HMS INTESIS INMBSPAN001A000 User manual

Modbus RTU (EIA-485) Interface for Panasonic
Air to Water systems
Compatible with Panasonic Aquarea H generation models
USER MANUAL
Issue date: 05/2020 r1.3 ENGLISH

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Modbus RTU (EIA-485) Interface for Panasonic Air to
Water systems
Compatible with Panasonic Aquarea H generation models
ORDER CODE
LEGACY ORDER CODE
INMBSPAN001A000
PA-AW2-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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INDEX
1. Presentation .......................................................................................................... 5
2. Connection............................................................................................................ 6
2.1 Connection to the Hydro 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 General System Control ................................................................................. 8
4.2.2 Zones.......................................................................................................... 9
4.2.3 Tank Configuration...................................................................................... 10
4.2.4 Consumption .............................................................................................. 11
4.2.5 Maintenance............................................................................................... 11
4.2.6 Unit Configuration....................................................................................... 11
4.2.7 Considerations on Temperature Registers ...................................................... 12
4.2.8 Zones........................................................................................................ 12
4.3 DIP-switch Configuration Interface ...................................................................... 13
4.4 Implemented Functions ..................................................................................... 17
4.5 Device LED indicator ......................................................................................... 17
4.6 EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism ...................... 18
5. Electrical and Mechanical features .......................................................................... 19
6. List of supported Hydro Unit Types......................................................................... 20
7. Error Codes ......................................................................................................... 21

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INMBSPAN001A000
INMBSPAN001A000
INMBSPAN001A000
1. Presentation
The INMBSPAN001A000 interface allows a complete and natural integration of
Panasonic Air-to-Water Systems into Modbus RTU (EIA-485) networks.
Compatible with Aquarea H models from Panasonic
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 Hydro unit.
•External power not required.
•Direct connection to Modbus RTU (EIA-485) networks. Up to 63 INMBSPAN001A000 devices
can be connected in the same network.
INMBSPAN001A000 is a Modbus slave device.
•Direct connection to the Hydro unit. Up to 1 Hydro unit can be connected to
INMBSPAN001A000. The cable for this connection is also supplied.
•Configuration from both on-board DIP-switches and Modbus RTU.
•Total Control and Supervision.
•Real states of the Hydro unit's internal variables.
•Allows simultaneous use of the remote controls of the Hydro unit and Modbus RTU.
*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.
Up to 63
Hydro
units*
Modbus RTU
EIA-485 network
Modbus
RTU
Master
device
•SCADA
•PLC
•DDC
•BMS
•HMI
•Controller
•etc

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Figure 2.1 INMBSPAN001A000 connection diagram
2. Connection
The interface comes with a specific cable and connector to establish direct connection with the
Aquarea H Generation’s system. 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 Connection to the Hydro unit
To connect the INMBSPAN001A000 interface with the Hydro unit, these steps must be followed:
Disconnect Mains Power from the Hydro unit. Open the front cover of the Hydro unit to have
access to the electronic circuit. Once the electronic circuit is reached, locate the socket
connector marked as CN-CNT.
Take the cable that comes with the interface, insert one of its connectors (the one installed in
the shortest uncovered part) into the socket of the INMBSPAN001A000, and the other connector
(the one installed in the largest uncovered part) to the socket CN-CNT of the Hydro unit's
electronic circuit. You can place the INMBSPAN001A000 inside or outside the Hydro unit
depending on your needs. Remember that the INMBSPAN001A000 must also be connected to
the Modbus RTU EIA-485 network. Close the Hydro unit's front cover again to finish the
connection.
Do not modify the length of the cable supplied with the interface, it may affect the correct
interface´s operation.
2.2 Connection to the EIA-485 bus
Connect the EIA-485 bus wires to the plug-in terminal block of INMBSPAN001A000 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 120Ωmust be present at each end of the bus to avoid signal reflections.
The bus needs a fail-safe biasing mechanism (see section 4.6 for more details).
CN-CNT
Hydro unit
Internal control board
200 mm / 7.9”
40 mm / 1.6”
Connection cable
supplied with the
interface.
Fixing screw
90 mm / 3.5”
MODBUS RTU
EIA-485
Bus
EIA485
A B
Hydro
Unit
53 mm / 2.1”
For wall mounting,
extract the upper
and lower staples
until you hear the
"click".
Use these holes to
attach the cable
using the staple and
screw provided.

