Helmholz PN/ModbusTCP Coupler User manual

Quick Start Guide PN/ModbusTCP Coupler
Version
2en
as of FW 1.00
www.helmholz.com

Quick Start Guide PN/ModbusTCP Coupler2
Contents
1. Safety instructions 3
2. Introduction 4
3. Function of the PN/ModbusTCP Coupler 4
4. Connection 5
5. Install GSDML le 5
6. Concept of data exchange 6
7. Supported ModbusTCP function codes 8
8. Conguration in the TIA portal 9
9. Parameters of the PN/ModbusTCP Coupler 10
10. Assign a PROFINET device name to the PN/ModbusTCP Coupler 11
11. Web interface of the PN/ModbusTCP Coupler 12
12. MQTT Publisher 14
13. Firmware update & reset to factory settings 16
14. PN/ModbusTCP status and control via the PLC 17
15. LED status information 18
16. Technical data 19
BT-beipack-134

Quick Start Guide PN/ModbusTCP Coupler 3
1. Safety instructions
Target audience
This description is only intended for trained personnel qualied in control and auto-
mation engineering who are familiar with the applicable national standards.
For installation, commissioning, and operation of the components, compliance with the
instructions and explanations in this operating manual is essential. The specialist person-
nel is to ensure that the application or the use of the products described fullls all safety
requirements, including all applicable laws, regulations, provisions, and standards.
Intended use
The device has a protection rating of IP 20 (open type) and must be installed in an elec-
trical operating room or a control box/cabinet in order to protect it against environmen-
tal inuences. To prevent unauthorized operation, the doors of control boxes/cabinets
must be closed and possibly locked during operation.
The consequences of improper use may include personal injury to the user or third par-
ties, as well as property damage to the control system, the product, or the environment.
Use the device only as intended!
Operation
Successful and safe operation of the device requires proper transport, storage, setup,
assembly, installation, commissioning, operation, and maintenance.
Operate the device only in awless condition. The permissible operating conditions and
performance limits (technical data) must be adhered to.
Retrots, changes, or modications to the device are strictly forbidden.

Quick Start Guide PN/ModbusTCP Coupler4
Application example: 1
Machine 1 Machine 2
TCP
Server
2. Introduction
This document explains the initial commissioning of the PN/ModbusTCP Coupler.
You can nd the most current version of the documentation under www.helmholz.
de or scan the QR code directly.
3. Function of the PN/ModbusTCP Coupler
Simple and uncomplicated connection of a PROFINET network with a ModbusTCP
network is possible with the PN/ModbusTCP Coupler.
The PN/ModbusTCP Coupler enables data transmission between a
PROFINET controller and ModbusTCP participants.
Received input data on one of the network sides is made available as output data to
the other network side. The IO data transfer takes place live and as quickly as pos-
sible without additional handling blocks.
The maximum size of the transmitted data is 1024bytes of input/output data. Up to
300slots for IO modules are available.
The integration into the PLC engineering tool is made possible by a GSDML le;
special conguration software isn’t necessary.
In addition to the PROFINET / ModbusTCP communication, the PN/ModbusTCP
Coupler also makes an MQTT Publisher available on both network sides.
In this way, the values exchanged via the gateway can also be distributed via MQTT
to visualization or operating data recording systems.
SCAN
QR CODE
TO GET
MANUAL
PN/ModbusTCP Coupler
documentation

Quick Start Guide PN/ModbusTCP Coupler 5
4. Connection
The left RJ45 sockets “X1 P1” and “X1 P2” are for the connection of the PROFINET
network; the right RJ45 sockets “X2 P1” and “X2 P2” are for the connection of the
ModbusTCP network.
The PN/ModbusTCP Coupler must be supplied with 24 V DC at the wide range input
18 ... 30 V via the provided connector. The power supply is designed redundantly. At
least a supply path PS 1 or PS 2 must be connected.
5. Install GSDML le
Please download t he GSDML le (“GSDML-V2.34-Helmholz-PN-ModbusTCP-cou-
pler-______.xml”) under www.helmholz.de or scan the QR code.
Install the le in the engineering tool so that the PN/ModbusTCP Coupler is available
for conguration.
Note: The housing of the PN/ModbusTCP Coupler is not grounded. Please connect the
functional grounding connection (FG) of the PN/ModbusTCP coupler correctly with the
reference potential.
Port 1, port 2
PROFINET connection
Operation LEDs (see page 10)
X2 P1, P2
ModbusTCP network
Redundant power supply
PS 1/PS 2
MAC address of the
PROFINET connection
MAC address
ModbusTCP network
PN/ModbusTCP Coupler
GSDML le
SCAN
QR CODE
TO GET
GSDML

