Intesis Modbus RTU Interface for Toshiba Air Conditioners User Manual

User Manual for Intesis models including: Intesis, EIA-485

User Manual INMBSTOS001R000

Intesis, Toshiba, VRF, Digital, Modbus, RTU, INMBSTOS001R000, hms, AC, interfaces

HMS Networks S.L.U.

Compatible with Digital Inverter & VRF lines

Check the AC unit model functions in its 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. See section 4.3.6 for more information. 3 It is not possible turn to x10 the value shown in Fahrenheit.

Compatible with Digital Inverter & VRF lines

2. Attach the interface 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 AB bus between the interface and the AC indoor unit following the instructions of the diagram.

User Manual INMBSTOS001R000 - Intesis

HMS Industrial Networks reserves the right to modify its products in line with its policy of continuous product development.

File Info : application/pdf, 28 Pages, 873.94KB

user-manual-inmbstos001r000

Compatible with Digital Inverter & VRF lines
USER MANUAL
Issue date: 04/2019 r2.7 ENGLISH

IntesisTM INMBSTOS001R000

User's Manual r2.7 EN

Modbus RTU (EIA-485) Interface for Toshiba air conditioners Compatible with Digital Inverter & VRF lines

ORDER CODE

LEGACY ORDER CODE

INMBSTOS001R000 TO-RC-MBS-1

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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. 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.

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IntesisTM INMBSTOS001R000
INDEX

User's Manual r2.7 EN

1. Presentation .......................................................................................................... 5 2. Connection ............................................................................................................ 6
2.1 Connect to the AC indoor unit ............................................................................... 6 2.2 Connection to the EIA-485 bus ............................................................................. 6 3. Quick Start Guide................................................................................................... 7 4. Modbus Interface Specification ................................................................................ 8 4.1 Modbus physical layer.......................................................................................... 8 4.2 Modbus Registers ................................................................................................ 8
4.2.1 Control and status registers ........................................................................... 8 4.2.2 Configuration Registers................................................................................ 10 4.3 Modbus Registers for Advanced Functions ............................................................ 10 4.3.1 Advanced registers for Indoor Unit status ...................................................... 10 4.3.2 Advanced registers for Outdoor Unit Status on VRF-SMMSi Systems.................. 11 4.3.3 Advanced registers for Outdoor Unit Status on VRF-SHRM/SMMS Systems ...... 13 4.3.4 Advanced registers for Outdoor Unit Status on RAV Systems ............................ 14 4.3.5 Advanced registers for Indoor Unit Type and Refresh Time adjustment .............. 15 4.3.6 Considerations on Temperature Registers ...................................................... 16 4.4 DIP-switch Configuration Interface ...................................................................... 18 4.5 Implemented Functions ..................................................................................... 21 4.6 Device LED indicator ......................................................................................... 21 4.7 EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism ...................... 22 5. Electrical and Mechanical features .......................................................................... 23 6. List of supported AC Unit Types. ............................................................................ 24 7. Error Codes ......................................................................................................... 25

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1. Presentation

The INMBSTOS001R000 interfaces allow a complete and natural integration of Toshiba air conditioners into Modbus RTU (EIA-485) networks.
Compatible with Digital Inverter & VRF lines.
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.
· Direct connection to Modbus RTU (EIA-485) networks. Up to 63 INMBSTOS001R000 devices can be connected in the same network.
INMBSTOS001R000 is a Modbus slave device.
· Direct connection to the AC indoor unit. Up to 16 AC indoor units can be connected to INMBSTOS001R000, 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 unit's internal variables.
· Allows simultaneous use of the AC's remote controls and Modbus RTU.

INMBSTOS001R000

Modbus RTU EIA-485 network

Modbus RTU Master device

Up to 63 AC indoor units*

INMBSTOS001R000

· SCADA · PLC · DDC · BMS · HMI · Controller
· etc

INMBSTOS001R000
* Up to 63 Intesis devices can be installed in the same Modbus RTU bus. However, depending on the configured speed, the installation
of Modbus Repeaters may be required

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2. 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.

2.1 Connect to the AC indoor unit
The INMBSTOS001R000 connects directly to the Toshiba AB Bus, which is not provided within the interface. The recommended connection' methods are the following ones (details in Figure 2. 1):

· Wired remote control available.

· No remote control available

Maximum AB bus length is 500 m / 1,640.42 ft. The bus has no polarity sensitivity.

