HMS Intesis Modbus Server User manual

Hitachi VRF Air Conditioning
Gateway for the integration of Hitachi VRF systems into Modbus (RTU and TCP)
systems
USER MANUAL
Issue date: 11/2018 r1.0 ENGLISH

IntesisTM Modbus Server –HITACHI VRF User Manual r1.0 EN
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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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Gateway for the integration of Hitachi VRF systems into Modbus
(RTU and TCP) systems.
ORDER CODE
LEGACY ORDER CODE
INMBSHIT016O000
HI-AC-MBS-16
INMBSHIT064O000
HI-AC-MBS-64

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INDEX
1. Description............................................................................................................................................................ 5
Introduction................................................................................................................................................... 5
1.1 Functionality..................................................................................................................................................... 6
Capacity of Intesis......................................................................................................................................... 7
2. Modbus interface.................................................................................................................................................. 8
Functions supported ..................................................................................................................................... 8
Modbus RTU................................................................................................................................................. 8
Modbus TCP................................................................................................................................................. 8
Modbus Address Map................................................................................................................................... 9
3. Connections........................................................................................................................................................ 12
Power device .............................................................................................................................................. 13
Connect to Hitachi VRF installation............................................................................................................ 13
Connection to Modbus................................................................................................................................ 13
1.9.1 Modbus TCP ....................................................................................................................................... 13
1.9.2 Modbus RTU....................................................................................................................................... 13
Connection to PC (Configuration tool)........................................................................................................ 14
4. Set-up process and troubleshooting................................................................................................................... 15
Pre-requisites.............................................................................................................................................. 15
Intesis MAPS. Configuration & monitoring tool for Intesis Modbus series ................................................. 15
1.12.1 Introduction.......................................................................................................................................... 15
1.12.2 Connection.......................................................................................................................................... 15
1.12.3 Configuration tab................................................................................................................................. 16
1.12.4 Modbus Slave configuration................................................................................................................ 16
1.12.5 Hitachi configuration............................................................................................................................ 18
1.12.6 Signals................................................................................................................................................. 20
1.12.7 Sending the configuration to Intesis.................................................................................................... 21
1.12.8 Diagnostic............................................................................................................................................ 21
1.12.9 Set-up procedure ................................................................................................................................ 22
5. Electrical & Mechanical Features....................................................................................................................... 24
6. Dimensions......................................................................................................................................................... 25
7. AC Unit Types compatibility................................................................................................................................ 26
8. Error codes for Indoor and Outdoor Units.......................................................................................................... 27

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1. Description
Introduction
This document describes the integration of Hitachi VRF air conditioning systems into Modbus compatible devices
and systems using using gateway the Intesis Modbus Server to Hitachi VRF communication gateway.
The aim of this integration is to monitor and control Hitachi air conditioning systems, remotely, from a Control Center
using any commercial SCADA or monitoring software that includes a Modbus Master driver (RTU and/or TCP). To
do it so, Intesis performs as a Modbus Server, allowing poll and write requests from any Modbus master device.
Intesis makes available the Hitachi air conditioning system indoor units’ datapoints through independent Modbus
registers.
Up to 64 indoor units supported, depending on product version.
This document assumes that the user is familiar with Modbus and Hitachi technologies and their technical terms.
Integration of Hitachi’s compatible systems into Modbus systems

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1.1 Functionality
IntesisTM continuously monitors Hitachi VRF network for all configured signals and keeps the updated status of all
of them in its memory, ready to be served when requested from the Modbus master.
Commands toward the indoor units are permitted.
Each indoor unit is offered as a set of MBS objects.
Element
Object supported
Outdoor Unit
•Status
Indoor Unit
•Status
•Command
•Communication
status
General signals
(all units)
•Command

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Capacity of Intesis
Element
Max.
Notes
Number of indoor units
64 *
Number of indoor units that can be controlled through Intesis
* There are different models of Intesis MBS –Hitachi VRF each one with different capacity. The table above shows
the capacity for the top model (with maximum capacity).
Their order codes are:
▪INMBSHIT016O000: Model supporting up to 16 indoor units
▪INMBSHIT064O000: Model supporting up to 64 indoor units

