Toshiba BMS-IFMB1280U-E Service Manual
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Toshiba BMS-IFMB1280U-E Service Manual

Toshiba BMS-IFMB1280U-E Service Manual

Modbus interface
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FILE No. A10-2103-7
Revision 7: May, 2024
Modbus interface
SERVICE MANUAL
Model name:
BMS-IFMB1280U-E
BMS-IFMB1280U-TR
PRINTED IN JAPAN, May, 2024 TBEX

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  • Page 1 FILE No. A10-2103-7 Revision 7: May, 2024 Modbus interface SERVICE MANUAL Model name: BMS-IFMB1280U-E BMS-IFMB1280U-TR PRINTED IN JAPAN, May, 2024 TBEX...

  • Page 2: Table Of Contents

    Contents Safety precautions ............3 1 Product overview.

  • Page 3: Safety Precautions

    Safety precautions Important safety-related information is described on the product and in this Service Guide. Read the following description on labels and symbols carefully and follow their directions. [Explanation of labels] Label Explanation Indicates that the repair engineer and other third-party individuals in the vicinity may be DANGER exposed to immediate risk of death or serious injury if operation is not performed correctly.
  • Page 4 WARNING Do not allow unauthorized personnel other than repair engineers to enter areas where fault diagnosis and repair work is conducted. Unauthorized persons may suffer injury from tools and disassembled parts. Restricted area Connect lead wires with crimping terminals and turn the closed end upwards to avoid exposure to water.

  • Page 5: Product Overview

    Product overview The Modbus interface is used to connect air conditioners “with TU2C-LINK Uh Line (hereinafter, referred to as Uh Line) installed” and TCB-IFCG1TLE to Modbus* system. This Modus Interface enables building management systems to calculate EER (Energy Efficiency Ratio) in real time.

  • Page 6: System Configuration

    System configuration An example of connection of the Modbus master device, the Modbus interface, and air conditioners is shown in the diagram below. Terminator Terminator Modbus-Master Modbus-I/F Slave 1 U3 U4 Uh Line Bus …… INDOOR / OUTDOOR TCB-IFCG1TLE RS-485 Bus Modbus-I/F Slave 4 U3 U4 Uh Line Bus...
  • Page 7 Indoor unit Central control address setting range Indoor unit compatible with Uh Line 1-128 Indoor unit not compatible with Uh Line 1-64 Number of Units Device Name Model Remarks Connected SMMS-7, 16 systems The model names for the outdoor units are Outdoor unit MiNi-SMMS7, (The line address is 1–28)
  • Page 8 When two or more Modbus interfaces are connected to a single line RS-485 bus, set the slave addresses of the Modbus interface as indicated in the table below. Modbus interface Slave address No.1 No.2 No.3 No.4 No.5 2-1. Communication and power cable specification 2-1-1.

  • Page 9: Modbus Functions

    Modbus functions For further details, refer to the Specifications Manual of Modbus Interface. 3-1. Applied function codes The following function codes are implemented. Broadcast message cannot be used. Function code Sub function code Function name 0x01 None Read coils 0x02 None Read Discrete input 0x03...

  • Page 10: Exception Response

    3-2. Exception response Slave units must return an exception response when they receive a request which has been sent correctly but contains an error that applies to any of the following exception codes. Exception code Name 0x01 Illegal function A request of illegal function that is not supported by this specification is received 0x02 Illegal data address An illegal address that does not exist in section 7 of this manual.
  • Page 11 3-4. List of functions for air conditioner For further details, refer to the Specifications Manual of Modbus Interface. <For indoor units> Function Monitoring Controlling ON / OFF   Setting temperature   Auto cool temperature setting   Auto heat temperature setting ...
  • Page 12 <For outdoor units> The EER function will be available with the Modbus interface for product lots manufactured in January 2022 or after. The model name of the outdoor unit that supports the EER function is mentioned in "9-9. Questions about functions".
  • Page 13 3-5. List of functions for TCB-IFCG1TLE For further details, refer to the Specifications Manual of Modbus Interface. Function Monitoring Controlling ON / OFF input for TCB-IFCG1TLE  ― Alarm input for TCB-IFCG1TLE  ― Din1 input for TCB-IFCG1TLE  ― Din2 input for TCB-IFCG1TLE ...
  • Page 14 Special functions Function Monitoring Controlling for ATW Indoor unit type  ― Operation mode / Fan range  ― Water temperature control mode / Room temperature control   ― mode status HOT WATER Device Connection status   ― Zone1 Device Connection status ...
  • Page 15 3-7. List of functions for Room Air Conditioner TU2C-LINK Interface (RAC) For further details, refer to the Specifications Manual of Modbus Interface. NOTE The RAC Interface model name is RAC TU2C-LINK Interface (TCB-SSRL011UUP-E). (1) RAC Interface is in the “Residential AC type” setting Special functions Function for Residential...
  • Page 16 (2) RAC Interface is in the “Light commercial AC type” setting Special functions Function for Residential Monitoring Controlling AC type ON / OFF   Setting temperature   Operation mode   Fan speed   Louver swing / stop swing / stop Save operation rate Pure Filter ON/OFF...
  • Page 17 3-8. List of functions for VRF Dx-coil controller For further details, refer to the Specifications Manual of Modbus Interface. NOTE • The VRF Dx-coil controller model name is TCB-IFDMX01UP-E, TCB-IFDMR01UP-E. • The functions listed may vary according to the product. •...
  • Page 18 (2) VRF Dx-coil controller is in the “DDC mode" setting Function Monitoring Controlling ON / OFF  Setting temperature Auto cool temperature setting Auto heat temperature setting Operation mode  Fan speed  HH,H,L,AUTO Louver Remote controller permit / Prohibit ...