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3. Quick Start Guide
1. Disconnect the Hydro unit from the Mains Power.
2. Attach the interface next to the Hydro unit (wall mounting) following the instructions of
the diagram above or install it inside the Hydro unit (respect the safety instructions
given by Panasonic).
3. Connect the provided cable of the Panasonic interface between the Hydro unit and the
Intesis interface following the instructions of the diagram above.
4. Connect the EIA-485 bus to the connector EIA485 of the interface.
5. Close the Hydro indoor unit.
6. Check the DIP-Switch configuration of the Intesis interface and make sure it matches the
current installation’s parameters (see section 4.3).
By default, the interface is set to:
▪Modbus Slave Address ➔1
▪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 Hydro unit system to Mains Power.
IMPORTANT: The Intesis interface requires to be connected to the Hydro unit
(powered) to start communicating.
ON
ON
SW3
SW4

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4. Modbus Interface Specification
4.1 Modbus physical layer
INMBSPAN001A000 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 standard Modbus big
endian notation.
4.2.1 General System Control
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
0
1
R/W
System On/Off
▪0: Off
▪1: On (Default)
1
2
R
Outdoor temperature 1,2
▪-127..127ºC (ºC/x10ºC)
▪-260.6..260.6ºF
2
3
R
Outlet water temperature 1,2
▪0..127ºC (ºC/x10ºC)
▪32..260.6ºF
3
4
R
Inlet water temperature 1,2
▪0..127ºC (ºC/x10ºC)
▪32..260.6ºF
4
5
R/W
Operating mode
▪1: Heat
▪2: Heat Tank
▪3: Tank
▪4: Cool Tank
▪5: Cool
▪6: Auto (Default)
R
▪7: Auto Tank
▪8: Auto Heat
▪9: Auto Heat Tank
▪10: Auto Cool
▪11: Auto Cool Tank
5
6
R/W
Heat mode water temp. setting method
▪1: Compensation curve
▪2: Direct (Default)
6
7
R/W
Cool mode water temp. setting method
▪1: Compensation curve
▪2: Direct (Default)
1
Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit.
2
It is not possible turn to x10 the value shown in Fahrenheit.

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4.2.2 Zones
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
9
10
R/W
Zone 1/Zone 2 On/Off 3
▪1: On/Off
▪2: Off/On
▪3: On/On
10
11
R
Zone 1 sensors 3,4
▪1: Water temperature
▪2: External room sensor
▪3: Internal room sensor
▪4: Room thermistor
▪5: Pool Sensor
11
12
R
Zone 2 sensors 3,4
▪1: Water temperature
▪2: External room sensor
▪3: Internal room sensor
▪4: Room thermistor
▪5: Pool Sensor
12
13
R/W
Zone 1 setpoint temperature 3,4
▪COOL
▪Water shift
-5..5ºC (ºC/x10ºC) // -41..41ºF
▪Water
5..20ºC (ºC/x10ºC) // 41..68ºF
▪Room
18..35ºC (ºC/x10ºC) // 64.4..95ºF
▪HEAT
▪Water shift
-5..5ºC (ºC/x10ºC) // -41..41ºF
▪Water
20..55/65ºC (ºC/x10ºC) // 68..131/149ºF
▪Room
10..30ºC (ºC/x10ºC) // 50..86ºF
▪Pool
15..35ºC (ºC/x10ºC) // 59..95ºF
13
14
R/W
Zone 2 setpoint temperature 1,2,3,4
▪COOL
▪Water shift
-5..5ºC (ºC/x10ºC) // -41..41ºF
▪Water
5..20ºC (ºC/x10ºC) // 41..68ºF
▪Room
18..35ºC (ºC/x10ºC) // 64.4..95ºF
▪HEAT
▪Water shift
-5..5ºC (ºC/x10ºC) // -41..41ºF
▪Water
20..55/65ºC (ºC/x10ºC) // 68..131/149ºF
▪Room
10..30ºC (ºC/x10ºC) // 50..86ºF
▪Pool
15..35ºC (ºC/x10ºC) // 59..95ºF
3
More information about zone 1 and zone 2 on Section 4.2.9
4
See Section 4.2.8 to understand the options available