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2. Modbus interface
In this section, a common description for all Intesis Modbus series gateways is given, from the point of view of
Modbus system which is called from now on internal system. Connection with the Hitachi VRF system is also called
from now on external system.
Functions supported
This part is common for Modbus RTU and TCP.
Modbus functions 03 and 04 (Read Holding Registers and Read Input Registers) can be used to read Modbus
registers.
Modbus functions 06 and 16 (Single Multiple Holding Registers and Write Multiple Holding Registers) can be used
to write Modbus registers.
Configuration of poll records is possible between Modbus addresses 0 and 20000. Addresses that are not defined
in section 2.2 (Modbus map of the device) are read-only and will always report 0.
Modbus error codes are supported, they will be sent whenever a non-valid Modbus address is queried.
All registers are 16-bit signed integer, in standard Modbus Big Endian (MSB/LSB) format.
Intesis supports Modbus RTU and Modbus TCP and both interfaces can be used simultaneously.
Modbus RTU
Both EIA485 and EIA232 physical layers are supported. Only the lines RX, TX and GND of the EIA232 connector
are used (TX and RX for EIA485).
Baud rate can be selected between 1200, 2400, 4800, 9600, 19200, 38400, 56700 and 115200. Parity (none, even
or odd) and stop bits (1 or 2) can be selected as well.
Modbus slave number must be configured and the physical connection (RS232 or RS485) can also be selected
Modbus TCP
TCP port to use (default is 502) and keep alive period must be configured.
IP settings of Intesis (DHCP status, own IP, net mask and default gateway) must be configured as well.

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Modbus Address Map
Modbus address from the formula is expressed in link layer format. This is, first register address is 0.
Modbus Address
First Address is 0
Read
/Write
Register/signal name
Possible values
0
W
On (all the units)
1-Set all the units On
1
W
Off (all the units)
1-Set all the units Off
2
W
Operation Mode Auto (all the units)
1-Set Auto Mode
3
W
Operation Mode Heat (all the units)
1-Set Heat Mode
4
W
Operation Mode Dry (all the units)
1-Set Dry Mode
5
W
Operation Mode Fan (all the units)
1-Set Fan Mode
6
W
Operation Mode Cool (all the units)
1-Set Cool Mode
7
W
Fan Speed Auto
(all the units)
1-Set Fan Speed Auto
8
W
Fan Speed Low
(all the units)
1-Set Fan Speed Low
9
W
Fan Speed Mid (all the units)
1-Set Fan Speed Mid
10
W
Fan Speed High (all the units)
1-Set Fan Speed High
11
W
Fan Speed High+ (all the units)
1-Set Fan Speed High+
12
W
Vane Position Auto (all the units)
1-Set Vane Position Auto
13
W
Vane Position 1 (all the units)
1-Set Vane Position 1
14
W
Vane Position 2 (all the units)
1-Set Vane Position 2
15
W
Vane Position 3 (all the units)
1-Set Vane Position 3
16
W
Vane Position 4 (all the units)
1-Set Vane Position 4
17
W
Vane Position 5 (all the units)
1-Set Vane Position 5
18
W
Vane Position 6 (all the units)
1-Set Vane Position 6
19
W
Vane Position 7 (all the units)
1-Set Vane Position 7