  • Page 19: Product Specification

    Product specification  Modbus Interface Power supply 220 - 240 VAC, 50/60 Hz Power consumption Operating temperature / 0 to 40 °C, 10 to 90 % RH humidity 6-Ø5.5 Storage temperature -20 to +60 °C mounting holes Dimensions 66 (H) x 170 (W) x 200 (D) mm 63.6 Mass 1.1 kg...

  • Page 20: Connection Of Power Cables / Earth Wires / Communication Cables

    Connection of power cables / earth wires / communication cables CAUTION • The RS-485 communication cables have polarity. Connect A(+) to A(+), and B(-) to B(-). If connected with incorrect polarity, the unit will not work. • The Uh Line communication cable have no polarity. Connect power cables, earth wires, and communications cables to the specified terminals on the terminal block.
  • Page 21 Termination resistance setting • TU2C-LINK / TCC-LINK termination resistance setting ..<For TCC-LINK> Leave just 1 line of the termination resistance in the interface board of the outdoor unit (centre unit) ON, and turn all the others OFF. (Refer to the wiring diagram attached to the outdoor unit for the position of SW.) <For TU2C-LINK>...
  • Page 22  Design of Control Wiring Communication method and model name The TU2C-LINK model (U series) can be used together with previous models (other than U series). For details of the model and communication method, see the following table. Communication method TU2C-LINK (U series) TCC-LINK (other than U series) MMY-M P***...
  • Page 23 When the connected outdoor unit is Super Multi u series (U series) Follow the wiring specifications in the table below even when there is a mix of U series and non-U series in the connected indoor units or remote controllers. Wiring specifications Communication line Item...
  • Page 24 When the connected outdoor units are other than Super Multi u series (U series) Wiring specifications Communication line Item Control wiring between indoor and outdoor units and central control wiring 1.25 mm (up to 1000 m) Wire diameter 2.0 mm (up to 2000 m) Wire type 2-core, non-polar...
  • Page 25 When connecting to a previous model light commercial, air to air heat exchanger, air to water heat pump, or general purpose equipment control interface Follow the wiring specifications in the table below even when there is a mix of U series and non-U series in the connected indoor units or remote controllers.
  • Page 26 The shielded wire of the Uh The shielded wire of the RS-485 To connect 2 cables, Line communication cable communication cable must be earthed on change the preset cable must be earthed on the air address 1 (Modbus interface address SW=1) clamp to the provided one conditioner.
  • Page 27  Wiring connection The following describes a connection example when two or more Modbus Interface units are used. Termination resistance setting (See “7 Switches for setting” for the setting method.) • Set the RS-485 Termination resistance to “120 ohm” for address1 (Modbus Interface address SW1=1) Modbus Interface unit, and set to “open”...

  • Page 28: Switches For Setting

    Switches for setting The following settings are necessary to use Modbus interface. • SW1 Sets the Modbus slave addresses of the Modbus interface. A single Modbus interface uses three Modbus slave addresses. (One address for the current interface and two addresses for potential interfaces.) When two or more Modbus interfaces are used for a single line RS-485 bus, set the addresses as indicated in the table below.
  • Page 29 LED4 LED2 SW1 Modbus interface address set switch LED5 LED3 LED1 Modbus interface address Not used SW2 Test switch (0 usually) Bit1: Uh Line communication setting mode switch. 1 2 3 4 OFF: Normal circumstance; ON: Central controller ID setting mode Bit2: Switches the LED5 display for test runs.
  • Page 30  Central controller ID setting mode The central controller ID setting mode changes the central controller ID of the Modbus interface. (central controller ID at the time of factory shipping is central controller ID 20.) The central controller ID number indicates the Uh Line address and communication priority for the Uh Line compatible central control device.
  • Page 31 (3) Change of central controller ID • Change SW1 to 1-F and press SW4. • If using Modbus interface with a central control device not compatible with Uh Line, set as “old controller.” Central controller ID Central controller ID7 Central controller ID8 Central controller ID9 Central controller ID10 Central controller ID11...