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Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
14
15
R
Zone 1 current temperature 1,2,3,4
Water outlet/room/pool
▪-127..127ºC (ºC/x10ºC)
▪-260.6..260.6ºF
15
16
R
Zone 2 current temperature 1,2,3,4
Water outlet/room/pool
▪-127..127ºC (ºC/x10ºC)
▪-260.6..260.6ºF
16
17
R
Zone 1 temperature setting mode 3,4
▪1: Room temperature
▪2: Compensation curve (Water Temp)
▪3: Direct (Water Temp)
▪4: Pool Temp
17
18
R
Zone 2 temperature setting mode 3,4
▪1: Room temperature
▪2: Compensation curve (Water Temp)
▪3: Direct (Water Temp)
▪4: Pool Temp
18
19
R
Zone 1 min Setpoint temperature 1,3
▪Any (ºC/x10ºC)
19
20
R
Zone 1 max Setpoint temperature 1,3
▪Any (ºC/x10ºC)
20
21
R
Zone 2 min Setpoint temperature 1,3
▪Any (ºC/x10ºC)
21
22
R
Zone 2 max Setpoint temperature 1,3
▪Any (ºC/x10ºC)
4.2.3 Tank Configuration
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
30
31
R/W
Tank On/Off 4
▪0: Off
▪1: On
32
33
R
Tank current water temperature 1,2
▪-127..127ºC (ºC/x10ºC)
▪-260.6..260.6ºF
33
34
R/W
Tank water setpoint temperature 1,2
▪40..66/75ºC (ºC/x10ºC)
▪104..150.8/167ºF
34
35
R
Tank heater 4
▪1: Internal
▪2: External
35
36
R
Tank min water setpoint temperature 1,2,4
▪Any (ºC/x10ºC/Fº)
36
37
R
Tank max water setpoint temperature 1,2,4
▪Any (ºC/x10ºC/Fº)

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4.2.4 Consumption
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
45
46
R
Tank mode energy consumption 4
▪0..50.800 W
46
47
R
Heat mode energy consumption
▪0..50.800 W
47
48
R
Cool mode energy consumption
▪0..50.800 W
4.2.5 Maintenance
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
52
53
R
Error Code 5
▪0: No Error
▪0xxx: U+err
▪1xxx: H+err
▪2xxx: F+err
64
65
R
Device Status
▪1: Off
▪2: On
70
71
R
Current error status
▪0: No error
▪1: Error
4.2.6 Unit Configuration
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
81
82
R
Tank connection 4
▪0: No
▪1: Yes
82
83
R
Number of zones 3
▪1: 1 zone
▪2: 2 zones
83
84
R
Zone 1 setup 3,4
▪1: Room
▪2: Pool
84
85
R
Zone 2 setup 3,4
▪1: Room
▪2: Pool
85
86
R
Direction
▪1: Room
▪2: Tank
86
87
R
Outdoor type
▪1: STD
▪2: TCAP
▪3: HWT
5
See section 7 for possible error codes and their explanation

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4.2.7 Device registers
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
49
50
R
Device ID: 0x0D00
50
51
R
Software version
4.2.8 Considerations on Temperature Registers
Setpoint temperature may be controlled from 4 different internal parameters of the Hydro Unit:
Water shift, Water, Room and Pool.
All these parameters depend on the configuration of the Zone setup, Zone temp. setting mode
and Operation Mode.
Find below the correspondence of this configuration to know which internal parameter is
modified when we are controlling registers 12 and 13 (Modbus Protocol Address), corresponding
to Zone 1 setpoint temperature and Zone 2 setpoint temperature respectively.
Notice that temperature’s values temperature registers are expressed according to the
temperature´s format configured through its onboard DIP-Switches (See “4.3 - 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).
4.2.9 Zones
Zone x setup
Zone1 (Prot Add 83)
Zone2 (Prot Add 84)
Zone x temp. set. mode
Zone1 (Prot Add 16)
Zone2 (Prot Add 17)
Operation
Mode
(Prot Addr 4)
Zone x set. temp.
Zone1 (Prot Add 12)
Zone2 (Prot Add 13)
Zone x current temp
Zone 1 (Prot Add 14)
Zone 2 (Prot Add 15)
1: Room
1: Room temperature
1: Heat
2: Heat Tank
3: Tank
4: Cool Tank
5: Cool
Room
Room
2: Compensation Curve
Water Shift
Water
3: Direct
Water
2: Pool
4: Pool Temp
1: Heat
2: Heat Tank
Pool
Pool