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20
W
Temperature Setpoint (x10ºC) (all units)
Cool: 19..30°C; Heat: 17..30°C
(OU*25)+10000+0
OU stands for Outdoor Unit
address from 1 to 64.
R
Communication Error OU
0-No error, 1-Error
(OU*25)+10000+1
R
Outdoor Air Temp.
-50..99 ºC
(OU*25)+10000+2
R
Comp.Top Temp.
0..200 ºC
(OU*25)+10000+3
R
Total Real Comp. Freq.
0..255 Hz
(OU*25)+10000+4
R
Total Comp. Current
0..255 A
(OU*25)+10000+5
R
Out Exp. Valve 1 Open
0..100 %
(OU*25)+10000+6
R
Discharge Pressure (x10ºC)
-5.0..9.9 MPa
(OU*25)+10000+7
R
Suction Pressure (x10ºC)
-5.0..9.9 MPa
(Ui*100)+0
Ui stands for Unit index number
as found in the Units
Configuration tab and ranges
from 1 to 64.
R/W
On/Off
0-Off, 1-On
(Ui*100)+1
R/W
Operation Mode
0-Auto, 1-Heat, 2-Dry. 3-Fan, 4-Cool
(Ui*100)+2
R/W
Fan Speed
0-Auto, 1-Low, 2-Mid, 3-High, 3-High+
(Ui*100)+3
R/W
Vane Position
0-Auto, 1-Pos1..7-Pos7
(Ui*100)+4
R/W
Temperature Setpoint (x10ºC)
Cool:19..30°C; Heat:17..30°C
(Ui*100)+5
R
Remote Sensor Temp. (x10ºC)
-63..63ºC
(Ui*100)+6
R
Inlet Temp. (x10ºC)
-63..63ºC
(Ui*100)+7
R
Outlet Temp. (x10ºC)
-63..63ºC
(Ui*100)+8
R
GasPipe Temp. (x10ºC)
-63..63ºC
(Ui*100)+9
R
LiquidPipe Temp. (x10ºC)
-63..63ºC
(Ui*100)+10
R
Unit Error code
Error code
(Ui*100)+11
R
Filter Alarm
0-Normal, 1-Alarm
(Ui*100)+12
W
Filter Alarm Reset
1-Reset
(Ui*100)+13
R
Communication Status
0-Not Exit, 1-Exist

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(Ui*100)+14
R/W
Allow On/Off from RC
0-Allow, 1-Not allow
(Ui*100)+15
R/W
Allow Mode from RC
0-Allow, 1-Not allow
(Ui*100)+16
R/W
Allow Setpoint from RC
0-Allow, 1-Not allow
(Ui*100)+17
R/W
Allow Fan from RC
0-Allow, 1-Not allow
(Ui*100)+18
R
Unit Type
0:Not Defined,1-SS,2-FC,3-VRF,4-
IU,5-ES
(Ui*100)+19
R
Unit Address
1..64
(Ui*100)+20
R
System Address
1..64
(Ui*100)+21
R
Dehumidification
0-Disabled, 1-Enabled
(Ui*100)+22
R/W
Dehumidification Correction
0-0, 1-(-1), 2-(-2)
(Ui*100)+23
R
Compresor Stop Cause
255-Operation Off, Other-See manual
(Ui*100)+24
R
Expansion Valve Open
0..100%
(Ui*100)+25
R
Operation Condition
0-Off, 1-Thermo Off, 2-Thermo On, 3-
Alarm
(Ui*100)+26
R
RC SW Temperature (x10ºC)
-63..63ºC
(Ui*100)+27
R
RC SW Config
0-Without RCS, 1-With RCS