Important: If a wired remote controller of the AC manufacturer is connected in the same bus, communication may shut down.

(It is not mandatory to have it in the network)
Remote Controller
Toshiba

53 mm / 2.1"

AC Indoor Unit AC Indoor Unit

Internal electronic control board
B A
Internal electronic control board
B A

B A
Max 500 m / 1,640.42 ft Max 500 m / 1,640.42 ft

A B AC Unit
EIA485 A+ B-

90 mm / 3.5"

53 mm / 2.1"
A B AC Unit
EIA485 A+ B-

MODBUS RTU EIA-485 Bus
For wall mounting extract the upper and down staples until you hear the "click".
90 mm / 3.5"

MODBUS RTU EIA-485 Bus

Figure 2. 1 INMBSTOS001R000 connection diagram
2.2 Connection to the EIA-485 bus
Connect the EIA-485 bus wires to the plug-in terminal block of INMBSTOS001R000 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 120 must be present at each end of the bus to avoid signal reflections. The bus needs a fail-safe biasing mechanism (see section 4.7 for more details).

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IntesisTM INMBSTOS001R000
3. Quick Start Guide

User's Manual r2.7 EN

1. Disconnect the air conditioning from the Mains Power.

2. Attach the interface 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 AB bus between the interface and the AC indoor unit following the instructions of the diagram. Screw each bare cable end in the corresponding AB terminals of each device.

4. Connect the EIA-485 bus to the connector EIA485 of the interface.

5. Close the AC indoor unit.

6. Check the DIP-Switch configuration of the Intesis interface and make sure it matches the current installation's parameters (see section 4.4).

By default, the interface is set to: Modbus Slave Address 1

SW3
ON

SW4
ON

Modbus baud rate 9600 bps

These parameters can be modified from SW4 and SW3 DIP-Switches. All other switch positions are set at low level (Off position ) by default.

NOTE: All changes on the DIP-Switch configuration require a system power cycle to be applied.

7. Connect the AC system to Mains Power.
IMPORTANT: The Intesis interface requires to be connected to the AC unit (powered) to start communicating.

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4. Modbus Interface Specification
4.1 Modbus physical layer
INMBSTOS001R000 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).
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

R/W R/W R/W R/W
R/W
R/W

Description
AC unit On/Off
0: Off 1: On
AC unit Mode 1
0: Auto 1: Heat 2: Dry 3: Fan 4: Cool
AC unit Fan Speed 1
0: Auto 1: Low 2: Mid 3: High
AC unit Vane Position 1
1: POS1 (Horizontal) 2: POS2 (Horizontal) 3: POS3 (Medium) 4: POS4 (Vertical) 5: POS5 (Vertical) 6: POS6 7: POS7 10: Swing
AC unit Temperature Setpoint 1,2,3
-32768 (Initialization value) 16..32ºC (ºC/x10ºC) 61..90ºF

1 Available values will depend on the AC unit mode. Check the AC unit model functions in its user manual to know the possible v alues for this register. 2 Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit. See section 4.3.6 for more
information. 3 It is not possible turn to x10 the value shown in Fahrenheit.

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R/W R/W R/W R/W R/W R/W
R R
R/W
R
R/W

Description
AC unit Temperature reference 1,2,3
-32768: Initial value. Value invalid, which comes from the IU's sensor. If the value that is shown in register 22 (23 PLC) is valid, the address is going to take this value.
Ranges are specific from Manufacturer (ºC/x10ºC/ºF)
Window Contact
0: Closed (Default) 1: Open
INMBSTOS001R000 Disablement 4
0: INMBSTOS001R000 enabled (Default) 1: INMBSTOS001R000 disabled
AC Remote Control Disablement 4
0: Remote Control enabled (Default) 1: Remote Control disabled
AC unit Operation Time 4
0..65535 (hours). Counts the time the AC unit is in "On" state.
AC unit Alarm Status
0: No alarm condition 1: Alarm condition
Error Code 5
0: No Error active 65535 (-1): Error in the communication of
INMBSTOS001R000 with the AC indoor unit. Any other error present, see the table at the
end of this document.
Indoor unit´s ambient temperature from external sensor (at Modbus side) 1,2,3,6
-32768: Initialization value. No temperature is being provided from an input sensor. There's no input sensor.
Any other: (ºC/x10ºC/ºF)
AC Real temperature setpoint 1,2,3,6
There's no Virtual Temperature. The value equals to the value of register 5 (6 PLC). The value which is introduced by the user is the one that the machine uses (the external sensor is able to write directly over the machine to do this operation).
Ranges are specific from Manufacturer
(ºC/x10ºC/ºF)
Block Periodic Sendings 4,7,8
0: Non-blocked (Default value) 1: Blocked