Quick Start Guide PN/ModbusTCP Coupler6
TCP
ModbusTCP
Clients
Discrete Inputs: 65536 Bits
(8 Kbyte)
Discrete Input 0 – 65535
Coils: 65536 Bits
(8 Kbyte)
Coils 0 – 65535
Input Register:
65535 Words
(128 Kbyte)
Register 0 – 65535
Holding Register:
65535 Words
(128 Kbyte)
Register 0 – 65535
In the PN/ModbusTCP Coupler, all coils, inputs and registers are always present from
the perspective of the ModbusTCP communication. It is thus always possible to ac-
cess all data types from address 0-65535.
With the PROFINET conguration, that data can be assigned in the slots of the PN/
ModbusTCP Coupler to the PLC-IO image that is to be accessed in the PLC program.
Up to 300 slots are available for such assignments in the PN/ModbusTCP Coupler
ModbusTCP differentiates between 4 different data types:
1. Discrete Inputs: Input bits; written by the PROFINET PLC
2. Coils: Output bits or internal data bits; read by the PROFINET PLC,
but can also be written
3. Input Register: Input word; written by the PROFINET PLC
4. Holding Register: Output word or internal data word; read by the PROFINET PLC,
but can also be written
6. Concept of data exchange
The PN/ModbusTCP Coupler is a ModbusTCP server. It receives data via ModbusTCP, which is then transmitted to the IO image of the PROFINET PLC
(inputs in the PLC) and makes data available as transmission data, which it receives from the PROFINET PLC (outputs in the PLC).
All data types are enumerated from 0-65535. All data types have their own storage area in the PN/ModbusTCP Coupler.

Quick Start Guide PN/ModbusTCP Coupler 7
TCP
ModbusTCP
Clients
Discrete inputs: 65536 Bits
(8 Kbyte)
Discrete Input 0 – 65535
Coils: 65536 Bits
(8 Kbyte)
Coils 0 – 65535
Input Register:
65536 Words
(128 Kbyte)
Register 0 – 65535
Holding Register:
65536 Words
(128 Kbyte)
Register 0 – 65535
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
...
• Discrete Input 1 Byte
• Address 10...17 (8 Bits)
• PLC: 1 Output Byte (QB 100)
• Read Coils, 2 Bytes
• Address 100..115
• PLC: 2 Input Bytes (ID 110)
• Write Coils, 4 Bytes
• Address 20..51
• PLC: 4 Output Bytes (QD 110)
• Write Input register (16 Bit)
• Address 10
• PLC: 1 Output word (1 QW)
• Read Holding register (16 Bit)
• Address 80
• PLC: 1 Input word (1 IW)
• Write Holding register (16 Bit)
• Address 60
• PLC: 1 Output word (1 QW)
The following modules are available for access to the ModbusTCP storage:
Discrete Inputs (only writing):
• Write Discrete Inputs 1 Byte (8 bits)
• Write Discrete Inputs 2 Byte (16 bits)
• Write Discrete Inputs 4 Byte (32 bits)
• Write Discrete Inputs 8 Byte (64 bits)
• Write Discrete Inputs 16 Byte (128 bits)
• Write Discrete Inputs 32 Byte (256 bits)
Coils (read/write):
• Write Coils 1 Byte (8 bits)
• Write Coils 2 Byte (16 bits)
• Write Coils 4 Byte (32 bits)
• Write Coils 8 Byte (64 bits)
• Write Coils 16 Byte (128 bits)
• Read Coils 1 Byte (8 bits)
• Read Coils 2 Byte (16 bits)
• Read Coils 4 Byte (32 bits)
• Read Coils 8 Byte (64 bits)
• Read Coils 16 Byte (128 bits)
Input Register (only writing):
• Write Input Register (16 bits)
Holding Registers (read/write):
• Write Holding Register (16 bits)
• Read Input Register (16 bits)
All modules have the register numbers (Input Register, Holding Register)
or the rst bit address (Discrete Inputs, Coils) as parameter.
Example of a conguration:

