IntesisBox MH-RC-MBS-1 User Manual Download Page 1

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IntesisBox

MH-RC-MBS-1

v.0.14

Modbus RTU (EIA-485) Interface for Mitsubishi Heavy Industries air
conditioners.

User Manual

Issue Date: 04/2019

r6.3 EN

Order Codes:

MH-RC-MBS-1:

Modbus

RTU Interface for Mitsubishi Heavy Industries air conditioners

Summary of Contents for MH-RC-MBS-1

Page 1: ...S 1 v 0 14 Modbus RTU EIA 485 Interface for Mitsubishi Heavy Industries air conditioners User Manual Issue Date 04 2019 r6 3 EN Order Codes MH RC MBS 1 Modbus RTU Interface for Mitsubishi Heavy Industries air conditioners ...

Page 2: ...s 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 Sp...

Page 3: ...on 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 10 4 2 3 Considerations on Temperature Registers 11 4 2 4 Special behavior Center Remote 13 4 3 DIP switch Configuration Interface 15 4 4 Implemented Functions 18 4 5 Device LED indicator 18 4 6 EIA 48...

Page 4: ...ect connection to Modbus RTU EIA 485 networks Up to 63 MH RC MBS 1 devices can be connected in the same network MH 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 MH RC MBS 1 controlling them as one not individually Configuration from both on board DIP switches and Modbus RTU Total Control and Supervision Real states of the AC ...

Page 5: ...ller available Connect the gateway as Slave in parallel with the wired remote controllers Controller acts as Master No remote controller available Connect the gateway directly to the XY bus of the indoor unit as Master when there is no Mitsubishi Heavy Industries Remote Controller Maximum XY bus length is 600 m 1 968 5 ft The bus has no polarity sensitivity Important If a wired remote controller o...

Page 6: ... 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 XY bus between the interface and the AC indoor unit following the instructions of the diagram Screw each bare cable end in the corresponding XY terminals of each device 4 Connect the EIA 485 bus to the connector EIA485...

Page 7: ...pports 8N1 communication 8 data bits no parity and 1 stop bit 4 2 Modbus Registers All registers are type 16 bit unsigned Holding Register and they use the 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 0 Auto 1 Heat 2 Dry 3 Fan 4 Cool 2 3 R W AC unit...

Page 8: ...nit Operation Time 0 65535 hours Counts the time the AC unit is in On state 10 11 R AC unit Alarm Status 0 No alarm condition 1 Alarm condition 11 12 R Error Code 6 0 No active error 65532 4 Initialization process around 2min before normal operation starts This error appears in case that MH RC MBS 1 is set as Master 65535 1 Error in the communication of MH RC MBS 1 or Remote Controller with the AC...

Page 9: ...8 0 Remocon unlock Center Remote 1 Remocon lock On Off Center 2 Remocon lock All Center 3 Remocon Only Remote 55 56 R W Under voltage counter 5 0 300 hours 60 61 R Outdoor Intake temperature 2 3 4 32768d Initialization value No temperature s value is being provided outdoor No virtual temperature is applied Any other ºC x10ºC ºF 65 66 R Input reference temperature 2 3 4 32768 Initialization value N...

Page 10: ...19200bps 38400bps 57600bps 76800bps 115200bps 15 16 R Modbus Slave Address 1 63 21 22 R Max number of fan speeds 45 46 W Error reset 1 Reset 48 49 R Switch value 49 50 R Device ID 0x0F00 50 51 R Software version 81 82 R Error address Provides the indoor unit number which is providing error 99 100 W Reset 1 Reset While the initialization is ongoing some Modbus registers will indicate an undetermine...

Page 11: ... not allow on devices like MH RC MBS 1 to provide directly temperature to be used as a reference of the control loop of the AC indoor unit In order to overcome this limitation and enable the usage of an external temperature sensor i e from Modbus side MH RC MBS 1 applies the following mechanism only if external temperature s reference is being used o After a couple of values have been entered in t...

Page 12: ...esired to use the temperature s reading from the Remote Control as the external temperature reference Tu register 22 33 the Remote Controller must be configured as Master and the Mitsubishi Heavy Industries AC indoor unit must have the option thermostat sensor in the Remote Controller as activated This configuration is done via a Mitsubishi Heavy Industries Remote Controller connected to the indoo...

Page 13: ... Controller or the MH RC MBS 1 1 Remote lock On Off Center The indoor unit is being controlled by a BMS Building Management System controlled across to Modbus RTU Master device and it can only be managed by the BMS In this situation the MH RC MBS 1 is disabled for the On Off function 2 Remote lock All Center The indoor unit is being controlled by a BMS Building Management System controlled from Mo...

Page 14: ...esisBox is a registered trademark of Intesis Software SLU URL Email Phone http www intesisbox com info intesisbox com 34 938047134 14 23 2 Remote Remote The indoor unit is not being controlled by any BMS Building Management System controlled from Modbus RTU Master device It can be managed from the Remote Controller or the MH RC MBS 1 ...

Page 15: ...llowing locations The following tables apply to the interface s configuration through DIP switches SW1 AC indoor unit s features SW1 P1 4 Description Slave A Mitsubishi Heavy Industries Controller must be present in XY bus configured as Master Default value Master Mitsubishi Heavy Industries Controller not needed in XY bus If it exists it must be configured as Slave Indoor unit has 1 Fan Speed Ind...

Page 16: ...cidegrees x10 temperature magnitude ºC ºF and EIA 485 termination 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 v...

Page 17: ...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 18: ...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 19: ...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 MH RC MBS 1 device includes an on board terminator resistor of 12...

Page 20: ...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 XY bus Plug in screw terminal block 2 poles X...

Page 21: ...s Software SLU URL Email Phone http www intesisbox com info intesisbox com 34 938047134 21 23 6 List of supported AC Unit Types A list of Mitsubishi Heavy Industries indoor unit model s references compatible with MH RC MBS 1 and its available features can be found on this link https www intesisbox com intesis support compatibilities IntesisBox_MH RC xxx 1_AC_Compatibility pdf ...

Page 22: ...rrent error 35 E35 Cooling overload operation 36 E36 Discharge pipe temperature error 37 E37 Outdoor heat exchanger temperature thermistor anomaly 38 E38 Outdoor Ambient air temperature thermistor anomaly 39 E39 Discharge pipe temperature thermistor anomaly 40 E40 High pressure error 41 E41 Power transistor overheat 42 E42 Current cut 43 E43 Excessive number of indoor units connected excessive tot...

Page 23: ... is subject to change without notice IntesisBox is a registered trademark of Intesis Software SLU URL Email Phone http www intesisbox com info intesisbox com 34 938047134 23 23 In case to detect an error code not listed contact your closest Mitsubishi Heavy Industries technical support service ...

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