4 This value is stored in non-volatile memory 5 See section 7 for possible error codes and their explanation 6 See section 4.3.6 for more information 7 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. 8 This register applies to firmware version 2.3 onwards

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IntesisTM INMBSTOS001R000 4.2.2 Configuration Registers

User's Manual r2.7 EN

R/W Description

R/W
R
R R R R

"Open Window" switch-off timeout 9
0..30 (minutes) Factory setting: 30 (minutes)
Modbus RTU baud-rate 10
2400bps 4800bps 9600bps (Default) 19200bps 38400bps 57600bps 76800bps 115200bps
Modbus Slave Address
1..63
Max number of fan speeds
Device ID: 0x1F00
Software version

While the initialization is ongoing, some Modbus registers indicate an undetermined value. Once the normal operation starts, they acquire its corresponding value. It is important to keep in mind that any change done during the initialization process will not have effect until it has been finished.

4.3 Modbus Registers for Advanced Functions

4.3.1 Advanced registers for Indoor Unit status

These registers are only available when the indoor unit's type selected on SW1 is different from the default value. Please, check the Section 4.4 for more information.

NOTE: IU stands for Indoor Unit's index

R/W R R R R

Description
Indoor Unit exist
0: Doesn't exist 1: Exist
Indoor Unit address
MSB OU address ; LSB IU address
Indoor Unit duty
0..15
Indoor Unit defrost
0: Off 1: On

Priority 0 0 1 1

9 Once window contact is open, a count-down to switch off the AC Unit will start from this configured value. 10 The range 38400bps-115200bps applies to firmware version 2.3 onwards

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Register Address (Protocol address) (IU 1) * 25 + 4004 (IU 1) * 25 + 4005 (IU 1) * 25 + 4010 (IU 1) * 25 + 4011 (IU 1) * 25 + 4012 (IU 1) * 25 + 4013 (IU 1) * 25 + 4014 (IU 1) * 25 + 4015
(IU 1) * 25 + 4016
(IU 1) * 25 + 4017 (IU 1) * 25 + 4018 (IU 1) * 25 + 4019 (IU 1) * 25 + 4020 (IU 1) * 25 + 4021

Register Address (PLC address)
(IU 1) * 25 + 4005 (IU 1) * 25 + 4006 (IU 1) * 25 + 4011 (IU 1) * 25 + 4012 (IU 1) * 25 + 4013 (IU 1) * 25 + 4014 (IU 1) * 25 + 4015 (IU 1) * 25 + 4016
(IU 1) * 25 + 4017
(IU 1) * 25 + 4018 (IU 1) * 25 + 4019 (IU 1) * 25 + 4020 (IU 1) * 25 + 4021 (IU 1) * 25 + 4022

R/W R R R R R R R R
R
R R R R R

Description
Indoor Unit filter alarm
0: No alarm 1: Alarm
Indoor Unit 11hermos ON.
0: Cool 1: Heat
Room temperature (During Control)
x1 ºC
Room temperature (Remote Controller)
x1 ºC
Indoor suction temperature (TA)
x1 ºC
Indoor fan coil temperature (TCJ)
x1 ºC
Indoor fan coil temperature (TC2)
x1 ºC
Indoor fan coil temperature (TC1)
x1 ºC
Indoor discharge temperature (TF)
x1 ºC Only for VRF systems
Revolutions indoor fan
RPS Only for RAV systems
Indoor PMV opening
x1, x10 Pulses Only for VRF systems
Running hours indoor fan
x100 hours Only for RAV systems
Time filtersign
Hours Only for RAV systems
Estimated supply air temperature
x1 ºC Only for RAV systems

Priority 1 1 2 2 1 1 1 1
0
0 1 0 0 0

4.3.2 Advanced registers for Outdoor Unit Status on VRF-SMMSi Systems

These registers are only available when the indoor unit's type selected on SW1 is different from the default value. Please, check section 4.4 for more information.