  • Page 32: Test Run

    Test run Start the system to perform operation check by following the procedure below. The air conditioner and TCB-IFCG1TLE connected by the Uh Line are hereinafter called the Uh Line device. 8-1. Preparation Item Details Procedure Preparation Discuss with a customer to determine details of the following.
  • Page 33 8-3. Uh Line communication check Complete the test run of air conditioners before Uh Line communication check.  Before starting Uh Line communication check • Set the indoor unit central control address so that it does not match any other indoor unit addresses. •...
  • Page 34 Indoor unit Indoor unit Indoor unit Indoor unit central control SW2 SW1 central control SW2 SW1 central control SW2 SW1 central control SW2 SW1 address address address address  Uh Line communication check (Header outdoor unit) Check the communication status between Modbus Interface and outdoor unit with LED5. Check that the communication between Modbus Interface and each outdoor unit connected is normally performed by selecting an outdoor unit using SW1 to SW3.
  • Page 35 • The protocol for communication with an outdoor unit is displayed by LED4. Protocol for communication with LED4 Note outdoor unit When Modbus interface is performing communication with In communication via Uh Line the relevant outdoor unit via Uh Line. When Modbus interface is performing communication with In communication based on old Blinking...
  • Page 36 8-4. RS-485 communication check The Modbus Master is needed for RS-485 communications. Check the Modbus Master for details on transmissions. Check the LEDs on the Modbus Interface. Perform the communication status checking between Modbus Interface and Modbus Master. Check that the communication with Modbus Master is normally performed. When bit2 of SW3 is set to “OFF”, the communication status with the Modbus Master is displayed by LED5.

  • Page 37: Troubleshooting

    Troubleshooting 9-1. Uh Line communication trouble Cause Check and action Central control address of indoor unit is not set. Check the “8-3. Uh Line communication check”. Check that the central control address of indoor unit is set. Central control address of indoor unit has been Check the “9-6.
  • Page 38 Cause Check and action The RS-485 baud rate switch setting of the Modbus Check the RS-485 baud rate switch setting of the Modbus Interface and baud Interface does not match. rate setting of the Modbus Master. The switches variable specification setting of the The settings for using BMS-IFMB1280U as TCB-IFMB640TLE or TCB- Modbus Interface does not match.
  • Page 39 9-8. Controlling and monitoring of air to water heat pump (ATW) Cause Solution Mode cannot be changed to cooling through operation Operation modes are only heating and cooling. With cooling mode, status mode setting. may be "no use" depending on the settings of ATW. Control of ATW does not work at all.
  • Page 40 Last setting priority. priority? Is it possible to connect an indoor unit without its remote Possible. controller? Can BMS-IFMB1280U-E be used as TCB-IFMB640TLE Possible. or TCB-IFMB641TLE? The setting method is described in Section "11 TCB-IFMB640TLE, TCB- IFMB641TLE, TCB-IFMB641TLE-SG product replacement".
  • Page 41 Cause Answer Which model of outdoor unit can read cooling capacity This Modbus Interface can be connected with SMMS-7, MiNi-SMMS7, and data? SMMS∞. Products with the following model numbers or later MMY-MAP0807T8P*/T7P MMY-MAP1007T8P*/T7P MMY-MAP1207T8P*/T7P MMY-MAP1407T8P*/T7P Standard MMY-MAP1607T8P*/T7P SMMS-7 MMY-MAP1807T8P*/T7P MMY-MAP2007T8P*/T7P MMY-MAP2207T8P*/T7P MMY-MAP2407T8P*/T7P High efficiency...
  • Page 42 9-10.Controlling and monitoring of VRF Dx-coil controller Cause Solution Dx-coil controller cannot be controlled from the Modbus Controlling the DDC setting type of the VRF Dx-coil controller (TCB- interface with DDC setting type. IFDMX01UP-E, TCB-IFDMR01UP-E) from the Modbus interface is prohibited.

  • Page 43: Product Replacement Procedure In The Case Of Failure

    Product replacement procedure in the case of failure  Service parts There are no service parts for this product. Please procure the product.  Product replacement Perform the same settings for the replacement Modbus Interface as the settings for the various switches of the failed Modbus Interface.

  • Page 44: Tcb-Ifmb640Tle, Tcb-Ifmb641Tle, Tcb-Ifmb641Tle-Sg Product

    / earth wires / communication cables" in this manual.  BMS-IFMB1280U-E setting Set the RS-485 baud rate and the address switches of BMS-IFMB1280U-E according to Section "7 Switches for setting", the same as the installed TCB-IFMB640TLE. (For address 1, set the terminator of the RS-485.) ...
  • Page 45 / earth wires / communication cables" in this manual.  BMS-IFMB1280U-E setting Set the RS-485 baud rate and the address switches of BMS-IFMB1280U-E according to Section "7 Switches for setting", the same as the installed TCB-IFMB641TLE. (For address 1, set the terminator of the RS-485.) ...
  • Page 46 / earth wires / communication cables" in this manual.  BMS-IFMB1280U-E setting Set the RS-485 baud rate and the address switches of BMS-IFMB1280U-E according to Section "7 Switches for setting", the same as the installed TCB-IFMB641TLE-SG. (For address 1, set the terminator of the RS-485.) ...
  • Page 47 This product can be used as BMS-IFMB1280U variable specification mode. IMPORTANT Step 1: Switch Modbus register map to BMS-IFMB1280U-E. (Refer to the following procedure in this section) Step 2: Follow the procedure for "Central controller ID setting mode" (P. 30) to change the central controller ID to “Central controller ID20 (initial value)”...

