HWS Intesis INMBSOCP0010100 User manual

Modbus Server
Open Charge Point Protocol (OCPP)
USER MANUAL
Issue date: 03/2021 r1.4 ENGLISH

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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 OCPP Charging Points into
Modbus TCP or RTU enabled systems and external OCPP
Central Systems
ORDER CODES
LEGACY ORDER CODE
INMBSOCP0010100
-
INMBSOCP0200100
-

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INDEX
1Description ...............................................................................................................................................5
Introduction.......................................................................................................................................5
Functionality .....................................................................................................................................6
Gateway’s capacity ..........................................................................................................................6
2Modbus interface......................................................................................................................................7
Description........................................................................................................................................7
Functions supported.........................................................................................................................7
Modbus TCP.....................................................................................................................................7
Modbus RTU ....................................................................................................................................7
Address Map ....................................................................................................................................7
Points definition................................................................................................................................8
3Connections .............................................................................................................................................9
Powering the device.......................................................................................................................10
Connection to Modbus ...................................................................................................................10
3.2.1 Modbus TCP...........................................................................................................................10
3.2.2 Modbus RTU...........................................................................................................................10
Connection to the configuration tool...............................................................................................10
4Set-up process and troubleshooting ......................................................................................................11
Pre-requisites .................................................................................................................................11
Intesis MAPS. Configuration & monitoring tool for Intesis Modbus series.....................................11
4.2.1 Introduction.............................................................................................................................11
4.2.2 Connection..............................................................................................................................11
4.2.3 Configuration tab ....................................................................................................................12
4.2.4 Signals....................................................................................................................................14
4.2.5 Sending the configuration to Intesis .......................................................................................14
4.2.6 Diagnostic...............................................................................................................................15
Set-up procedure............................................................................................................................16
5Electrical & Mechanical Features...........................................................................................................17
6Dimensions ............................................................................................................................................18

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1 Description
Introduction
This document describes how to integrate OCPP devices (EV Chargers) into Modbus TCP and RTU compatible
devices and systems, or into an external OCPP Central System (CS), through Intesis Modbus - OCPP gateway. An
assumption is made that the user is familiar with Modbus and OCPP technologies and their technical terms.
When working as an OCPP Central System, the gateway enables OCPP signals and operations to be managed by
a Modbus controller acting as a closed OCPP system. Alternatively, the gateway can be configured to connect to an
External OCPP Central system, providing transparent OCPP communication between EV chargers and the external
OCPP CS while reading out valuable information for Modbus supervisory applications.
The gateway acts as a Modbus TCP Server or a Modbus RTU slave in its Modbus interface, allowing a Modbus
client/master device to read/write to its internal points. From OCPP standpoint, Intesis gateway parses data from
OCPP messages to their corresponding Modbus registers or directly transmits to an External OCPP system. In every
OCPP installation, one and only one Central System must be present. Options are:
•Central System implemented in a Modbus enabled control system
•External OCPP Central System, and Modbus supervisory applications.
Fig 1.1 Use case 1: Integration of OCPP EV Charging points into a Modbus BMS (TCP or RTU)
Fig 1.2 Use case 2: Modbus gateway acting as an bridge between an external OCPP Central System and
OCPP chargers

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Functionality
The configuration tool for this gateway is Intesis® MAPS software. For a detailed information about the necessary
steps to integrate the gateway in a Modbus BMS, please review the Intesis Configuration Guide for more information.
Available in www.intesis.com
From the OCPP system standpoint, after the start up process, all EV Chargers will try to connect with Intesis gateway
(Intesis gateway must be configured as a Central System in the EV Chargers configuration). Only if the gateway has
EV Chargers configured will accept the connections. Then EV Chargers will notify any event or update to the gateway.
When working as a Central System, after the start up process, the gateway presents its points as Modbus Registers,
to be read or written by a Modbus client/master device using standard Modbus functions. The values received from
Modbus are immediately written in an OCPP message and sent to the EV Charger.
When working with an External Central System, the gateway must be configured to connect to the IP of the External
Central system to, after the start up process, enable transparent OCPP communication between the EV chargers
and the Central System. At the same time, the gateway presents its points as Modbus Registers, to be read by a
Modbus client/master device using standard Modbus functions.
Gateway’s capacity
Intesis gateway capacity is detailed below:
Element
Capacity
Notes
Number of OCPP
devices
Model INMBSOCP0010100: 1 device
Maximum number of different
OCPP devices/chargers the
Intesis gateway can
communicate to
Model INMBSOCP0200100: Up to 20 devices
Connectors per
device supported
7
Maximum number of connectors
integrable from an OCPP device
OCPP protocol
version supported
OCPP 1.6
JSON version implemented
Modbus link layers
supported
Modbus RTU (EIA485)
Modbus TCP
Those supporting Modbus
protocol. Communication over
TCP/IP and RTU
Number of Modbus
Master devices
Up to 6 TCP connections
Number of Modbus Client
devices supported by the device

