Intesis IN485UNI001I000 Modbus RTU interface for infrared HVAC integration User Manual

Intesis IN485UNI001I000 Modbus RTU interface for infrared HVAC integration User Manual

Important 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. The information in this document shall therefore not be construed as a commitment on the part of HMS Industrial Networks and is subject to change without notice. HMS Industrial Networks makes no commitment to update or keep current the information in this document.

The data, examples and illustrations found in this document are included for illustrative purposes and are only intended to help improve understanding of the functionality and handling of the product. In view of the wide range of possible applications of the product, and because of the many variables and requirements associated with any particular implementation, HMS Industrial Networks cannot assume responsibility or liability for actual use based on the data, examples or illustrations included in this document nor for any damages incurred during installation of the product. Those responsible for the use of the product must acquire sufficient knowledge in order to ensure that the product is used correctly in their specific application and that the application meets all performance and safety requirements including any applicable laws, regulations, codes and standards. Further, HMS Industrial Networks will under no circumstances assume liability or responsibility for any problems that may arise as a result from the use of undocumented features or functional side effects found outside the documented scope of the product. The effects caused by any direct or indirect use of such aspects of the product are undefined and may include e.g. compatibility issues and stability issues.

ORDER CODE

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LEGACY ORDER CODE

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IN485UNI001I000

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Presentation

Intesis gateway IN485UNI001I000 provides full integration of infrared-enabled air conditioners into Modbus RTU (EIA-485) networks.
Compatible with most AC units equipped with an IR receiver

Main features

• Reduced dimensions and quick installation
• Compatible with most AC brands, infrared enabled models
• Wall or desktop (surface) mounted. Reduced dimensions for easy installation.
• Direct connection to Modbus RTU over EIA-485 as a slave device
• Up to 63 interfaces can be connected to the Modbus network
• Auto-learn function for quick and easy setup of IR remote control
• Mini USB port for connection to config software. It is also used for power supply
• Power adapter included (EU, UK, USA and AU plugs supplied).
• Simultaneous control of the AC unit both from Modbus and from IR remote controller.

Quick setup

1. Connect the interface via mini USB to the PC (cable not included, Mini-USB Type Mini B)
2. Configure your device using Intesis MAPS configuration software (Check Intesis MAPS User Manual for detailed description).
3. Install the interface in proximity of the AC indoor unit and connect it to the power supply. Check the interface location that best fits the installation (More at chapter 3. Device Installation ). Use parrot mode to verify the device location.
4. Connect RS485 to Modbus RTU network.

IMPORTANT: Power supply
The interface is USB-powered. If not connected to a computer for setting or testing routines from the Config Tool, the USB port should be feeding 5 Volts DC from the power adapter (included)

Device Installation

This Intesis device is equipped with four infrared (IR) emitters and one IR receiver. Two emitters point at the front, two are 45º oriented, downwards, one for each side. The receiver gets feedback from the IR wireless remote controller, so the AC unit status is reported to the Modbus system.

Built-in IR emitters and IR receiver

Device emplacement and IR connection

Intesis IN485UNI001I000 is intended for surface mount, either wall or desktop. Different emplacements are acceptable, as shown in figures below.

Wall mount.

Wall / desktop mount.

Case A: Placed side-by-side with the AC unit. The signal will travel from the Intesis device to the AC unit taking advantage of the rebounds on the floor or furniture present in the room.

Case B: Placed in front of the AC unit. The signal will travel from the Intesis device directly to the AC unit.

Case C: Below the AC unit. In this case, the signal will travel from the Intesis device to the AC unit taking advantage of the rebounds on the wall in front of it or other furniture.

Case D: Desktop mount. The signal will travel directly from the Intesis device to the AC unit.

Built/in ports and sensors.

Connection to EIA-485

Notice: the EIA-485 screw terminal block at the back of the device.

Mini USB port

Use the USB cable to connect the device to a computer running config software, for setting and testing purposes, or to the power adapter (included), for regular operation

Modbus Interface Specification

Modbus physical layer

IN485UNI001I000 implements a Modbus RTU Slave interface, to be connected to an EIA-485 bus. It performs an 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).

Modbus Registers

All registers are type “16-bit unsigned Holding Register” and they use the standard Modbus big endian notation. the Modbus big endian notation.

AC Control and status registers

IN485UNI001I000 has the following Modbus Maps to control and monitor the AC unit. Consider that this table shows the maximum range of values available in every Modbus register and that it will be adapted to the IR control to simulate in every application.