  • Page 48: Other Settings

    Other settings 12-1.When changing Modbus communication response to 250ms Before performing setting • If setting the Modbus slave address with SW1, make a note of the SW1 value before performing central controller ID setting operations. Setting (1) Set SW2 to 8. (2) When SW1 is set to 2, the Modbus response mode setting is displayed by LED2 to LED5.
  • Page 49 (5) When SW1 is set to 1, the setting is displayed by LED2 to LED5. If you make a mistake in the setting, perform the setting in the order of (3) and (4). After performing setting • Set SW2 to 0. •...
  • Page 50 12-4.Modbus interface operation settings for central control prohibition requests obtained from indoor units The factory default for this setting is “Enable (value 1).” Before performing setting • If setting the Modbus slave address with SW1, make a note of the SW1 value before performing central controller ID setting operations.

  • Page 51: Specifications Manual

    Specifications Manual...

  • Page 52: Modbus Interface

    Specifications Manual Central Control Device Modbus interface Model name: BMS-IFMB1280U-E BMS-IFMB1280U-TR Contents 1 System overview........................1 2 RS 485 communication parameters ..................4 3 Applied function codes....................... 4 4 Exception response ........................5 5 Counters and registers ......................5 6 Sequence........................... 6 7 List of function..........................

  • Page 53: System Overview

    Modbus interface Specifications Manual System overview This manual describes Modbus* protocol implementation specifications of Modbus interface is equipped with the Modbus Slave function. Specifications that are not detailed in this manual conform to the following Modbus specifications. • Modbus APPLICATION PROTOCOL SPECIFICATION V1.1b •...
  • Page 54 Modbus interface Specifications Manual Central control address 1 to 64 Uh Line Central control address 65 to 128 Current Modbus interface No.1 Modbus Master Slave address = 1 Indoor units 1 to 64 are the targets. Potential Modbus interface Slave address = 2 Indoor units 65 to 128 are the targets.
  • Page 55 Modbus interface Specifications Manual An example of connection of the Modbus master device, the Modbus interface, and air conditioners is shown in the diagram below. Terminator Terminator Modbus-Master Modbus-I/F Slave 1 U3 U4 Uh Line Bus …… INDOOR / OUTDOOR TCB-IFCG1TLE RS-485 Bus Modbus-I/F Slave 4...

  • Page 56: Rs 485 Communication Parameters

    Modbus interface Specifications Manual RS 485 communication parameters RS 485 communication parameters are shown below. • Character length = 11 bits, Data = 8 bits, Parity Check = even, Start bit =1 bit low, Stop bit = 1bit high • Communication: 9600/19200/38400 bps selected manually. •...

  • Page 57: Exception Response

    Modbus interface Specifications Manual Exception response Slave units must return an exception response when they receive a request which has been sent correctly but contains an error that applies to any of the following exception codes. Exception code Name 0x01 Illegal function A request of illegal function that is not supported by this specification is received 0x02...

  • Page 58: Sequence

    Modbus interface Specifications Manual Sequence The master device sends a request sequentially to each slave device, and gets response data from each slave device. A slave device returns a response to a request from the master device within one second (see the diagram below).

  • Page 59: List Of Function

    Modbus interface Specifications Manual List of function Products that can be connected to the Modbus Interface are listed below. (1) Applicable air conditioner indoor unit • VRF System - SMMS-i (Super Modular Multi System-i) - SHRM-i (Super Heat Recovery Multi System-i) - SMMS-e (Super Modular Multi System-e) - SHRM-e (Super Heat Recovery Multi System-e) - SMMS 7 (Super Modular Multi System 7)
  • Page 60 Modbus interface Specifications Manual 7-1. List of functions for air conditioner For further details, refer to the Specifications Manual of Modbus Interface. Function Monitoring Controlling ON / OFF   Setting temperature   Auto cool temperature setting   Auto heat temperature setting ...
  • Page 61 Modbus interface Specifications Manual 7-2. List of functions for TCB-IFCG1TLE For further details, refer to the Specifications Manual of Modbus Interface. Function Monitoring Controlling ON / OFF input for TCB-IFCG1TLE  ― Alarm input for TCB-IFCG1TLE  ― Din1 input for TCB-IFCG1TLE ...
  • Page 62 Modbus interface Specifications Manual Special functions Function Monitoring Controlling for ATW Operation mode / Fan range  ― Water temperature control mode / Room temperature control   ― mode status HOT WATER Device Connection status   ― Zone1 Device Connection status ...
  • Page 63 Modbus interface Specifications Manual 7-4. List of functions for Room Air Conditioner TU2C-LINK Interface (RAC) For further details, refer to the Specifications Manual of Modbus Interface. NOTE The RAC Interface model name is RAC TU2C-LINK Interface (TCB-SSRL011UUP-E). (1) RAC Interface is in the “Residential AC type” setting Special functions Function Monitoring...
  • Page 64 Modbus interface Specifications Manual (2) RAC Interface is in the “Manual Light commercial AC type” setting Special functions Function Monitoring Controlling for Residential AC type ON / OFF   Setting temperature   Operation mode   Fan speed ...
  • Page 65 Modbus interface Specifications Manual 7-5. List of functions for VRF Dx-coil controller For further details, refer to the Specifications Manual of Modbus Interface. NOTE • The VRF Dx-coil controller model name is TCB-IFDMX01UP-E, TCB-IFDMR01UP-E. • The functions listed may vary according to the product. •...
  • Page 66 Modbus interface Specifications Manual (2) VRF Dx-coil controller is in the “DDC mode" setting Function Monitoring Controlling ON / OFF  Setting temperature Auto cool temperature setting Auto heat temperature setting Operation mode  Fan speed  HH,H,L,AUTO Louver Remote controller permit / Prohibit ...