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2 Modbus interface
Description
Intesis acts as a server device in its Modbus TCP or RTU interface, connecting to the Ethernet port of the gateway
or the RS485 port. To access the points and resources of the Intesis from a Modbus client/master device, see details
below in this document.
Functions supported
Modbus functions 01 and 02 (coils and digital input registers) can be used to read Modbus registers.
Modbus functions 03 and 04 (read holding registers and read input registers) can be used to read Modbus registers.
Modbus functions 05 and 15 (Single digital Holding Registers and Write Multiple Holding Registers) can be used to
write Modbus registers.
Modbus functions 06 and 16 (Single Multiple Holding Registers and Write Multiple Holding Registers) can be used
to write Modbus registers.
If poll records are used to read or write more than one register, it is necessary that the range of addresses requested
contains valid addresses; if not the corresponding Modbus error code will be returned.
All the registers are of 2 bytes, even if they are associated to signals of type bit in the external system, and its content
is expressed in MSB..LSB.
Modbus error codes are fully supported; they will be sent whenever a non-valid Modbus action or address is required.
Modbus TCP
The TCP port to use can be configured (by default 502 is used).
The IP address, subnet mask and default router address to use by Intesis gateway can be also configured.
Modbus RTU
Connect the communication cable coming from the Modbus network to the port marked as Modbus of Intesis.
Connect the EIA485 bus to connectors A3 (B+), A2 (A-) and A1 (SGND). 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.
Address Map
The Modbus address map is predefined and it’s not configurable. Check the Configuration Guide to find a list with all
the available registers implemented in the gateway.

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Points definition
Every point defined in the gateway has the Modbus Format, Point and R/W features associated to it.
Each point defined in Intesis has the following Modbus features associated to it:
Feature
Description
#Bits
One of the following bit lengths can be used:
•1 bit
•16 bits
•32 bits
Data Coding
Format
One of the following Modbus data coding formats can be used:
•16/32 unsigned.
•16/32 bits signed (one’s complement – C1).
•16/32 bits signed (two’s complement –C2).
•16/32 bits Float.
•16/ bits Bitfields.
•Error comm
Function code
One of the following Modbus function codes can be used:
•1- Read Coils.
•2- Read Discrete Inputs.
•3- Read Holding Registers.
•4- Read Input Registers.
•5- Write Single Coil.
•6- Write Single Register.
•15- Write Multiple Coils.
•16- Write Multiple Registers.
Byte Order
•Big Endian
•Little Endian
•Word Inverted Big Endian
•Word Inverted Little Endian
Register Address
The Modbus register address inside the slave device for the point.
Bit inside the
register
Bit inside the Modbus register (optional). The gateway allows bit decoding from
generic 16 bits input/holding Modbus registers.
Bit coding into 16 bits input/holding Modbus registers is used for some devices to
encode digital values into this type of registers, being these registers normally
accessible using Modbus function codes 3 and 4 (read holding/input registers).
Read/Write
0: Read
1: Write
2: Read / Write

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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. 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.
Ethernet / Modbus TCP / OCPP
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). With factory settings, after powering up the
gateway, DHCP will be enabled for 30 seconds. After that time, if no IP is
provided by a DHCP server, the default IP 192.168.100.246 will be set
Port Modbus RTU
Connect the EIA485 bus to connectors A3 (B+), A2 (A-) and A1 (SNGD) of
Intesis gateway’s Port. Respect the polarity.
Note for EIA485 port; 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
ΩNot used.
Fig 3.1 Connections
Ensure proper clearance for cables (see section 6).
Terminal Wiring
(for power supply and
low-voltage signals)
Per 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
Power
1 x Plug-in screw terminal block (3 poles)
Positive, Negative, Earth
9-36 VDC / 24 VAC / 50-60 Hz / 0.140 A / 1.7 W
Ethernet
1 x Ethernet 10/100 Mbps RJ45
2 x Ethernet LED: port link and activity
Port
1 x Serial EIA485 (Plug-in screw terminal block 3 poles)
A1, A2, A3 (Reference ground or shield)
1500VDC isolation from other ports