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3. Connections
Find below information regarding the Intesis connections available.
Power Supply
Must use NEC Class 2 or Limited Power Source (LPS) and
SELV rated power supply.
If using DC power supply:
Respect polarity applied of terminals (+) and (-). Be sure the
voltage applied is within the range admitted (check table
below). The power supply can be connected to earth but
only through the negative terminal, never through the
positive terminal.
If using AC power supply:
Make sure the voltage applied is of the value admitted (24
Vac). Do not connect any of the terminals of the AC power
supply to earth, and make sure the same power supply is
not supplying any other device.
Ethernet / Modbus TCP (TCP) / Console (UDP & TCP)
Connect the cable coming from the IP network to the
connector ETH of the gateway. Use an Ethernet CAT5
cable. If communicating through the LAN of the building,
contact the network administrator and make sure traffic on
the port used is allowed through all the LAN path (check the
gateway user manual for more information). Default IP is
192.168.100.246. DHCP is enabled by default.
PortA / H-Link Hitachi
Connect the H-Link terminals (TB2) of Hitachi Outdoor Unit to the connectors A3 and A4 of gateway’s PortA.
There is no polarity to be respected.
PortB / Modbus-RTU RS485
Connect the EIA485 bus to connectors B1 (B+), B2 (A-) and B3 (SNGD) of gateway’s PortB. Respect the polarity.
Remember the characteristics of the standard EIA485 bus: maximum distance of 1200 meters, maximum 32 devices
connected to the bus, and in each end of the bus it must be a termination resistor of 120 Ω. Bus biasing and
termination resistor for EIA485 can be enabled for PortB by means of a dedicated DIP:
SW1: ON: 120 Ω termination active
OFF: 120 Ω termination inactive (Default setting).
SW2+3:
ON: Polarization active
OFF: Polarization inactive (Default setting).
If the gateway is installed in one bus end, make sure that termination is active.
Console Port
Connect a mini-type B USB cable from your computer to the gateway to allow communication between the
Configuration Software and the gateway. Remember that Ethernet connection is also allowed. Check the user
manual for more information.
USB
Connect a USB storage device (not a HDD) if required. Check the user manual for more information.
Ensure proper space for all connectors when mounted (see section 6).

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Power device
The first step to perform is to power up the device. To do so, a power supply working with any of the voltage range
allowed is needed (check section 5). Once connected the ON led will turn on.
WARNING! In order to avoid earth loops that can damage the gateway, and/or any other equipment connected to
it, we strongly recommend:
•The use of DC power supplies, floating or with the negative terminal connected to earth. Never use a
DC power supply with the positive terminal connected to earth.
•The use of AC power supplies only if they are floating and not powering any other device.
Connect to Hitachi VRF installation
Use the PortA connector in the top corner of the Intesis device in order to connect H-Link bus to the Intesis.
Remember to follow all safety precautions indicated by Hitachi.
Connect the Hitachi H-Link/TB2 bus to connectors A3 and A4 of gateway’s PortA. Bus is not sensitive to polarity.
Connection to Modbus
1.9.1 Modbus TCP
The gateways Ethernet port connection is used for Modbus TCP communication. Connect the communication cable
coming from the network hub or switch to the Ethernet port of Intesis. The cable to be used shall be a straight
Ethernet UTP/FTP CAT5 cable.
TCP port to use (default 502) and keep alive period must be configured.
IP settings of the gateway (DHCP status, own IP, netmask and default gateway) must be configured as well.
1.9.2 Modbus RTU
Connect the communication cable coming from the motbus network to the port marked as Port B of the Intesis.
Connect the EIA485 bus to connectors B1 (-), B2 (+) and B3 (SNGD) of gateway’s PortB. Respect the polarity.
Remember the characteristics of the standard EIA485 bus: maximum distance of 1200 meters, maximum 32 devices
(without repeaters) connected to the bus, and in each end of the bus it must be a termination resistor of 120 Ω. The
gateway has an internal bus biasing circuit that incorporates the termination resistor. Bus biasing and termination
resistor for EIA485 can be enabled for PortB by means of a dedicated DIP switch.

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Connection to PC (Configuration tool)
This action allows the user to have access to configuration and monitoring of the device (more information can be
found in the configuration tool User Manual). Two methods to connect to the PC can be used:
•Ethernet: Using the Ethernet port of Intesis.
•USB: Using the console port of Intesis, connect a USB cable from the console port to the PC.