  • Page 67: Address Assignment Table

    Modbus interface Specifications Manual Address assignment table 8-1. Indoor unit “Indoor number” in the table below corresponds with the central control address of the indoor unit. When the Modbus interface slave address has been specified for the slave address of the request frame, the target indoor units are units 1 to 64.
  • Page 68 Modbus interface Specifications Manual Modbus Indoor Modbus Data name Length Explanation description number register [ATW]AUTO TEMP operation 1bit Coils (R/W) ON/OFF setting [ATW]Night setback operation 1bit ON/OFF setting Reserved [ATW]Frost protection operation 1bit ON/OFF setting [ATW]Anti Bacteria operation 1bit ON/OFF setting Reserved Reserved [RAC]Hi-Power ON/OFF...
  • Page 69 Modbus interface Specifications Manual Modbus Indoor Modbus Data name Length Explanation description number register 9620 Relay 4ch output for TCB- 1bit Coils (R/W) IFCG1TLE 9621 Local operation prohibit for TCB- 1bit IFCG1TLE 9622 - 9624 Reserved 9625 [ATW]Zone1/2 ON/OFF Setting 1bit 9626 [ATW]HOT WATER ON/OFF...
  • Page 70 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number 10001 ON/OFF setting status 1bit 1=On, 0=Off Discrete input (R) 10002 Filter sign status 1bit 1=abnormal, 0=normal 10003 Alarm status 1bit 1=abnormal, 0=normal 10004 Thermo status 1bit 1=On, 0=Off 10005...
  • Page 71 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number 10217 [ATW]Zone1/2 ON/OFF 1bit Discrete status input (R) 10218 [ATW]HOT WATER ON/ 1bit OFF status 10219 [ATW]AUTO TEMP 1bit operation ON/OFF status 10220 [ATW]Night setback 1bit operation ON/OFF status 10221 Reserved...
  • Page 72 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number 10073+152*(n-1) [ATW]Water temperature 1bit Discrete control mode / Room input (R) temperature control mode status 10074+152*(n-1) [ATW]HOT WATER 1bit Device Connection status 10075+152*(n-1) [ATW]Zone1 Device 1bit Connection status 10076+152*(n-1) [ATW]Zone2 Device...
  • Page 73 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number 19662 - 19728 Reserved Discrete input (R) 19729 - 20000 Reserved...
  • Page 74 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number Input 30001 Room temperature unit: °C register (R) Data type:signed integer Ten times level of temperature Example:20 °C→0x00C8 -5 °C→0xFFCE NOTE In the case of Fresh air intake indoor unit, it is the TF sensor value.
  • Page 75 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number 0x0002=H, 0x0003=M, Input 30044 Ventilation Fan speed 0x0004=Unbalanced register (R) (Only models with Unbalanced enabled) Described in "Note 6" 30045 Ventilation mode/fan speed, valid/invalid unit: °C 30046 [ATW]Zone1 Control Temperature...
  • Page 76 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number 30067 Notice Code 4 0x0000=Notice Code not generated Input register (R) 0x0001~0x00FF=Notice Code 30068 Notice Code 5 0x0000=Notice Code not generated 0x0001~0x00FF=Notice Code 30069 - 30156 Reserved 30157 Room temperature...
  • Page 77 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number Input 30210 [ATW]Zone2 Heating register (R) Mode, water temperature range 30211 [ATW]HOT WATER temperature range 30212 [ATW]Room temperature control mode, Cooling temperature range 30213 [ATW]Room temperature control mode, Heating temperature range 30214...
  • Page 78 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number Input 30033+156(n-1) Heating temperature register (R) range 30034+156(n-1) Dry temperature range 30035+156(n-1) Auto temperature range 30036+156(n-1) Operation mode 30037+156(n-1) Fan speed 30038+156(n-1) Louver 30039+156(n-1) Remote controller permit / Prohibit 30040+156(n-1) Facility request...
  • Page 79 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number 30061+156(n-1) Optional control enabled/ Dual Set Point enabled/disabled (bit4) Input disabled register (R) Reserved (bit7-5, bit3-0) 1=enabled 0=disabled 30062+156(n-1) Auto cool temperature unit: °C setting Data type:signed integer Ten times level of tempera see Note 12 30063+156(n-1)
  • Page 80 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number Input 39875 [ATW]Zone2 Control register (R) Temperature 39876 [ATW]HOT WATER Control Temperature 39877 [ATW]Zone1 Setting temperature status 39878 [ATW]Zone2 Setting temperature status 39879 [ATW]HOT WATER Setting temperature status 39880 [ATW]Zone1/Zone2...
