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Related Manuals for IntesisBox MH-RC-MBS-1
Summary of Contents for IntesisBox MH-RC-MBS-1
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Page 1: User Manual
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... - Page 2 MH-RC-MBS-1 User’s Manual r6.3 EN © Intesis Software S.L.U. 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.
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Page 3: Table Of Contents
MH-RC-MBS-1 User’s Manual r6.3 EN INDEX Presentation ......................4 Connection ......................5 Connect to the AC indoor unit ................5 Connection to the EIA-485 bus ................6 Quick Start Guide ....................6 Modbus Interface Specification ................7 Modbus physical layer..................7 Modbus Registers .................... -
Page 4: Presentation
Controller • MH-RC-MBS-1 Up to 63 IntesisBox devices can be installed in the same Modbus RTU bus. However, depending on the configured speed, the installation of Modbus Repeaters may be required 4/23 © Intesis Software S.L.U. - All rights reserved http://www.intesisbox.com... -
Page 5: Connection
Modbus RTU EIA-485 network. 2.1 Connect to the AC indoor unit The MH-RC-MBS-1 connects directly to the Mitsubishi Heavy Industries XY Bus, which is not provided within the interface. Depending on which controllers are available, the recommended connection’... -
Page 6: Connection To The Eia-485 Bus
User’s Manual r6.3 EN 2.2 Connection to the EIA-485 bus Connect the EIA-485 bus wires to the plug-in terminal block of MH-RC-MBS-1 and keep the polarity on this connection (A+ and B-). Make sure that the maximum distance to the bus is 1,200 meters (3,937 ft). -
Page 7: Modbus Interface Specification
4. Modbus Interface Specification 4.1 Modbus physical layer MH-RC-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: Error Code
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 unit. - Page 9 MH-RC-MBS-1 User’s Manual r6.3 EN Register Address Register Address Description (protocol address) (PLC address) 2,3,4,7 AC Real temperature setpoint When the mechanism for “Virtual ▪ temperature” is not being applied, the value will be the one in the register 5 (PLC addressing).
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Page 10: Configuration Registers
MH-RC-MBS-1 User’s Manual r6.3 EN 4.2.2 Configuration Registers Register Address Register Address Description (protocol address) (PLC address) “Open Window” switch-off timeout 0..30 (minutes) ▪ Factory setting: 30 (minutes) ▪ Modbus RTU baud-rate 2400bps ▪ 4800bps ▪ 9600bps (Default) ▪ 19200bps ▪... -
Page 11: Considerations On Temperature Registers
24ºC in the indoor unit, it will apply a final setpoint of 24ºC + 2ºC = 26ºC). At this moment, each time that MH-RC-MBS-1 detects a change on the ambient temperature reported by the indoor unit (register 5/6), it will also change the required setpoint, in order to keep the temperature required by the user at any time. - Page 12 Mitsubishi Heavy Industries authorized installers while the AC is being installed. When MH-RC-MBS-1 is set as “Master” of XY bus, the external temperature’s sensor connected to Modbus RTU EIA-485 network provides directly the value...
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Page 13: Special Behavior - Center/Remote
2: Remote lock All (Center). The indoor unit is being controlled by a BMS (Building Management System controlled from Modbus RTU Master device) and it can only be managed by the BMS. In this case, the MH-RC-MBS-1 keeps its status as disabled, like when the device disablement register (7/8) is set to 1. - Page 14 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. 14/23 © Intesis Software S.L.U. - All rights reserved http://www.intesisbox.com...
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Page 15: Dip-Switch Configuration Interface
User’s Manual r6.3 EN 4.3 DIP-switch Configuration Interface All the configuration values on MH-RC-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 16 MH-RC-MBS-1 User’s Manual r6.3 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 17 MH-RC-MBS-1 User’s Manual r6.3 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 17/23 © Intesis Software S.L.U. - All rights reserved http://www.intesisbox.com This information is subject to change without notice Email info@intesisbox.com...
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Page 18: Implemented Functions
MH-RC-MBS-1 User’s Manual r6.3 EN 4.4 Implemented Functions MH-RC-MBS-1 implements the following standard Modbus functions: 3: Read Holding Registers ▪ 4: Read Input Registers ▪ 6: Write Single Register ▪ 16: Write Multiple Registers (Despite this function is allowed, the interface does not ▪... -
Page 19: Eia-485 Bus. Termination Resistors And Fail Safe Biasing Mechanism
This mechanism must be supplied by the Modbus Master. The MH-RC-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 20: Mechanical And Electrical Features
MH-RC-MBS-1 User’s Manual r6.3 EN 5. Mechanical and electrical 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 21: List Of Supported Ac Unit Types
MH-RC-MBS-1 User’s Manual r6.3 EN 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 21/23 © Intesis Software S.L.U. - All rights reserved http://www.intesisbox.com... -
Page 22: Error Codes
Communication error between the master unit and slave units Emergency stop 65532 Initialization process (around 2min) before normal operation starts. This (-4) error appears in case that MH-RC-MBS-1 is set as Master. 65535 Communication error of MH-RC-MBS-1 or Remote controller with the AC (-1) unit. - Page 23 MH-RC-MBS-1 User’s Manual r6.3 EN In case to detect an error code not listed, contact your closest Mitsubishi Heavy Industries technical support service. 23/23 © Intesis Software S.L.U. - All rights reserved http://www.intesisbox.com This information is subject to change without notice Email info@intesisbox.com...
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