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Aquarea H Generation includes the possibility to control up to 2 different zones. The register 82
(Modbus protocol address) indicates the number of zones configured in the Hydro unit: 1 or 2
zones.
Taking this information into account and only in case that Hydro unit is controlling 2 zones, the
register address 9 (Modbus protocol address) can be used to switch on/off the zones. Notice
that if the Hydro unit is configured to manage a single zone, the use of the register address 9
(Modbus protocol address) doesn’t have any effect.
Please, check the Hydro Unit User’s Manual for more information about the zones’ configuration
and their options.
4.3 DIP-switch Configuration Interface
All the configuration values on INMBSPAN001A000 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:
The following tables apply to the interface´s configuration through DIP-switches:
SW1–Hydro unit’s features
SW1-P1..4
Description
Set point limits are defined by the configuration of Aquarea H Generation Unit (Default value).
Set point limits are the maximum ones allowed by the manufacturer, not considering the specific
Aquarea H Generation Unit’s limits
Reserved, not used (Default value)
Reserved, not used
SW3
SW4
FIXING
CABLE
EIA485
A B
Hydro Unit
SW1
SW1
SW4
ON
1 2 3 4
ON
SW3
1 2 3 4
1 2 3 4 5 6 7 8
ON
ON
ON
ON
ON

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Reserved, not used (Default value)
Reserved, not used
Reserved, not used (Default value)
Reserved, not used
Table 4.1 SW1: Hydro unit’s features
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.
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON

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

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SW3 –Modbus Slave address
Table 4.4 SW3: Modbus slave address
Add
SW3-P1..6
Add
SW3-P1..6
Add
SW3-P1..6
Add
SW3-P1..6
Add
SW3-P1..6
0
13
26
39
52
1
14
27
40
53
2
15
28
41
54
3
16
29
42
55
4
17
30
43
56
5
18
31
44
57
6
19
32
45
58
7
20
33
46
59
8
21
34
47
60
9
22
35
48
61
10
23
36
49
62
11
24
37
50
63
12
25
38
51
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON

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4.4 Implemented Functions
INMBSPAN001A000 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)
4.5 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 (yellow LED)
Device status
LED indication
ON / OFF Period
Description
During not normal
operation
LED blinking
500ms ON / 500ms OFF
Communication error
During normal
operation
LED flashing
100ms ON / 1900ms OFF
Normal operation (configured and
working properly)
L1 (green LED) & L2 (red LED)
Device status
LED indication
ON / OFF Period
Description
During normal
operation
LED Pulse
5sec ON / --- OFF
Device Start-up
During not normal
operation
LED alternatively
blinking
500ms ON / 500ms OFF
EEPROM failure

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4.6 EIA-485 bus. Termination resistors and Fail-Safe Biasing
mechanism
EIA-485 bus requires a 120Ω terminator resistor at each end of the bus to avoid signal
reflections.
In order to prevent fail status detected by the receivers, which are “listening”the bus, when all
the transmitters’outputs are in three-state (high impedance), it is also required a fail-safe
biasing mechanism. 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 INMBSPAN001A000 device includes an on-board terminator resistor of 120Ω 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 120Ω 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).

IntesisTM INMBSPAN001A000
User’s Manual r1.3 EN
© HMS Industrial Networks S.L.U. - All rights reserved
This information is subject to change without notice
URL https://www.intesis.com
19 / 22
5. Electrical and Mechanical features
Enclosure
Plastic, type PC (UL 94 V-0)
Net dimensions (dxwxh):
93 x 53 x 58 mm / 3.7” x 2.1” x 2.3”
Color: Light Grey. RAL 7035
Operation
Temperature
0ºC to +60ºC
Weight
85 g.
Stock
Temperature
-20ºC to +85ºC
Mounting
Wall
DIN rail EN60715 TH35.
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
Stock Humidity
<95% RH, non-condensing
Modbus RTU
port
1 x Serial EIA485 Plug-in screw terminal
block (2 poles):
A, B
Compatible with Modbus RTU EIA-485
networks
Isolation voltage
1500 VDC
Hydro unit port
1 x Specific connector
Specific cable included
Isolation
resistance
1000 MΩ
Switch 1
(SW1)
1 x DIP-Switch for Hydro Unit features
Protection
IP20 (IEC60529)
Switch 3
(SW3)
1 x DIP-Switch for Modbus RTU settings
LED indicators
1 x Onboard LED - Operational
status
Switch 4
(SW4)
1 x DIP-Switch for extra functions
EIA-485
Port
Hydro Unit
connection
DIP
Switch SW3
DIP
Switch SW1
LED
Indicator
DIP
Switch SW4

IntesisTM INMBSPAN001A000
User’s Manual r1.3 EN
© HMS Industrial Networks S.L.U. - All rights reserved
This information is subject to change without notice
URL https://www.intesis.com
20 / 22
6. List of supported Hydro Unit Types.
A list of Panasonic Hydro unit model’s references compatible with INMBSPAN001A000 and their
available features can be found in:
https://www.intesis.com/docs/compatibilities/inxxxpan001a000_compatibility