  • Page 81 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number Input 39985 - 39992 Software version BMS-IFMB1280U is expressed in ASCII codes register (R) followed by the version number. Hexadecimal number 100 times the version number x.yy 39993 Interface status...
  • Page 82 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number Holding 40001 Setting temperature unit: °C register Data type:signed integer (R/W) Ten times level of temperature Example:20 °C→0x00C8 -5 °C→0xFFCE 40002 Accumulated operation unit: hour time Monitor on/off of the discrete input register to check the on/off state of all air conditioners every 15 minutes.
  • Page 83 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number Holding 40169 Ventilation Fan speed register 40170 [ATW]Zone1 (R/W) Temperature Setting 40171 [ATW]Zone2 Temperature Setting 40172 [ATW]HOT WATER Temperature Setting 40173 Auto cool temperature unit: °C setting Data type:signed integer Ten times level of tempera...
  • Page 84 Modbus interface Specifications Manual Modbus Indoor Modbus register Data name Length Explanation description number Holding 49845 Auto cool temperature unit: °C register setting Data type:signed integer (R/W) Ten times level of tempera see Note 12 49846 Auto heat temperature unit: °C setting Data type:signed integer Ten times level of tempera...
  • Page 85 Modbus interface Specifications Manual Note 2 • TCB-IFCG1TLE Analog Out 2-channel writing The master device writes a 2-byte two’s complement that is 1000 times of the transmit value. The TCB-IFCG1TLE board value is obtained by dividing a two’s complement of 2-byte received value by 3000. A level in accordance with the value is output from the MPU treating 3.333 as 256 levels.
  • Page 86 Modbus interface Specifications Manual Upper-limit / lower-limit Meaning temperature Temperature setting upper-limit value in dry mode Temperature setting lower-limit value in dry mode Temperature setting upper-limit value in auto mode Temperature setting lower-limit value in auto mode The upper-limit and lower-limit values in the table above are converted to Celsius temperatures using the following formula.
  • Page 87 Modbus interface Specifications Manual Note 8 • "[ATW]Function status" register value is described in the table below. Item Value b15 to b8 Reserved External Thermo Control Status 1=use,0=unused How Water Tank Thermo Control status 1=use,0=unused Anti Bacteria Function Setting staus 1=use,0=unused Reserved Night Set Back Function Setting staus...
  • Page 88 Modbus interface Specifications Manual Note 10 Notes on controlling AIR TO WATER HEAT PUMP (ATW) from Modbus Interface • Operation modes are heating and cooling. With cooling mode, status may be no use depending on the settings of ATW. • When Floor Dry operation ON/OFF status is ON, control of ATW is entirely disabled. •...
  • Page 89 Modbus interface Specifications Manual 8-2. Outdoor unit Outdoor Modbus line Modbus register Date name Length Explanation descriptio address Coils(R/W) 9801 EER start / stop 1bit 1= Start(default),0 =Stop 0 =EER mode(default) 9802 EER data mode 1bit VRF Capacity data 1= Reserved Outdoor Modbus line...
  • Page 90 Modbus interface Specifications Manual Outdoor Modbus line Modbus register Date name Length Explanation descriptio address Communication status between Modbus interface and outdoor unit Line address 32 to 17 1=communication error, 0=no error outdoor communication error 35006 bitmap(upper) bit15:Line address 32 bit14:Line address 31 …...
  • Page 91 Modbus interface Specifications Manual Outdoor Modbus line Modbus register Date name Length Explanation descriptio address 35053 no.19 capacity data Qc (upper) Capacity data for line address 19 [Notes1] 35054 no.19 capacity data Qc (lower) 35055 no.20 capacity data Qc (upper) Capacity data for line address 20 [Notes1] 35056 no.20 capacity data Qc (lower)
  • Page 92 Modbus interface Specifications Manual Note 1 • <Example> 35017 0x0001, 35018 0x1001 → [Hex]0x0001 0x1001 → [Dec] 69633 • In the case of outdoor unit stop, a value is set to 0x0000. • In the case of outdoor unit communication error, a value is set to 0x8000. upper 0x8000, lower 0x8000 •...