R/W Description

Outdoor Unit duty
15

Priority 1

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Register Address (protocol address)
4210
4211
4212
4213
4214 4215 4216
4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230
4231
4232

Register Address (PLC address) 4211
4212
4213
4214
4215 4216 4217
4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231
4232
4233

R/W Description

Priority

High-pressure sensor detention

R pressure (Pd)

X100 Mpa

Low-pressure sensor detention

R pressure (Ps)

X100 Mpa

Compressor

discharge

R temperature (Td1)

x1 ºC

Compressor

discharge

R temperature (Td2)

x1 ºC

Compressor

discharge

R temperature (Td3)

x1 ºC

Suction temperature (TS)
x1 ºC

Outdoor fan coil temperature 1

R (TE1)

x1 ºC

Outdoor fan coil temperature 2

R (TE2)

x1 ºC

Temperature at liquid side (TL)
x1 ºC

Outside ambient temperature

R (TO)

x1 ºC

PMV1 + 2 opening
x1 Pulse

PMV4 opening
x1 Pulse

Compressor 1 current (I1)
x10 A

Compressor 2 current (I2)
x10 A

Compressor 3 current (I3)
x10 A

Outdoor fan current (Ifan)
x10 A

Compressor 1 revolutions
x10 RPS

Compressor 2 revolutions
x10 RPS

Compressor 3 revolutions
x10 RPS

Outdoor fan mode
x1 mode

Compressor IPDU 1 heat sink

R temperature

x1 ºC

Compressor IPDU 2 heat sink

R temperature

x1 ºC

Compressor IPDU 3 heat sink

R temperature

x1 ºC

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R/W Description

Priority

Outdoor fan IPDU heat sink

R temperature

x1 ºC

Heating/cooling

recovery

R controlled 5

0: Normal

1: Recovery controlled

Pressure release 5

0: Normal

1: Recovery controlled

Discharge temperature release 5

0: Normal

1: Recovery controlled

Follower unit release (U2/U2/U4

R outdoor units) 5

0: Normal

1: Recovery controlled

Outdoor unit horsepower
x1 HP

4.3.3 Advanced registers for Outdoor Unit Status on VRF-SHRM/SMMS Systems

These registers are only available when the indoor unit's type selected on SW1 is different from the default value. Please, check section 4.4 for more information

R/W Description

Outdoor Unit duty
15

Td1-Compressor 1 Discharge R Temp.

x1 ºC

Td2-Compressor 2 Discharge R Temp.
x1 ºC

Pd High Pressure Sensor
Mpa

R Ps Low Pressure Sensor
Mpa

TS Suction Temp.
x1 ºC

TE Outdoor Heat Exchanger R Temp.

x1 ºC

R TL Liquid Temp.
x1 ºC

TO Outside ambient R temperature

x1 ºC

TU Low Pressure Saturated R Temp.

x1 ºC

Priority 1 2
2 2 2 2 2 2 1
2

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R/W Description

Compressor 1 Current
A

R Compressor 2 Current
A

PMV1 + 2 Opening
0..100

Compressor 1, 2

0: Off

1: On

R Outdoor Fan Mode
0..31

Outdoor Unit Size
HP

Priority 1 2 2 2 2 2

4.3.4 Advanced registers for Outdoor Unit Status on RAV Systems

These registers are only available when the indoor unit's type selected on SW1 is different from the default value. Please, check section 4.4 for more information

R/W Description

Outdoor Unit duty
0..15

TE temperature (evaporator)
x1 ºC

TO temperature outdoor
x1 ºC

Compressor R temperature
x1 ºC

discharge

Suction temperature TS
x1 ºC

Temperature thyristor THS
x1 ºC

Compressor current
A

Temperature at liquid side TL
x1 ºC

Compressor revolutions
RPS

Revolutions lowest Fan
RPS

Revolutions upper Fan RPS

Running hours compressor
x100 hours

Priority 1 2 1
2
2 0 1 2 2 0 0 2

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4.3.5 Advanced registers for Indoor Unit Type and Refresh Time adjustment

R/W Description

R R/W

Indoor Unit Type
0: Not defined (extra signals disabled)
1: RAV 2: VRF (SMMSi) 3: VRF (SHRM/SMMS)
Refresh Time Adjust
1..4

Priority 0 -

Refresh Time Adjust This parameter indicates the cadence when reading priority signals. Priorities are defined as follows and can't be modified:
0: Update on start-up 1: High priority 2: Low priority
The higher the value, the fastest the priority signals are going to update. The cadence is defined by:
1: One high priority signal and one low priority signal's poll. 2: Two high priority signals and one low priority signal's poll. 3: Three high priority signals and one low priority signal's poll. 4: Four high priority signals and one low priority signal's poll.