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

• 0: Auto
• 1: FS1
• 2: FS2
• …
• 9: FS9

3| 4| R/W| AC unit Vertical Vane Position 1

• 0: Auto
• 1: Pos1
• 2: Pos2
• …
• 7: Pos7
• 10: Swing

4| 5| R/W| AC unit Temperature Set point 2,3,3

• -32768 (Initialization value)
• 16..31 (ºC) (0 = undetermined)
• 61..86 (ºF) (0 = undetermined)

5| 6| R| AC unit Ambient Temperature ¡Error! Marcador no definido.,2,3

• 18..30 (ºC) (0 = undetermined)
• 64,4..86 (ºF) (0 = undetermined)

1. Available values will depend on the AC unit mode. Check the AC unit user manual to know the possible values for this register
2. Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit.
3. It is not possible turn to x10 the value shown in Fahrenheit

Register Address (protocol address)| Register Address (PLC address)| R/W| Description
---|---|---|---
| | |

• 0x8000 No set point sent from the Remote controller

7| 8| R/W| IN485UNI001I000 Disablement 4

• 0: IN485UNI001I000 enabled (Default value)
• 1: IN485UNI001I000 disabled

8| 9| R/W| AC Remote Control Disablement 5

• 0: Remote Control enabled (Default value)
• 1: Remote Control disabled

9| 10| R/W| AC unit Operation Time

• 0..65535 (hours). Counts the time the AC unit is in “On” state.

26| 27| R/W| AC unit Horizontal Vane Position ¡Error! Marcador no definido.

• 0: Auto
• 1: Pos1
• 2: Pos2
• …
• 7: Pos7
• 10: Swing

27| 28| R/W| AC unit Vertical Vane Pulse ¡Error! Marcador no definido.

• 1: Pulse

34| 35| R/W| AC unit Horizontal Vane Pulse ¡Error! Marcador no definido.

• 1: Pulse

70| 71| R| Relative humidity

• 0-100% relative humanity

21| 22| R| Max. number of fan speeds

Maximum number of fan speeds available.

24| 25| R| AC max set point ¡Error! Marcador no definido.,2,3

•  -32768 (Initialization value) Upper limit for set point setting

25| 26| R| AC min setpoint ¡Error! Marcador no definido.,2,3

• -32768 (Initialization value) Lower limit for setpoint setting

200| 201| R/W| Parrot Mode

• 0: Not active
• 1: Active

AC startup registers

Register Address (protocol address)| Register Address (PLC address)| R/W| Description
---|---|---|---
1100| 1101| R/W| Reset operation at startup:

• 0: Don’t send status to AC
• 1: Send status to AC

1101| 1102| R/W| AC unit On/Off at startup

• 0: Off
• 1: On

1102| 1103| R/W| AC unit Mode at startup 5

• This value is stored in non-volatile memory
  5 Available values will depend on the AC unit mode. Check the AC unit user manual to know the possible values for this register

Register Address (protocol address)| Register Address (PLC address)| R/W| Description
---|---|---|---
| | |

• 0: Auto
• 1: Heat
• 2: Dry
• 3: Fan
• 4: Cool

1103| 1104| R/W| AC unit Fan Speed at startup 1

• 0: Auto
• 1: FS1
• 2: FS2
• …
• 9: FS9

1104| 1105| R/W| AC unit Temperature Setpoint at startup 6,7,3

• -32768 (Initialization value)
• 16..31 (ºC) (0 = undetermined)

61..86 (ºF) (0 = undetermined)

1105| 1106| R/W| AC unit U/D Vane Position at startup ¡Error! Marcador no definido.

• 0: Auto
• 1: Pos1
• 2: Pos2
• …
• 7: Pos7
• 10: Swing

1106| 1107| R/W| AC unit L/R Vane Position at startup ¡Error! Marcador no definido.

• 0: Auto
• 1: Pos1
• 2: Pos2
• …
• 7: Pos7
• 10: Swing

Device Registers

Register Address (protocol address)| Register Address (PLC address)| R/W| Description
---|---|---|---
14| 15| R| Modbus RTU baud-rate

• 2400 bps
• 4800 bps
• 9600 bps (Default)
• 19200 bps
• 38400 bps
• 57600 bps
• 76800 bps
• 115200 bps

15| 16| R| Modbus Slave Address

• 1..63

49| 50| R| Device definition (device ID)
50| 51| R| Software version
97| 98| R/W| Block Periodic Sending’s 8

• 0: Non-blocked (Default value)

| | |

• 1: Blocked

99| 100| R/W| Reset device

• 1: Reset

203| 204| R| IR Remote version
204| 205| R| IR Remote code
202| 203| R/W| RGB led criteria:

• 0: OFF
• 1: ON
• 2: Report only
• changes

206| 207| R/W| RGB Led intensity. Values 1…5
10| 11| R| AC unit Alarm Status

• 0: No alarm condition
• 1: Alarm condition

11| 12| R| Error Code (IN485UNI001I000 errors)

• 0: No error present
• Any other: device error:

Error value          Error MBS              Description

0            65536    No error

-4           65532    Initialization value

-15        65521    Internal error

-16        65520    RCF Wrong CRC error

Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit. It is not possible turn to x10 the value shown in Fahrenheit. If the register is configured as “0:Non-blocked”, all commands received from Modbus will be sent to the AC system. If “1: Blocked”, commands from Modbus will only be sent to the AC system if they differ from the previous value.