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Powering the device
A power supply working with any of the voltage range allowed is needed (check section 5).
WARNING! 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.
Connection to Modbus
3.2.1 Modbus TCP
Connect the communication cable coming from the network HUB or switch to the ETH port of Intesis. The cable to
be used shall be a straight Ethernet UTP/FTP CAT5 cable.
3.2.2 Modbus RTU
Connect the communication cable coming from the Modbus network to the port marked as Modbus of Intesis.
Connect the EIA485 bus to connectors A3 (B+), A2 (A-) and A1 (SGND). Respect the polarity.
Observe standard EIA485 bus specifications: maximum distance of 1200 meters, maximum of 32 devices connected
to the bus, and in each end of the bus it must be a termination 120 Ω resistor.
Connection to the 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). One method to connect to the PC can be used:
•Ethernet: Using gateway´s Ethernet port.

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4 Set-up process and troubleshooting
Pre-requisites
It is necessary to have a Modbus TCP client or RTU master device operative and properly connected to the
corresponding Modbus port of Intesis and OCPP devices connected to its corresponding ports as well.
An External OCPP system is required in the system if the External OCPP Central System functionality is enabled.
Connectors, connection cables, PC to use the configuration tool and other auxiliary material, if needed, are not
supplied by HMS Industrial Networks S.L.U for this standard integration.
Items supplied by HMS Networks for this integration are:
•Intesis gateway.
•Link to download the configuration tool.
•Product documentation.
Intesis MAPS. Configuration & monitoring tool for Intesis Modbus series
4.2.1 Introduction
Intesis MAPS is a Windows®compatible software developed specifically to monitor and configure Intesis Modbus
series. In this document, only the specific case of Modbus OCPP gateway will be covered. The installation procedure
and main functions are explained in the Intesis MAPS User Manual. This document can be downloaded from Intesis
product website at https://www.intesis.com/
Please check the Intesis MAPS User manual and Configuration guide for specific information about the different
parameters and how to configure them.
4.2.2 Connection
To configure the Intesis connection parameters press on the Connection button in the menu bar.
Fig 4.1 MAPS connection settings

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4.2.3 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 TCP and RTU interface configuration) and
OCPP (OCPP configuration and devices parameters).
Fig 4.2 Configuration tab –General Configuration Fig 4.3 Configuration tab –Modbus Configuration
Fig 4.4 Configuration tab –OCPP Configuration

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The OCPP Configuration window allows for the following settings:
•OCPP type: select the OCPP mode for the gateway
oBMS Central System: Gateway and BMS act as an OCPP Central System
oExternal Central System: Gateway acts as a bridge between an external OCPP CS and OCPP
chargers
▪IP:The IP of the external OCPP CS
▪Port: The port of the external OCPP CS
▪Check connection. Press this button to stablish a test connection between the gateway and
the External Central System.
•OCPP Scan. Press this button to search for OCPP Chargers in your network. Scan function will generate a
list of all chargers that are trying to connect with the gateway. –Note that chargers must be configured first
to connect to the gateway before they can be discovered with the Scan tool. For more information, please
review the Intesis Configuration Guide.
Fig 4.5 Scan OCPP network functionality
•Chargers Configuration: A list of all available chargers with its corresponding Charger Id and number of
connectors. Activating each Charger will change the Signals available in Signals tab. Keep in mind the
different capacities for each gateway model.
oHeartbeat interval: Changes the Heartbeat interval time for OCPP messages
•TCP Configuration port: Sets the TCP port for the OCPP communication with the OCPP Chargers
•TCP Keep Alive: Sets the time of inactivity to send a Keep Alive message (0-disabled)