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4.3.6 Considerations on Temperature Registers
· 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). A remote controller connected to the Toshiba indoor unit will report the same temperature setpoint value as this register.
· AC unit temperature reference (R) (register 5 in Protocol address / register 6 in PLC address): This register reports the temperature that is currently used by the Toshiba indoor unit as the reference of its own control loop.
If the value on the register 22 is valid (different from 0x8000), it will report the value from this register. If not, it will show the indoor unit reference temperature.
It is a read-only register (Modbus functions 3 or 4).
Depending on the mode selected, the register shows a different value:
Heat Mode: Temperature reference = Ambient temperature +0.5ºC
Dry Mode / Fan Mode / Cool mode: Temperature reference = Ambient temperature -0.5ºC
When the mode changes from Heat to anyone else, or from anyone else to Heat, the register updates the value using the intervals +0.5ºC/-0.5ºC
· AC unit external temperature reference (Modbus) (R/W) (register 22 in Protocol address / register 23 in PLC address): This register reports the temperature from an external sensor in the Modbus side. If valid value is received, the Modbus register will indicate a 0x8000 value.
This register can be read (Modbus function 3 or 4) or written (Modbus functions 6 or 16).
· AC Real temperature setpoint (R) (register 23 In Protocol address / register 24 in PLC address): This register will show the same value as in register 4 (protocol address). The reference temperature from the remote controller is sent directly to the AC unit to be applied in the control loop.
It is a read-only register (Modbus functions 3 or 4).
Moreover, notice that temperature's values of all these four registers are expressed according to the temperature´s format configured through its onboard DIP-Switches (See "4.4 -

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DIP-switch Configuration Interface"). These following formats are possible:

· Celsius value: Value in Modbus register is the temperature value in Celsius (i.e. a value "22" in the Modbus register must be interpreted as 22ºC)
· Decicelsius value: Value in Modbus register is the temperature value in decicelsius (i.e. a value "220" in the Modbus register must be interpreted as 22.0ºC)
· Fahrenheit value: Value in Modbus register is the temperature value in Fahrenheit (i.e. a value "72" in the Modbus register must be interpreted as 72ºF (~22ºC).

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4.4 DIP-switch Configuration Interface
All the configuration values on INMBSTOS001R000 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:

A B AC Unit

SW1
ON
1 2 3 4
SW1

EIA485 A+ B-

SW3 SW4

1 2 3 4 5 6 7 8
SW3

1 2 3 4
SW4

The following tables apply to the interface´s configuration through DIP-switches: SW1 AC indoor unit's features

SW1-P1..2 Description

ON
Indoor Unit type not defined (Default value)

ON
Machine type: VRF-SMMSi
ON
Machine type: RAV
ON
Machine type: VRF-SMMS/SHRM
ON
Not used (Default value)

ON
Not used

Esclavo del bus A B (Valor por defecto)- Debe existir un mando Toshiba configurado como Header

en el bus AB

Slave of bus A B (Default value) A Toshiba Controller must be present in the AB bus, configured

as Header.

Maestro del bus A B - No es necesario un mando Toshiba en bus AB. Si lo hay, debe ser configurado

como Follower.

Master of bus A B Toshiba Remote Controller is not necessary to have it in the bus AB. If it exists, it

must be configured as Follower.

Table 4.1 SW1: AC indoor unit´s features

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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.

SW4-P1..2-4 Description
ON
Temperature values in Modbus register are represented in degrees (x1) (Default value)
ON
Temperature values in Modbus register are represented in Decidegrees (x10)
ON
Temperature values in Modbus register are represented in Celsius degrees (Default value)
ON
Temperature values in Modbus register are represented in Fahrenheit degrees
ON
EIA-485 bus without termination resistor (Default value)
ON
Internal termination resistor of 120 connected to EIA-485 bus
Table 4.3 SW4: Temperature and termination resistor configuration