  • Page 93: Appendix

    Modbus interface Specifications Manual Appendix 9-1. Check Code (VRF system, Light Commercial mode) Check Code Description Hexadecimal Main remote number controller display No active error Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved...
  • Page 94 Modbus interface Specifications Manual Check Code Description Hexadecimal Main remote number controller display Reserved Reserved Reserved Batch alarm of general-purpose equipment control interface Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved...
  • Page 95 Modbus interface Specifications Manual Check Code Description Hexadecimal Main remote number controller display Header thermal storage units quantity error Decease of No. of thermal storage units Sending error in communication between outdoor units Reserved Duplicated follower outdoor address Decrease of No. of connected outdoor units Reserved Follower outdoor unit error Reserved...
  • Page 96 Modbus interface Specifications Manual Check Code Description Hexadecimal Main remote number controller display Compressor break down Magnet switch / Overcurrent operation / Compressor error Current detection circuit error Comp-1 case thermo operation Outdoor temp. sensor misconnection (TD1) Low pressure protective operation Low oil level protection Oil level temp.
  • Page 97 Modbus interface Specifications Manual Check Code Description Hexadecimal Main remote number controller display Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Refrigerant leak sensor error Refrigerant leak detection Refrigerant leak sensor life Reserved Reserved Inconsistency error of outdoor units...
  • Page 98 Compressor energization error Active filter error Active filter miswiring Comp position detection circuit error Group terminal unit error Follower indoor unit error (Group error) In case you detect an error code not listed, contact your nearest Toshiba technical support service.
  • Page 99 Modbus interface Specifications Manual 9-2. Check Code (Air to water heat pump model) Check Code Description Hexadecimal Main remote number controller display No active error Pump or flowing quantity error Temperature increase error (Heating) Temperature increase error (Hot Water Supply) Antifreeze operation (1) Piping antifreeze operation Pressure switch operation...
  • Page 100 Short circuit of the compressor driver element error Compressor rotor position error Slave Hydro unit error which occurs when error occurs in master Hydro unit In case you detect an error code not listed, contact your nearest Toshiba technical support service.
  • Page 101 Modbus interface Specifications Manual 9-3. Check Code (Room Air Conditioner TU2C-LINK Interface) (1) Light commercial AC type Check Code Description Hexadecimal Main remote number controller display No active error Batch alarm of general-purpose equipment control interface Communication circuit error between indoor and outdoor Indoor TCJ sensor error Indoor TC1 sensor error TD1 sensor error...
  • Page 102 Modbus interface Specifications Manual (2) Residential AC type Check Code Description Hexadecimal Main remote number controller display 4004 Serial signal error 4007 Case thermo error 400C TA sensor (Room temperature sensor) error 400D TC sensor (Heat exchanger temperature sensor) error 400E Refrigerant leak sensor error 400F...
  • Page 103 Modbus interface Specifications Manual 9-4. Notice Code Notice Code Description Hexadecimal Main remote number controller display Compressor maintenance timer over NFC tag wiring trouble Battery life / deterioration / abnormality Refrigerant sensor life pre-notification General-purpose temperature sensor error Group terminal unit notice...
  • Page 104 Installation Manual...

  • Page 105: Modbus Interface

    Installation Manual Central Control Device For commercial use Modbus interface Model name: BMS-IFMB1280U-E BMS-IFMB1280U-TR Multilingual installation manuals [ългарски] Ръководство за монтаж Изтегляне / [Česky] Stažení montážní příručky / [Dansk] Installationsvejledning, Download / [Deutsch] Installationshandbuch Herunterladen / [Ελληνικά] Λήψη Εγχειριδίου εγκατάστασης / [English] Installation manual Download / [Español] Descarga del Manual de instalación / [Eesti]...
  • Page 106 Modbus interface Installation Manual • Thank you very much for purchasing this TOSHIBA Modbus interface. • Please read this manual carefully beforehand for proper installation of the Modbus interface. “AEEE Yönetmeligine Uygundur.” Contents 1 Precautions for safety ..........2 2 Introduction .

  • Page 107: Precautions For Safety

    Modbus interface Installation Manual Precautions for safety • Read these “Precautions for Safety” carefully before installation. • The precautions described below include important items regarding safety. Observe them without fail. Understand the following details (indications and symbols) before reading the body text, and follow the instructions.

  • Page 108: Introduction

    Modbus interface Installation Manual Introduction  Applications / Functions / Specifications Applications • The Modbus interface is used to connect air conditioners “with TU2C-LINK Uh Line (hereinafter, referred to as Uh Line) installed” and TCB-IFCG1TLE to Modbus* system. Functions • The Modbus interface converts signals between Uh Line and Modbus Master. Specifications Power supply 220 - 240 VAC, 50/60 Hz...

  • Page 109: Before Installation

    Modbus interface Installation Manual Before installation Check the following package contents. Item Quantity Remarks Modbus interface Installation Manual Screw M4 x 12 mm tapping screws Cable clamp Use the following wiring materials to connect the communication cables and power cables. (locally procured) Line Description Type...