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4.2.4 Signals
All available OCPP signals, its corresponding Modbus register and other main parameters are listed in the signals
tab. More information on each parameter and how to configure it can be found in the Intesis MAPS user manual.
Figure 4.6 Intesis MAPS Signals tab
NOTE: Depending on the OCPP mode selected in Configuration, signals list and displayed properties will vary.
4.2.5 Sending the configuration to Intesis
When the configuration is finished, follow the next steps.
1.- Click on Save button to save the project to the project folder on your hard disk (more information in Intesis
MAPS User Manual).
2.- You will be prompted to generate the configuration file to be sent to the gateway.
a.- If Yes is selected, the file containing the configuration for the gateway will be generated and saved also
into the project folder.
b.- If NO is selected, remember that the binary file with the project needs to be generated before the Intesis
starts to work as expected.
3.- Press the Send File button to send the binary file to the Intesis device. The process of file transmission can
be monitored in the Intesis Communication Console window. Intesis will reboot automatically once the new
configuration is loaded.
Figure 4.7 Intesis MAPS Receive/Send tab
IMPORTANT! After any configuration change, send the configuration file to the Intesis using button Send File.

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4.2.6 Diagnostic
To help integrators in the commissioning tasks and troubleshooting, the Configuration Tool offers some specific tools
and viewers.
To start using the diagnostic tools, connection with the Gateway is required.
The Diagnostic section is composed by two main parts: Tools and Viewers.
•Tools
Use the tools section to check the current hardware status of the box, log communications into
compressed files to be sent to the support, change the Diagnostic panels’ view or send commands
to the gateway.
•Viewers
To check the current status, viewer for the Internal and External protocols signals are available. It is
also available a generic Console viewer for general information about communications and the
gateway status and finally a Signals Viewer to simulate the BMS behaviour or to check the current
values in the system.
Figure 4.8 Diagnostic
NOTE: Depending on the OCPP mode selected in Configuration, signals list and displayed properties will vary.
Refer to the Configuration Tool manual for more information.

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Set-up procedure
1. Install Intesis MAPS on your laptop, use the setup program supplied for this and follow the instructions given by
the Installation wizard.
2. Install Intesis in the desired installation site. Installation can be on DIN rail or on a stable not vibrating surface
(DIN rail mounted inside a metallic industrial cabinet connected to ground is recommended).
3. If using, Modbus RTU, connect the communication cable coming from the EIA485 port of the Modbus RTU
installation to the port marked as Port A of Intesis (More details in section 3).
4. Connect the communication cable coming from the Modbus TCP and/or OCPP installations to the port marked
as ETH of Intesis gateway (More details in section 3).
5. Power up Intesis. The supply voltage can be 9 to 24 Vdc. Take care of the polarity of the supply voltage applied.
WARNING! To avoid earth loops that can damage Intesis 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.
6. If you want to connect using IP, connect the Ethernet cable from the laptop PC to the port marked as ETH of
Intesis (More details in section 3).
7. Open Intesis MAPS and create a new project by selecting a copy of the one named INMBSOCPxxx0100.
8. Modify the configuration as desired, save it and download the configuration file to Intesis as explained in the
Intesis MAPS user manual.
9. Visit the Diagnostic section and check that there is communication activity, some TX frames and some other RX
frames. This means that the communication with the Modbus TCP Client device/s and OCPP devices is OK. In
case there is no communication activity between Intesis and the OCPP or Modbus devices, check that those are
operative: check the baud rate, the communication cable used to connect all devices and any other
communication parameter.

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5 Electrical & Mechanical Features
Enclosure
Plastic, type PC (UL 94 V-0)
Net dimensions (dxwxh): 93x53x58 mm
Recommended space for installation (dxwxh): 100x60x70mm
Color: Light Grey. RAL 7035
Mounting
Wall.
DIN rail EN60715 TH35.
Terminal Wiring
(for power supply and
low-voltage signals)
Per 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
Power
1 x Plug-in screw terminal block (3 poles)
Positive, Negative, Earth
9-36 VDC / 24 VAC / 50-60 Hz / 0.140 A / 1.7 W
Ethernet
1 x Ethernet 10/100 Mbps RJ45
2 x Ethernet LED: port link and activity
Port
1 x Serial EIA485 (Plug-in screw terminal block 3 poles)
A, B, SGND (Reference ground or shield)
1500VDC isolation from other ports
Operation
Temperature
0°C to +60°C
Operational
Humidity
5 to 95%, no condensation
Protection
IP20 (IEC60529)

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6 Dimensions
Recommended available space for its installation into a cabinet (wall or DIN rail mounting), with space enough for
external connections
70 mm (h)
60 mm (w)
100 mm (d)
58 mm (h)
53 mm (w)
93 mm (d)