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4. Set-up process and troubleshooting
Pre-requisites
It is necessary to have the Modbus RTU or TCP master/client device (BMS side device) operative and properly
connected to the corresponding port of the gateway and the Hitachi VRF installation connected to their
corresponding ports as well.
Connectors, connection cables, PC for the Configuration Tool usage and other auxiliary material, if needed, are not
supplied by Intesis for this standard integration.
Items supplied by HMS Networks for this integration are:
•Intesis gateway.
•Link to download the configuration tool.
•USB Console cable to communicate with Intesis.
•Product documentation.
Intesis MAPS. Configuration & monitoring tool for Intesis Modbus series
1.12.1 Introduction
Intesis MAPS is a Windows®compatible software developed specifically to monitor and configure Intesis new
generation gateways.
The installation procedure and main functions are explained in the Intesis MAPS User Manual. This document can
be downloaded from the link indicated in the installation sheet supplied with the Intesis device or in the product
website at www.intesis.com
In this section, only the specific case of Hitachi VRF to Modbus systems will be covered.
Please check the Intesis MAPS User Manual for specific information about the different parameters and how to
configure them.
1.12.2 Connection
To configure the Intesis connection parameters press on the Connection button in the menu bar.
Figure 4.1 MAPS connection

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1.12.3 Configuration tab
Select the Configuration tab to configure the connection parameters. Three subsets of information are shown in
this window: General (Gateway general parameters), Modbus Slave (Modbus interface configuration) and Hitachi
(Hitachi interface parameters).
Figure 4.2 Intesis MAPS configuration tab
1.12.4 Modbus Slave configuration
Set parameters of Modbus Slave interface of Intesis.

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Figure 4.3 Intesis MAPS Modbus configuration tab
1. Modbus Configuration
1.1.Modbus type selection. Select RTU, TCP or simultaneous RTU and TCP communication.
2. TCP Configuration.
2.1. Modbus TCP Port: Modbus TCP communication port setting. Default port 502.
2.2. Keep Alive. Set the time of inactivity to send a keep Alive message. Default 10 minutes.
3. RTU Configuration.
3.1. RTU bus connection type. Select the RTU connection type serial bus RS485 or 232.
3.2 Baudrate. Set the RTU bus communication speed. Default: 9600 bps.
•Available values: 1200, 2400, 4800, 9600,19200, 38400, 57600, 115200 bps.
3.3 Data Type. Set the Data-bit/parity/stop-bit. Default: 8bit/None/1.
•Available selection: 8bit/None/1, 8bit/Even/1, 8bit/Odd/1, 8bit/None/2.
3.4 Slave Number. Set the Modbus Slave address. Default slave address: 1.
•Valid address: 1..255.

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1.12.5 Hitachi configuration
Set parameters for connection with Hitachi’s installation.
Figure 4.4 Intesis MAPS Hitachi configuration tab
In Units Configuration section you need to enter, for each unit:
•Active. If it’s active (checkbox at Unit xx), ranging from 1 to 64 indoor units that will be integrated (maximum
number of units will depend on Intesis model)
•IU address. Address 1..64 of Unit in Hitachi H-Link bus.
•OU address. Address 1..64 of Outdoor Unit in Hitachi H-Link bus.
•Description. Descriptive name to easy identification of the unit (for example, ‘living room floor 1 unit’, etc).
Additional to manual entry of each unit, autodiscover of present units in an H-Link installation is possible. To do so,
click button Scan. Following window will appear:

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Figure 4.5 Intesis MAPS Scan Hitachi Units window
By pressing Scan button, connected Hitachi H-Link bus will be scanned for available units. Error window will appear
if there is a problem in the connection with H-Link bus (units not powered, bus not connected, …).
A progress bar will appear during the scan, which will take up to a few minutes. After scan is complected, detected
units will be shown in available units as follows:
Figure 4.6 Intesis MAPS Scan Hitachi Units window with scan results
Select with its checkbox units to add (or replace) in installation, according to selection Replace Units / Add Units.
After units to be integrated are selected, click button Apply, and changes will appear in previous Units
Configuration window.

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Figure 4.7 Intesis MAPS Hitachi configuration tab after importing scan results
1.12.6 Signals
All available Modbus registers, its corresponding description and other main parmaters are listed in the signals tab.
Figure 4.8 Intesis MAPS Signals tab