Compatible with commercial line for air conditioners commercialized by Hitachi USER MANUAL Issue date: 04/2019 r1.
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN Important User Information Disclaimer The information in this document is for informational purposes only. Please inform HMS Industrial Networks of any inaccuracies or omissions found in this document. HMS Industrial Networks disclaims any responsibility or liability for any errors that may appear in this document. HMS Industrial Networks reserves the right to modify its products in line with its policy of continuous product development.
IntesisTM INMBSHIT001R000 Modbus RTU conditioners (EIA-485) User’s Manual r1.5 EN Interface Compatible with commercial commercialized by Hitachi ORDER CODE INMBSHIT001R000 line for for air Hitachi air conditioners LEGACY ORDER CODE HI-RC-MBS-1 © HMS Industrial Networks S.L.U - All rights reserved This information is subject to change without notice URL https://www.intesis.
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN INDEX 1. Presentation .......................................................................................................... 5 2. Connection ............................................................................................................ 6 2.1 Connect to the AC indoor unit ............................................................................... 6 2.2 Connection to the EIA-485 bus ................................................
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN 1. Presentation The INMBSHIT001R000 interfaces allow a complete and natural integration of Hitachi air conditioners into Modbus RTU (EIA-485) networks. Compatible with commercial commercialized by Hitachi. line for air conditioner models Reduced dimensions. 93 x 53 x 58 mm 3.7” x 2.1” x 2.3” • Quick and easy installation. Mountable on DIN rail, wall, or even inside the indoor unit of AC. • External power not required.
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN 1. Connection The interface comes with a plug-in terminal block of 2 poles to establish direct connection with the AC indoor unit. It comes as well with a plug-in terminal block of 2 poles to establish direct connection with the Modbus RTU EIA-485 network. 1.1 Connect to the AC indoor unit The INMBSHIT001R000 connects directly to the Hitachi AB Bus, which is not provided within the interface.
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN 1.2 Connection to the EIA-485 bus Connect the EIA-485 bus wires to the plug-in terminal block of INMBSHIT001R000 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). Loop or star typologies are not allowed in the case of the EIA-485 bus. A terminator resistor of 120Ω must be present at each end of the bus to avoid signal reflections.
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN 3. Modbus Interface Specification 3.1 Modbus physical layer INMBSHIT001R000 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). It also supports 8N1 communication (8 data bits, no parity and 1 stop bit). 3.
IntesisTM INMBSHIT001R000 Register Address (protocol address) Register Address (PLC address) User’s Manual r1.
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN Register Address (protocol address) Register Address (PLC address) R/W 31 32 R 34 35 W 66 67 R 98 99 R/W Description Status (feedback) 0: Not active (Default value) 1: Active (A window is open) ▪ ▪ Left/Right Vane pulse 1: Pulse ▪ Return Path temperature 1,2,3 -32768 (Initialization value) Any: (ºC/x10ºC/ºF) ▪ ▪ Master/Slave (gateway) 0: Slave 1: Master ▪ ▪ 3.2.
IntesisTM INMBSHIT001R000 3.2.3 Considerations on Temperature Registers User’s Manual r1.5 EN o AC unit temperature setpoint (R/W) (register 4 – in Protocol address / register 5 – in PLC address): This is the adjustable temperature setpoint value that must be required by the user. This register can be read (Modbus function 3 or 4) or written (Modbus functions 6 or 16).
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN TAC - ambient temperature that the indoor unit is using as the reference of its own control loop (register 5/6) When INMBSHIT001R000 detects a change in any of the values of { Su , Tu , TAC }, it will send the new setpoint (SAC) to the indoor unit. o o After the startup, the value for “external temperature’s reference” (register 22/23) has a value -32768 (0x8000).
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN All the configuration values on INMBSHIT001R000 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: SW1 ON A B AC Unit 1234 SW1 EIA485 A+ BON SW3 ON 12345678 1234 SW3 SW4 SW4 The following tables apply to the interface´s configuration through DIP-switches: SW1 – AC indoor unit’s features SW1-P1..
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN SW3/SW4 – Baud rate configuration SW3-P7..8 ON SW4-P3 ON ON ON ON ON ON Description 2400bps 4800bps 9600bps (Default value) ON 19200bps ON ON ON ON ON ON ON 38400bps 57600bps 76800bps ON 115200bps Table 4.2 SW3-SW4: Modbus baud rate SW4 – Degrees/Decidegrees (x10), temperature magnitude (ºC/ºF) and EIA-485 termination resistor. SW4-P1..
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN SW3 – Modbus Slave address Add SW3-P1..6 Add ON 0 29 17 ON 5 ON 7 ON ON ON 11 ON ON 50 63 ON ON 38 ON 62 49 37 25 ON 61 ON ON ON ON ON ON 24 ON 60 48 36 ON ON ON ON ON ON 59 47 35 23 ON 58 ON ON 22 10 ON 46 34 ON ON 9 57 45 33 ON ON ON ON 21 ON 56 44 32 20 8 ON ON 19 ON 55 43 31 ON ON ON ON ON ON 54 42 30 18 6 ON ON ON ON 4 ON 53 41 ON 16 ON ON ON SW3-P1..
IntesisTM INMBSHIT001R000 3.4 Implemented Functions User’s Manual r1.5 EN INMBSHIT001R000 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 allow to write operations on more than 1 register with the same request, this means that length field should be always be 1 when this function is being used in case of writing) 3.
IntesisTM INMBSHIT001R000 3.6 EIA-485 bus. mechanism Termination User’s Manual r1.5 EN resistors and Fail-Safe Biasing EIA-485 bus requires a 120Ω terminator resistor at each end of the bus to avoid signal reflections. In order to prevent fail status detected by the receivers, 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.
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN 4. Mechanical and Electrical features Enclosure Plastic, type PC (UL 94 V-0) Net dimensions (dxwxh): 93 x 53 x 58 mm / 3.7” x 2.1” x 2.3” Color: Light Grey. RAL 7035 Operation Temperature 0ºC to +60ºC Weight 85 g. Stock Temperature -20ºC to +85ºC Mounting Wall DIN rail EN60715 TH35.
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN 5. List of supported AC Unit Types A list of Hitachi indoor unit model’s references compatible with INMBSHIT001R000 and its available features can be found on this link: https://www.intesis.com/docs/compatibilities/inxxxhit001r000_compatibility © HMS Industrial Networks S.L.U - All rights reserved This information is subject to change without notice URL https://www.intesis.
IntesisTM INMBSHIT001R000 User’s Manual r1.5 EN 6. Error Codes Error Code Modbus 0 Error in Remote Controller N/A 01 02 03 04 04 05 06 06 07 08 09 17 18 19 20 25 33 34 35 36 41 48 49 50 53 54 56 57 67 68 69 70 71 81 82 83 84 86 87 88 176 177 181 238 65535 (-1) 01 02 03 04 04. 05 06 06.
