IntesisBox ME-AC-MBS-1 User Manual
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IntesisBox ME-AC-MBS-1 User Manual

Modbus rtu eia-485 interface for mitsubishi electric air conditioners. compatible with all models of domestic & mr.slim lines
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IntesisBox
®
ME-AC-MBS-1
v.2.1
Modbus
RTU
(EIA-485)
Interface
for
Mitsubishi
Electric
air
conditioners. Compatible with all models of Domestic & Mr.Slim
lines.
User Manual
Issue Date: 11/2017
r21 EN
Order Codes:
ME-AC-MBS-1: Modbus RTU Interface for Mitsubishi Electric air conditioners

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Summary of Contents for IntesisBox ME-AC-MBS-1

  • Page 1 IntesisBox ® ME-AC-MBS-1 v.2.1 Modbus (EIA-485) Interface Mitsubishi Electric conditioners. Compatible with all models of Domestic & Mr.Slim lines. User Manual Issue Date: 11/2017 r21 EN Order Codes: ME-AC-MBS-1: Modbus RTU Interface for Mitsubishi Electric air conditioners...
  • Page 2 ME-AC-MBS-1 User’s Manual r21 EN © Intesis Software S.L.U. 2017. All Rights Reserved. Information in 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.

  • Page 3: Table Of Contents

    ME-AC-MBS-1 User’s Manual r21 EN INDEX Presentation ......................4 Connection ......................5 Connect to the AC indoor unit ................5 Connection to the EIA-485 bus ................5 Quick Start Guide ....................6 Modbus Interface Specification ................7 Modbus physical layer..................7 Modbus Registers ....................

  • Page 4: Presentation

    • • Controller • ME-AC-MBS-1 Up to 63 IntesisBox devices can be installed in the same Modbus RTU bus. However, the installation of Modbus Repeaters may be required. 4/18 © Intesis Software S.L.U. - All rights reserved http://www.intesisbox.com This information is subject to change without notice Email info@intesisbox.com...

  • Page 5: Connection

    CN105 of the AC unit's electronic circuit. You can place the ME-AC-MBS-1 inside or outside the AC indoor unit depending on your needs. Remember that the ME-AC-MBS-1 must also be connected to the Modbus RTU EIA-485 network.

  • Page 6: Quick Start Guide

    4. Connect the EIA-485 bus to the interface’s EIA485 connector. 5. Close the AC indoor unit. 6. Check the DIP-Switch configuration of the IntesisBox interface and make sure it matches the current installation’s parameters (see section 4.3). By default, the interface is set to: Modbus Slave Address ...

  • Page 7: Modbus Interface Specification

    4. Modbus Interface Specification 4.1 Modbus physical layer ME-AC-MBS-1 implements a Modbus RTU (Slave) interface, to be connected to an EIA-485 line. It performs 8N2 communication (8 data bits, no parity and 2 stop bit) with several available baud rates (2400 bps, 4800 bps, 9600 bps -default-, 19200 bps, 38400 bps, 57600 bps, 76800 bps and 115200 bps).
  • Page 8 65535 (-1 if it is read as signed value): ▪ Status of AC error has not been obtained yet (initialization value). Error in the communication of ME-AC-MBS-1 with the AC unit. Any other error present, see the table at the ▪...

  • Page 9: Configuration Registers

    ME-AC-MBS-1 User’s Manual r21 EN 4.2.2 Configuration Registers Register Address Register Address Description (protocol address) (PLC address) AC Model “Open Window” switch-off timeout 0..30 (minutes) ▪ Factory setting: 30 (minutes) ▪ Modbus RTU baud-rate 2400bps ▪ 4800bps ▪ 9600bps (Default) ▪...

  • Page 10: Considerations On Temperature Registers

    This register allows us to provide an external temperature’s sensor from the Modbus side. Mitsubishi indoor unit does not allow, on devices like ME-AC-MBS-1, to provide directly a temperature to be used as a reference of the control loop of the AC indoor unit.
  • Page 11 As it has been detailed on the previous point, the real temperature setpoint in the indoor unit and the temperature setpoint requested from ME-AC-MBS-1 might differ (when a value in register 22/23 – “external temperature reference” is entered). This register always informs about the current temperature setpoint which is being used by the indoor unit –...

  • Page 12: Dip-Switch Configuration Interface

    User’s Manual r21 EN 4.3 DIP-switch Configuration Interface All the configuration values on ME-AC-MBS-1 can be written and read from Modbus interface. Otherwise, some of them can also be setup from its on-board DIP-switch interface. The device has DIP-switches SW1, SW3 and SW4 on the following locations:...
  • Page 13 ME-AC-MBS-1 User’s Manual r21 EN SW3/SW4 – Baud rate configuration SW3-P7..8 SW4-P3 Description 2400bps 4800bps 9600bps (Default value) 19200bps 38400bps 57600bps 76800bps 115200bps Table 4.2 SW3-SW4: Modbus baud rate SW4 – Degrees/Decidegrees (x10), temperature magnitude (ºC/ºF) and EIA-485 termination resistor.
  • Page 14 ME-AC-MBS-1 User’s Manual r21 EN SW3 – Modbus Slave address SW3-P1..6 SW3-P1..6 SW3-P1..6 SW3-P1..6 SW3-P1..6 Table 4.4 SW3: Modbus slave address 14/18 © Intesis Software S.L.U. - All rights reserved http://www.intesisbox.com This information is subject to change without notice Email info@intesisbox.com...

  • Page 15: Implemented Functions

    This mechanism must be supplied by the Modbus master. The ME-AC-MBS-1 device includes an on-board terminator resistor of 120Ω that can be connected to the EIA-485 bus by using DIP-switch SW4. Some Modbus RTU EIA-485 Master devices can provide also internal 120Ω terminator resistor and/or fail-safe biasing mechanism (check the technical documentation of the Master device connected to the EIA-485 network in each case).

  • Page 16: Electrical And Mechanical Features

    ME-AC-MBS-1 User’s Manual r21 EN 5. Electrical and Mechanical features Plastic, type PC (UL 94 V-0) Net dimensions (dxwxh): Operation Enclosure 0ºC to +60ºC 93 x 53 x 58 mm / 3.7” x 2.1” x 2.3” Temperature Color: Light Grey. RAL 7035...

  • Page 17: List Of Supported Ac Unit Types

    ME-AC-MBS-1 User’s Manual r21 EN 6. List of supported AC Unit Types. A list of Mitsubishi Electric indoor unit model’s references compatible with ME-AC-MBS-1 and its available features can be found on this link: http://www.intesisbox.com/intesis/support/compatibilities/IntesisBox_ME-AC-xxx-1_AC_Compatibility.pdf 17/18 © Intesis Software S.L.U. - All rights reserved http://www.intesisbox.com...

  • Page 18: Error Codes

    ME-AC-MBS-1 User’s Manual r21 EN 7. Error Codes Error Code Description No active error 1102 Discharge Temperature high 1108 Internal thermostat detector working (49C) 1110 Outdoor unit fail 1300 Pressure low 1302 Pressure high (High pressure probe working 63H) 1503...

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