  • Page 110: Connection Of Power Cables / Earth Wires / Communication Cables

    Modbus interface Installation Manual Connection of power cables / earth wires / communication cables CAUTION • The RS-485 communication cables have polarity. Connect A(+) to A(+), and B(-) to B(-). If connected with incorrect polarity, the unit will not work. •...
  • Page 111 Modbus interface Installation Manual Termination resistance setting • TU2C-LINK / TCC-LINK termination resistance setting ....<For TCC-LINK> Leave just 1 line of the termination resistance in the interface board of the outdoor unit (centre unit) ON, and turn all the others OFF. (Refer to the wiring diagram attached to the outdoor unit for the position of SW.) <For TU2C-LINK>...
  • Page 112 Modbus interface Installation Manual  Design of Control Wiring Communication method and model name The TU2C-LINK model (U series) can be used together with previous models (other than U series). For details of the model and communication method, see the following table. Communication method TU2C-LINK (U series) TCC-LINK (other than U series)
  • Page 113 Modbus interface Installation Manual When the connected outdoor unit is Super Multi u series (U series) Follow the wiring specifications in the table below even when there is a mix of U series and non-U series in the connected indoor units or remote controllers.
  • Page 114 Modbus interface Installation Manual When the connected outdoor units are other than Super Multi u series (U series) Wiring specifications Communication line Item Control wiring between indoor and outdoor units and central control wiring 1.25 mm (up to 1000 m) Wire diameter 2.0 mm (up to 2000 m)
  • Page 115 Modbus interface Installation Manual When connecting to a previous model light commercial, air to air heat exchanger, air to water heat pump, or general purpose equipment control interface Follow the wiring specifications in the table below even when there is a mix of U series and non-U series in the connected indoor units or remote controllers.
  • Page 116 Modbus interface Installation Manual The shielded wire of the Uh The shielded wire of the RS-485 To connect 2 cables, Line communication cable communication cable must be earthed on change the preset cable must be earthed on the air address 1 (Modbus interface address SW=1) clamp to the provided one conditioner.
  • Page 117 Modbus interface Installation Manual Do not connect the shielded wire of Uh Line communication cable to the earth. Set the RS-485 termination resistance on LINK(Uh) U3 and Modbus-Master the address1 unit (Modbus interface U4 have no polarity. (Locally procured) address SW1=1) and host system. Do not set it here.

  • Page 118: Setting

    Modbus interface Installation Manual Setting The following settings are necessary to use Modbus interface. • SW1 Sets the Modbus slave addresses of the Modbus interface. A single Modbus interface uses three Modbus slave addresses. (One address for the current interface and two addresses for potential interfaces.) When two or more Modbus interfaces are used for a single line RS-485 bus, set the addresses as indicated in the table below.
  • Page 119 Modbus interface Installation Manual LED4 LED2 SW1 Modbus interface address set switch LED5 LED3 LED1 Modbus interface address Not used SW2 Test switch (0 usually) Bit1: Uh Line communication setting mode switch. 1 2 3 4 OFF: Normal circumstance; ON: Central controller ID setting mode Bit2: Switches the LED5 display for test runs.
  • Page 120 Modbus interface Installation Manual  Central controller ID setting mode The central controller ID setting mode changes the central controller ID of the Modbus interface. (central controller ID at the time of factory shipping is central controller ID 20.) The central controller ID number indicates the Uh Line address and communication priority for the Uh Line compatible central control device.
  • Page 121 Modbus interface Installation Manual (3) Change of central controller ID • Change SW1 to 1-F and press SW4. • If using Modbus interface with a central control device not compatible with Uh Line, set as “old controller.” Central controller ID Central controller ID7 Central controller ID8 Central controller ID9...

  • Page 122: Test Run Check

    Modbus interface Installation Manual Test run check  Before starting test run • Set the indoor unit central control address so that it does not match any other indoor unit addresses. • Be sure to press the reset switch SW7 on the Modbus interface when the indoor unit central control address setting has been changed or added.
  • Page 123 Modbus interface Installation Manual Indoor unit Indoor unit Indoor unit Indoor unit central control SW2 SW1 central control SW2 SW1 central control SW2 SW1 central control SW2 SW1 address address address address (2) Check the communication status between Modbus Interface and outdoor unit with LED5. Check that the communication between Modbus Interface and each outdoor unit connected is normally performed by selecting an outdoor unit using SW1 to SW3.
  • Page 124 Modbus interface Installation Manual Line address of outdoor unit and SW1/SW2 setting Line address of outdoor unit Line address of outdoor unit NOTE For air conditioner (multi type), the line addresses of outdoor unit 29 to 32 are not used. (3) Perform the communication status checking between Modbus interface and Modbus Master.
  • Page 125 Modbus interface Installation Manual Manufacturer / Importer 20-EN...
  • Page 126 ©2024 Carrier. All Rights Reserved. Revision record Number The contents of modification Page Date First issue May, 2021 Revision 1 Added mention of air to water heat pump. 7,10,12,13, 16,17,18,19,2 Nov., 2021 Updated Installation Manual and 0,22,34 Specifications Manual. Revision 2 Added mention of Energy Efficiency Ratio.

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