMBDXA7V1 Table of Contents Safety Precautions ...

4P357732-1 – 2014.04 Page 19 of 58 2.2.2 Character format Each byte of a message is sent as character data as follows. A character consists of st

4P357732-1 – 2014.04 Page 20 of 58 2.3 Communication procedure 2.3.1 System initialisation At startup: - All input registers have values 0. Aft

4P357732-1 – 2014.04 Page 21 of 58 2.3.2 Monitor and operate units from the BMS Input registers of each DIII unit: 30001 and higher The input reg

4P357732-1 – 2014.04 Page 22 of 58 Step by step explanation of the required copy of the BMS. Below is an example for On/Off operation. Note: The

4P357732-1 – 2014.04 Page 23 of 58 4. The unit is switched Off by the user interface. 5. The BMS gets the status of the input register (1) and co

4P357732-1 – 2014.04 Page 24 of 58 Attention: In case the BMS does not copy (see 5.) and sends an On command to the unit. Then the requested On co

4P357732-1 – 2014.04 Page 25 of 58 2.3.3 Other DIII devices exist in the same system (See 1.5 Overview of compatibilty with other DIII centralise

4P357732-1 – 2014.04 Page 26 of 58 3. Modbus registers Input registers 30001 till 30009 General Modbus Interface DIII status (incl. Detected DIII

4P357732-1 – 2014.04 Page 27 of 58 Input register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied In

4P357732-1 – 2014.04 Page 28 of 58 Input register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied Ro

4P357732-1 – 2014.04 Page 2 of 58 5. Modbus Interface DIII test operation ...

4P357732-1 – 2014.04 Page 29 of 58 Input register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied Le

4P357732-1 – 2014.04 Page 30 of 58 Input register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied On

4P357732-1 – 2014.04 Page 31 of 58 3 - 2 Forced off status 0: none 1: Forced off or Indoor status of “Forced off” of digital input T1-T2 or by c

4P357732-1 – 2014.04 Page 32 of 58 Input register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied Ro

4P357732-1 – 2014.04 Page 33 of 58 Input register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied Ro

4P357732-1 – 2014.04 Page 34 of 58 Input register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied Le

4P357732-1 – 2014.04 Page 35 of 58 Input register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied Ve

4P357732-1 – 2014.04 Page 36 of 58 Input register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied Er

4P357732-1 – 2014.04 Page 37 of 58 3.2 Holding registers Holding register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ cont

4P357732-1 – 2014.04 Page 38 of 58 Holding register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied

4P357732-1 – 2014.04 Page 3 of 58 Safety Precautions Before performing design, construction, or maintenance thoroughly, read the “Safety Precauti

4P357732-1 – 2014.04 Page 39 of 58 (note: Fan control flag must be set to value 6) Note: The BMS needs to copy input register value: 32001 (1-00)…

4P357732-1 – 2014.04 Page 40 of 58 Holding register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied

4P357732-1 – 2014.04 Page 41 of 58 Holding register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied

4P357732-1 – 2014.04 Page 42 of 58 Holding register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied

4P357732-1 – 2014.04 Page 43 of 58 Holding register VRV Sky-air HRV Split VRV hydrobox LT & HT Air curtains ERQ control box Heating Applied

4P357732-1 – 2014.04 Page 44 of 58 button On Lock 1: Disable On/off lock (Note: There is no related input register with actual value) Additional

4P357732-1 – 2014.04 Page 45 of 58 4. Software of Modbus Interface DIII 4.1 Software releases Software ID & PCB label Software published

4P357732-1 – 2014.04 Page 46 of 58 In case PC USB cable EKPCCABx is used for the first time on a PC, it is required to install the following USB d

4P357732-1 – 2014.04 Page 47 of 58 4.2.2 Method 1) Update with the PC USB cable EKPCCAB3. Instructions: 1. Make sure that the Modbus Interfac

4P357732-1 – 2014.04 Page 48 of 58 7. Fill in the model name "EKMBDXA7V1" in the filter box and select the available software. 8. Foll

4P357732-1 – 2014.04 Page 4 of 58 1.2 Limitations The number of control commands per indoor unit is limited to 7000 per year. If the BMS controls

4P357732-1 – 2014.04 Page 49 of 58 4.2.3 Method 2) Update with a USB/RS485 converter. Instructions: 1. Make sure that the Modbus Interface

4P357732-1 – 2014.04 Page 50 of 58 8. Fill in the model name "EKMBDXA7V1" in the filter box and select the latest available software. 9

4P357732-1 – 2014.04 Page 51 of 58 5. Modbus Interface DIII test operation 5.1 Introduction To test the operation of the Modbus Interface DIII s

4P357732-1 – 2014.04 Page 52 of 58 5.3 Test Operation Procedure Following test examples are explained by using “Modbus poll” version 6.0.2 5.3.1

4P357732-1 – 2014.04 Page 53 of 58 3. Prepare register groups as following examples: Example Read input registers 30001 till 30008 Example Read

4P357732-1 – 2014.04 Page 54 of 58 Example Read holding registers 42001 till 42003 (for set point select “Format > Signed)

4P357732-1 – 2014.04 Page 55 of 58 5.3.2 Start reading registers groups Select “Connection > Connect F3” (Example) After making the correct s

4P357732-1 – 2014.04 Page 56 of 58 5.3.3 Set a holding register To change a holding register, proceed as follows: Double click on value to modif

4P357732-1 – 2014.04 Page 57 of 58 6. Trouble shooting Problem Possible causes Required actions No Modbus communication No correct Modbus address

4P357732-1 – 2014.04 Page 58 of 58 7. Revision of the document 2014.04 New

4P357732-1 – 2014.04 Page 5 of 58 1.3.1 Dimensions and field wiring Refer to installation manual

4P357732-1 2014.04Copyright 2014 Daikin

4P357732-1 – 2014.04 Page 6 of 58 1.3.2 Wiring diagram 1.3.3 LED meaning During normal operation (application is running): H1P: DIII communic

4P357732-1 – 2014.04 Page 7 of 58 1.3.6 Dipswitch meaning Attention: Dipswitch on/off status is detected during power on of the PCB only. Dipswit

4P357732-1 – 2014.04 Page 8 of 58 1.4 Overview of compatible Daikin units ranges with DIII connection For details see chapter “1.4.1 Overview of c