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SW3 Modbus Slave address

Add SW3-P1..6 Add SW3-P1..6 Add SW3-P1..6 Add SW3-P1..6 Add SW3-P1..6

ON
0
ON
1
ON
2
ON
3
ON
4
ON
5
ON
6
ON
7
ON
8
ON
9
ON
10
ON
11
ON
12

ON
13
ON
14
ON
15
ON
16
ON
17
ON
18
ON
19
ON
20
ON
21
ON
22
ON
23
ON
24
ON
25

ON
26
ON
27
ON
28
ON
29
ON
30
ON
31
ON
32
ON
33
ON
34
ON
35
ON
36
ON
37
ON
38

ON
39
ON
40
ON
41
ON
42
ON
43
ON
44
ON
45
ON
46
ON
47
ON
48
ON
49
ON
50
ON
51

ON
52
ON
53
ON
54
ON
55
ON
56
ON
57
ON
58
ON
59
ON
60
ON
61
ON
62
ON
63

Table 4.4 SW3: Modbus slave address

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IntesisTM INMBSTOS001R000

User's Manual r2.7 EN

4.5 Implemented Functions
INMBSTOS001R000 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)

4.6 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

During not normal operation

LED blinking

During normal operation

LED flashing

ON / OFF Period 500ms ON / 500ms OFF 100ms ON / 1900ms OFF

Description
Communication error
Normal operation (configured and working properly)

L2 (red LED)

Device status

LED indication

During not normal operation

LED Pulse

ON / OFF Period 3sec ON / --- OFF

Description Under voltage

L1 (green LED) & L2 (red LED)

Device status

LED indication

During normal operation

LED Pulse

During not normal LED alternatively

operation

blinking

ON / OFF Period 5sec ON / --- OFF 500ms ON / 500ms OFF

Description Device Start-up EEPROM failure

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IntesisTM INMBSTOS001R000

User's Manual r2.7 EN

4.7 EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism
EIA-485 bus requires a 120 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. 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 INMBSTOS001R000 device includes an on-board terminator resistor of 120 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 120 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).

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IntesisTM INMBSTOS001R000

User's Manual r2.7 EN

5. Electrical and Mechanical features

Enclosure Weight

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
85 g.

Operation Temperature
Stock Temperature

0ºC to +60ºC -20ºC to +85ºC

Mounting

Wall DIN rail EN60715 TH35.

Operational Humidity

<95% RH, non-condensing

Terminal Wiring (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

Modbus RTU port
AC unit port

1 x Serial EIA485 Plug-in screw terminal block (2 poles):
A, B Compatible with Modbus RTU EIA-485 networks
1 x AB bus Plug-in screw terminal block (2 poles):
A, B Compatible with Toshiba networks

Switch 1 (SW1)

1 x DIP-Switch for AC features

Stock Humidity <95% RH, non-condensing

Isolation voltage 1500 VDC

Isolation resistance
Protection

1000 M IP20 (IEC60529)

Switch 3 (SW3)

1 x DIP-Switch for Modbus RTU settings

LED indicators

2 x Onboard LED - Operational status

Switch 4 (SW4)

1 x DIP-Switch for extra functions

AC Unit connection

LED Indicators

DIP Switch SW1

DIP

Switch SW3 Switch SW4

EIA-485 Port

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IntesisTM INMBSTOS001R000

User's Manual r2.7 EN

6. List of supported AC Unit Types.
A list of Toshiba indoor unit model references compatible with INMBSTOS001R000 and their available features can be found in:
https://www.intesis.com/docs/compatibilities/inxxxtos001rx00_compatibility

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IntesisTM INMBSTOS001R000

User's Manual r2.7 EN

7. Error Codes

Error Code Decimal
0 33 34 35 36
37
38
44 48 49 50 51 52 53 54 55 56 57 58 60 61 63
65
66 67
68
69
70
71
72
73
74
75
76 77

Error Code Hex
0 21 22 23 24
25
26
2C 30 31 32 33 34 35 36 37 38 39 3A 3C 3D 3F
41
42 43
44
45
46
47
48
49
4A
4B
4C 4D

Error in Remote Controller
N/A C01 C02 C03 C04
C05
C06
C12 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C28 C29 C31
E01
E02 E03
E04
E05
E06
E07
E08
E09
E10
E11
E12 E13