Implemented Modbus functions

IN485UNI001I000 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)

EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism

EIA-485 bus requires a 120 Ω terminator resistor at each end of the bus to avoid signal reflections.

In order to prevent fail status detections by bus receivers 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. The Fail-Safe-Biasing mechanism is enabled by DIP-switch settings

Please check section 5.1 DIP-switch settings for details

The IN485UNI001I000 device includes an on-board terminator resistor of 120 Ω that can be connected to the EIA-485 bus by using built-in DIP-switch block. Some Modbus RTU EIA-485 Master devices can provide also internal 120 Ω terminator resistor and/or fail-safe biasing. Check the technical documentation of the Master devices connected to the EIA-485 network in each case.

Configuration settings

DIP-switch settings

To access the on boarded DIP-switch block, the enclosure must be opened by bending both frontal tabs (inserting a plane tool tip size <5 mm). This operation must be performed by qualified personnel only.

On boarded DIP-switch block

Push button functionality

The device is equipped with one push button which performs two different actions:

Action 1: AC ON &OFF

When Parrot mode is active, switching ON&OFF the AC is not permitted from this button. Please, exit Parrot mode to enable AC ON&OFF.

Action 2: Parrot mode enable / disable

When Parrot mode is enabled, the device will simply emit every IR signal picked at by the receiver, acting as a repeater. Parrot mode is used for testing or troubleshooting to confirm the device location for AC control.

Device LED indicator

The device is equipped with one multicolor LED indicator. Different colors are used to report different operation modes and operation conditions, as described in following tables

Normal operation

Parrot mode
Parrot mode is a function to find the best device location for its normal operation

Auto-learn mode

Auto learn is a function that allows to auto configure the native AC infrared remote controller in the IN485UNI001I000 device. This function can be enabled via Intesis Maps only, please, refer to Intesis Maps configuration manual for IN485UNI001I000 to use this function.

Device connected via USB

(low intensity)

| USB link performed
ORANGE| STEADY

(high intensity)

| Intesis Maps communication
MAGENTA| 0.5 s ON – 0.5 s OFF| USB communication (FW download in progress)
CYAN| 1s ON – 1s OFF (x3)| FW download finished

Error notification

Check Intesis Maps configuration manual to know how to overcome this error

Intesis® MAPS Config Tool

This interface in configured using Intesis Maps®. You can download this software for free in www.intesis.com. Please, review Intesis Maps IN485UNI001I000 user manual to learn how to configure the device using this software

Technical Specs

Enclosure| Plastic, type PC (UL 94 V-0)
Dimensions: 93 x 60 x 21 mm / 3.7” x 2.3” x 0.8”
Color: Light Grey. NCS S 1002-B| Operation Temp| 0°C to +60°C
---|---|---|---
Weight| 55 g| Storage Temp| -20°C to +85°C
Mounting| Surface mount (wall or desktop).| Operation humidity| 5% to 95%, non-condensing
Terminal Wiring
(low-voltage signals)| Per terminal: solid wires or stranded wires (twisted or with shielded termination)
1 core: 0.25mm2… 1 mm2
2 cores: 0.25mm2… 0.75 mm2
3 cores: 0.25mm2… 0.75 mm2| Storage Temp| < 95%, non-condensing
EIA – 485| 1 x EIA485 3-pin plug-in screw terminal block: A, B, SG| Protection| IP20 (IEC60529)
USB port| 1 x Mini-USB Type Mini B.
Power consumption: max. 400mA @ 5 Vdc| LED indicator| 1 x external LED – operational status
Buttons| 1 x Button|

Dimensions

List of compatible AC indoor units.

This interface is compatible with almost every AC indoor unit with IR (infrared) control. Check if your AC unit is already integrated in this link.

If your AC unit or IR remote controller were not in the list, contact Intesis TS Team to confirm if the IR remote is already integrated or how to initiate the integration process.

References

• Intesis | Gateway solutions for Building Automation
• Intesis | Gateway solutions for Building Automation
• Intesis | Gateway solutions for Building Automation

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