IntesisBox DK-AC-MBS-1 User Manual Download Page 1

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IntesisBox

DK-RC-MBS-1

v.1.6

Modbus RTU (EIA-485) Interface for Daikin air conditioners.
Compatible with VRV and SKY line air conditioners commercialized
by Daikin.

User Manual

Issue Date: 12/2017

r3.3 EN

Order Codes:

DK-RC-MBS-1:

Modbus

RTU Interface for Daikin air conditioners

Summary of Contents for DK-AC-MBS-1

Page 1: ... RTU EIA 485 Interface for Daikin air conditioners Compatible with VRV and SKY line air conditioners commercialized by Daikin User Manual Issue Date 12 2017 r3 3 EN Order Codes DK RC MBS 1 Modbus RTU Interface for Daikin air conditioners ...

Page 2: ...this document is subject to change without notice No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or any means electronic or mechanical including photocopying and recording for any purpose other than the purchaser s personal use without the written permission of Intesis Software S L U Intesis Software S L U Milà i Fontanals 1 bis 08700 Igualada...

Page 3: ...n to the EIA 485 bus 6 3 Quick Start Guide 6 4 Modbus Interface Specification 7 4 1 Modbus physical layer 7 4 2 Modbus Registers 7 4 2 1 Control and status registers 7 4 2 2 Configuration Registers 9 4 2 3 Considerations on Temperature Registers 9 4 3 DIP switch Configuration Interface 11 4 4 Implemented Functions 15 4 5 Device LED indicator 15 4 6 EIA 485 bus Termination resistors and Fail Safe B...

Page 4: ...t on some models of AC External power not required Direct connection to Modbus RTU EIA 485 networks Up to 63 DK RC MBS 1 devices can be connected in the same network DK RC MBS 1 is a Modbus slave device Direct connection to the AC indoor unit Up to 16 AC indoor units can be connected to DK RC MBS 1 controlling them as one not individually Configuration from both on board DIP switches and Modbus RT...

Page 5: ...llowing ones details in Figure 2 1 Wired remote control available Connect the gateway as Slave in parallel with the wired remote controllers Controller acts as Master Infrared remote control available Connect the gateway as Master in parallel with the infrared remote controller Infrared Remote Control as Slave No remote control available Connect the gateway directly to the P1P2 bus of the indoor u...

Page 6: ...e next to the AC indoor unit wall mounting following the instructions of the diagram below or install it inside the AC indoor unit respect the safety instructions given 3 Connect the P1P2 bus between the interface and the AC indoor unit following the instructions of the diagram Screw each bare cable end in the corresponding P1P2 terminals of each device 4 Connect the EIA 485 bus to the connector E...

Page 7: ...dard Modbus big endian notation 4 2 1 Control and status registers Register Address protocol address Register Address PLC address R W Description 0 1 R W AC unit On Off 0 Off 1 On 1 2 R W AC unit Mode 1 0 Auto 1 Heat 2 Dry 3 Fan 4 Cool 2 3 R W AC unit Fan Speed 1 1 Low 2 Mid 3 High 3 4 R W AC unit Vane Position 1 1 Position 1 Horizontal 2 Position 2 Horizontal 3 Position 3 Medium 4 Position 4 Vert...

Page 8: ...his document 22 23 R W Indoor unit s ambient temperature from external sensor at Modbus side 1 2 3 6 7 32768 Initialization value No temperature is being provided from an external sensor Any other ºC x10ºC ºF 23 24 R AC Real temperature setpoint 1 2 3 6 When no external temperature is provided this read only register will have the same value as register 5 PLC addressing In all cases it will show t...

Page 9: ...ture setpoint value as this register but only will happen when no AC unit s external reference is provided from DK RC MBS 1 see detail for register 22 23 below AC unit temperature reference R register 5 in Protocol address register 6 in PLC address This register reports the temperature that is currently used by the Daikin indoor unit as the reference of its own control loop Depending on the config...

Page 10: ...ly adjust the temperature setpoint required of the AC indoor unit to 25ºC 2ºC 27ºC o In general DK RC MBS 1 is constantly applying the Virtual Temperature formula SAC Su Tu T AC Where SAC setpoint value currently applied to the indoor unit Su setpoint value written at Modbus side register 4 5 Tu external temperature reference written at Modbus side register 22 23 TAC ambient temperature that the i...

Page 11: ...h is being used by the indoor unit it is also includes the temperature setpoint that will be shown by an additional remote controller from Daikin connected to the indoor unit if it is present on the system Moreover notice that temperature s values of all these four registers are expressed according to the temperature s format configured through its onboard DIP Switches See 4 3 DIP switch Configura...