Error category Error Description

INMBSTOS001R000
Central Controller Issues
Addressing and Communication
Problems

No active error Duplicated setting of control address Central control number of units mis-matched Incorrect wiring of central control Incorrect connection of central control System Controller fault, error in transmitting comms signal, i/door or o/door unit not working, wiring fault System Controller fault, error in receiving comms signal, i/door or o/door unit not working, wiring fault, CN1 not connected correctly Batch alarm by local controller Transmission error from adaptor to unit Reception error to adaptor from unit Duplicate central address in adaptor Duplicate adaptor address Mix of PAC & GHP type units on adaptor Memory fault in adaptor Incorrect address setting in adaptor Host terminal software failure Host terminal hardware failure Host terminal processing failure Host terminal communication failure Reception error of S-DDC from host terminal Initialization failure of S-DDC Configuration change detected by adaptor Remote control detecting error from indoor unit, Address not set/Auto address failed. Check interconnecting wiring etc. Re-address system. Remote detecting error from indoor unit, Indoor unit detecting error from remote, Indoor seeing error from outdoor. Qty of i/d units connected are less than qty set. Check; all i/d units are ON, reset turn off all units wait 5min power up Indoor unit detecting error from outdoor unit, Error in sending comms signal Outdoor unit detecting error from indoor unit, Error in receiving comms signal Outdoor unit detecting error from indoor unit, Error in sending comms signal Incorrect setting indoor/controller, Indoor address duplicated Incorrect setting indoor/controller, Remote address duplicated or IR wireless controller not disabled
Indoor unit detecting error from `option' plug, Error in sending comms signal
Indoor unit detecting error from `option' plug, Error in receiving comms signal Auto addressing failed, Auto address connector CN100 shorted during auto addressing Indoor unit failed to send signal to remote

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IntesisTM INMBSTOS001R000

User's Manual r2.7 EN

100

101

102

103

104

106

107

108

109

111

112

113

114

116

119

120

125

126

127

129

130

131

E14
E15
E16
E17
E18 E19 E20
E23
E24
E25
E26
E28 E29
E31
F01 F02
F03
F04
F05
F06
F07 F08 F10 F11 F12 F13 F15 F16 F17 F18 F20 F23 F24 F29 F30 F31 H01 H02 H03

Addressing and Communication
Problems
Sensor Faults
Compressor Issues

controller Setting Failure, Duplication of master indoor units Auto addressing failed, Number of indoor units connected are less than number set Auto addressing failed, Number of indoor units connected are more than number set Group control wiring error, Main indoor unit not sending signal for sub indoor units Group control wiring error, Main indoor unit not receiving signal for sub indoor units Outdoor header units quantity error Auto addressing failed, No indoor units connected Sending error in communication between outdoor units Auto addressing failed, Error on sub outdoor unit Auto addressing failed, Error on outdoor unit address setting Auto addressing failed, Quantity of main and sub outdoor units do not correspond to the number set on main outdoor unit P.C.B. Follower outdoor unit error Auto addressing failed, Sub outdoor unit not receiving comms for main outdoor unit Between units, Comms failure with MDC, does E31 remain after power is re-instated? If so replace PCB. & power PCB Indoor Heat Exch inlet temp sensor failure (E1) Indoor Heat Exch freeze temp sensor failure (E2) Indoor Heat Exch outlet temp sensor failure (E3) Outdoor Discharge temp sensor failure (TD) or (DISCH1) Outdoor Discharge temp sensor failure (DISCH2) Outdoor Heat Exch temp sensor failure (C1) or (EXG1) Outdoor Heat Exch temp sensor failure (C2) or (EXL1) Outdoor Air temp sensor failure (TO) Indoor inlet temp sensor failure Indoor outlet temp sensor failure Outdoor Intake sensor failure (TS) GHP Cooling water temperature sensor failure Outdoor temp. sensor misconnection (TE1,TL) Outdoor High pressure sensor failure GHP - Cooling water temperature sensor fault GHP - Exhaust gas temperature sensor fault GHP Clutch coil temperature fault Outdoor Heat Exch temp sensor failure (EXG2) Outdoor Heat Exch temp sensor failure (EXL2) Indoor EEPROM error Clock Function (RTC) fault Outdoor EEPROM error Compressor Fault, Over current (Comp1) Compressor Fault, Locked rota current detected (Comp1) Compressor Fault, No current detected (Comp1)

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IntesisTM INMBSTOS001R000

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132

133

134

135

136

139

140

141

142

143

144

149

150

151

153

155

156

159

193

194

195

196

197

198

199

200

201

202

203

205

207

208

209

210

211

212

213

220

221

222

223

225

226

H04 H05 H06 H07 H08 H11 H12 H13 H14 H15
H16
H21 H22 H23 H25 H27 H28
H31 L01 L02
L03 L04
L05
L06
L07 L08 L09 L10 L11 L13 L15 L16 L17 L18 L19 L20 L21 L28 L29 L30 L31 P01 P02

Compressor Issues
Incorrect Settings
Indoor Unit Problems

Comp-1 case thermo operation Compressor Fault, Discharge temp not detected (Comp1) Compressor Fault, Low Pressure trip Compressor Fault, Low oil level Compressor Fault, Oil sensor Fault (Comp1) Compressor Fault, Over current (Comp2) Compressor Fault, Locked rota current detected (Comp2) Compressor Fault, No current detected (Comp2) Comp-2 case thermo operation Compressor Fault, Discharge temp not detected (Comp2) Oil level detection circuit error / Magnet switch error / Overcurrent relay error Compressor Fault, Over current (Comp3) Compressor Fault, Locked rota current detected (c.3) Compressor Fault, No current detected (Comp3) Compressor Fault, Discharge temp not detected (Comp3) Compressor Fault, Oil sensor fault (Comp2) Compressor Fault. Oil sensor (connection failure) Compressor Fault. IPM trip (IMP current on temperature) Setting Error, Indoor unit group setting error Setting Error, Indoor/outdoor unit type/model miss-matched Duplication of main indoor unit address in group control Duplication of outdoor unit system address 2 or more controllers have been set as 'priority' in one system - shown on controllers set as 'priority' 2 or more controllers have been set as 'priority' in one system - shown on controllers not set as 'priority' Group wiring connected on and individual indoor unit Indoor unit address/group not set Indoor unit capacity code not set Outdoor unit capacity code not set Group control wiring incorrect Indoor unit type setting error, capacity Indoor unit paring fault Water heat exch. unit setting failure Miss-match of outdoor unit with different refrigerant 4-way valve failure Water heat exch. unit duplicated address Duplicated central control addresses Gas type setup failure Maximum number of outdoor units exceeded No. of IPDU error Auxiliary interlock in indoor unit IC error Indoor unit fault, Fan motor thermal overload Outdoor unit fault, Compressor motor thermal overload, over or under voltage

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IntesisTM INMBSTOS001R000

User's Manual r2.7 EN

227

228

229

231

233

234

235

236

237

238

239

240

241

242

243

244

246

250

252

253

255

65535 (-1)

Outdoor unit fault, Compressor discharge

P03

temperature too high (Comp1) over 111 ºC.

Low on ref gas, exp. valve, pipework damage.

P04

Outdoor unit fault, High pressure trip

Outdoor unit fault, Open phase on power

P05

supply. Check power on each phase, inverter

PCB, control PCB

P07

Heat sink overheat error

P09

Indoor unit fault, Ceiling panel incorrectly wired

P10

Indoor unit fault, Condensate float switch opened

P11

GHP - Water Heat exch. low temp (frost protection) fault

P12

Indoor unit fault, Fan DC motor fault

P13

Outdoor liquid back detection error

P14

Input from leak detector (If fitted)

P15

Refrigerant loss, high discharge temp and EEV wide open and low compressor current draw.

P16

Outdoor unit fault, Open phase on compressor power supply

Outdoor unit fault, Compressor discharge

P17

temperature too high (Comp2) over 111ºC. Low

on ref gas, exp. valve, pipework damage.

P18

Outdoor unit fault, By-pass valve failure

Outdoor unit fault, 4 way valve failure, i/door

P19

temp rises in cooling or fills in heating. Check

wiring, coil, PCB output, valve operation.

Ref gas, high temp/pressure fault, heat exch.

P20

temp high C2, 55-60 ºC, cooling over-load,

sensor fault.

Outdoor unit fan motor fault, fan blade

P22

jammed, check connections, does fan turn freely, motor resistance 30-40ohm on each

pair, no fan fault, yes PCB fault.

Outdoor unit fault, Compressor overcurrent -

P26

check winding resistance, Inverter failure check internal resistance term HIC + & - to

UVW 200-300Kohm or more

Outdoor unit fault, Inverter circuit fault - Motor-

P29

current Detection Circuit (MDC) fault, check comp windings, sensors C1 & TS, if ok possible

PCB failure.

P30

Indoor unit fault, System controller detected fault on sub indoor unit

P31

Simultaneous operation multi control fault, Group controller fault

N/A

INMBSTOS001R000

Error in the communication of INMBSTOS001R000 with the AC unit

In case to detect an error code not listed, contact your closest Toshiba technical support service.

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References

Microsoft Word para Office 365