Page 12: ...RC Controller not needed in P1P2 bus If it exists it must be configured as Slave Master of Operation Mode For VRV only Default value 11 Slave of Operation Mode For VRV only Reserved not used Default value Reserved not used Daikin Indoor Unit ambient temperature reading Default value 12 Daikin Remote Controller ambient temperature reading Table 4 1 SW1 AC indoor unit s features SW3 SW4 Baud rate co...

Page 13: ... resistor Table 4 3 SW4 Temperature and termination resistor configuration SW4 P1 2 4 Description Temperature values in Modbus register are represented in degrees x1 Default value Temperature values in Modbus register are represented in decidegrees x10 Temperature values in Modbus register are represented in Celsius degrees Default value Temperature values in Modbus register are represented in Fah...

Page 14: ...ave address Table 4 4 SW3 Modbus slave address Add SW3 P1 6 Add SW3 P1 6 Add SW3 P1 6 Add SW3 P1 6 Add SW3 P1 6 0 13 26 39 52 1 14 27 40 53 2 15 28 41 54 3 16 29 42 55 4 17 30 43 56 5 18 31 44 57 6 19 32 45 58 7 20 33 46 59 8 21 34 47 60 9 22 35 48 61 10 23 36 49 62 11 24 37 50 63 12 25 38 51 ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON ON O...

Page 15: ...is being used in case of writing 4 5 Device LED indicator The device includes two LED indicators to show all the possible operational states In the following table there are written the indicators which can be performed and their meaning L1 green LED Device status LED indication ON OFF Period Description During not normal operation LED blinking 500ms ON 500ms OFF Communication error During normal ...

Page 16: ...ivers which are listening the bus when all the transmitters outputs are in three state high impedance it is also required a fail safe biasing mechanism This mechanism provides a safe status a correct voltage level in the bus when all the transmitters outputs are in three state This mechanism must be supplied by the Modbus Master The DK RC MBS 1 device includes an on board terminator resistor of 12...

Page 17: ... Wiring for low voltage signals For terminal solid wires or stranded wires twisted or with ferrule 1 core 0 5mm2 2 5mm2 2 cores 0 5mm2 1 5mm2 3 cores not permitted Stock Humidity 95 RH non condensing Modbus RTU port 1 x Serial EIA485 Plug in screw terminal block 2 poles A B Compatible with Modbus RTU EIA 485 networks Isolation voltage 1500 VDC AC unit port 1 x P1P2 bus Plug in screw terminal block...

Page 18: ... of Intesis Software SLU URL Email Phone http www intesisbox com info intesisbox com 34 938047134 18 23 6 List of supported AC Unit Types A list of Daikin indoor unit model s references compatible with DK RC MBS 1 and its available features can be found on this link https www intesisbox com intesis support compatibilities IntesisBox_DK RC xxx 1_AC_Compatibility pdf ...

Page 19: ...rmistor system error 38 C5 Heat exchanger 1 Gas pipe thermistor system error 39 C6 Sensor system error of fan motor locked overload 40 C7 Sensor system of swing flag motor error 41 C8 Sensor system of over current of AC input 42 C9 Suction air thermistor error 43 CA Discharge air thermistor system error 44 CH Contamination sensor error 45 CC Humidity sensor error 46 CJ Remote control thermistor er...

Page 20: ...arge pipe thermistor system error 101 J4 Low pressure equivalent saturated temperature sensor system error 102 J5 Outdoor Suction pipe thermistor system error 103 J6 Unit Heat exchanger 1 thermistor system error 104 J7 Heat exchanger 2 thermistor system error 105 J8 Oil equalizer pipe or liquid pipe thermistor system error 106 J9 Double tube heat exchanger outlet or gas pipe thermistor system erro...

Page 21: ...e system Communication error between other BS unit and indoor outdoor unit 155 UA System Combination error of indoor BS outdoor unit model quantity etc setting error of spare parts PCB when replaced 156 UH Improper connection of transmission wiring between outdoor and outdoor unit outside control adaptor 157 UC Centralized address duplicated 158 UJ Attached equipment transmission error 159 UE Comm...

Page 22: ... sensor error 262 35 Outdoor air temperature sensor error 263 36 Remote controller temperature sensor error 267 3A Water leakage sensor 1 error 268 3H Water leakage sensor 2 error 269 3C Dew condensation error 339 M2 Centralized remote controller PCB error 345 M8 Communication error between centralized remote control devices 347 MA Centralized remote control devices inappropriate combination 349 M...

Page 23: ...defines the working mode of outdoor unit the first indoor unit to be turned On is the one which is going to define and control the mode In a VRV system there is only one device acting as Master of Mode If more than one is configured in this way the system is not going to work properly The configuration will be determined by the Remote Controller of Daikin The unit which controls the Operation mode...

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