Quick Start Guide PN/ModbusTCP Coupler8
7. Supported ModbusTCP function codes
The PN/ModbusTCP Coupler supports the following function codes:
Data size Data range Function Function code
decimal
Function code
hex
Bit access
Input bits Read discrete inputs 2 0x02
Output bits or
internal bits
Read coils 1 0x01
Write single coil 5 0x05
Write multiple coils 15 0x0F
16 bit
access
Input data Read input register 4 0x04
Output data or
internal information
Read holding register 3 0x03
Write single holding register 6 0x06
Write multiple Register 16 0x10
Read/write multiple holding registers 23 0x17
Mask write holding register 22 0x16

Quick Start Guide PN/ModbusTCP Coupler 9
8. Conguration in the TIA portal
The PN/ModbusTCP Coupler can be found in the hardware catalog under “Other eld
devices / PROFINET IO / Gateway / Helmholz GmbH & Co. KG / Helmholz PN/Mod-
busTCP Coupler”.
The PN/ModbusTCP Coupler can be completely congured via the GSDML le in the
PROFINET congurator. An additional conguration software is not necessary. The
ModbusTCP network settings can also be made through the website if needed.
Provide the PN/ModbusTCP Coupler with a PROFINET name under “General”. Con-
nect the PROFINET network of the PROFINET controller with the PN/ModbusTCP
Coupler.
Now insert the desired modules for discrete inputs, coils, input registers or holding
registers into the slots.
All modules have the register number (input register, holding register) or the
rst bit address (discrete inputs, coils) as parameter. In the case of the input bits and
coils, these can be addressed together in one slot from 8 bits (1 Byte) to 256 bits (32
Bytes). Addressing of individual bits is not possible via the PROFINET PLC; the smallest
unit is one byte.

Quick Start Guide PN/ModbusTCP Coupler10
ModbusTCP Denition of the IP address for the ModbusTCP network.
IP address mode:
“DHCP”, “Static IP”, “use IP from webpage setting”
Static IP address:
The static IP address can be indicated here when the address
mode has been set to “Static IP”.
Static IP subnet mask:
The subnet mask can be indicated here when the address
mode has been set to “Static IP”.
DHCP host name mode:
Adopt from the PROFINET conguration or from the web page
DHCP host name:
DHCP name of the device
ModbusTCP port:
Port to which the ModbusTCP driver listens. Port 502
is always active, even when another port has been set here.
ModbusTCP connection Time in which a connection is closed when
monitoring (ms): communication no longer takes place via this connection.
Range: 1–65535 ms
Maximum number of
Number of participants that can establish connections
ModbusTCP connections: with the PN/ModbusTCP coupler simultaneously.
Register for PROFINET status: Number of the register from which the status of the
PN/ModbusTCP coupler can be read out via ModbusTCP.
Range 0-65535
Status of website: On which network interfaces should the website be
displayed.
MQTT Publisher option:
On which network interfaces should the MQTT Publisher
be activated.
9. Parameters of the PN/ModbusTCP Coupler
The conguration of the PN/ModbusTCP Coupler can take place completely through the PROFINET hardware congurator. However, several parameters can also be optionally
set via the website, e.g. the IP address of the ModbusTCP server, the DHCP host name.

Quick Start Guide PN/ModbusTCP Coupler 11
10. Assign a PROFINET device name to the PN/ModbusTCP Coupler
When the conguration of the PN/ModbusTCP Coupler has been completed in the
hardware congurator of the engineering tool, it can be loaded into the PLC.
In order that the PN/ModbusTCP Coupler can be found by the PROFINET controller,
the PROFINET device name must be assigned to the PN/ModbusTCP Coupler. To this
purpose, use the function “Assign device name”, which you can access in the Online
menu with the right mouse button when the PN/ModbusTCP Coupler is activated.
With the “Update list...” button, the network can be browsed for PROFINET par-
ticipants. The PROFINET device name can be assigned to the device with “Assign
name”.
The clear identication of the PN/ModbusTCP Coupler is ensured here by the MAC
address of the device. The MAC addresses of the device can be found on the device
front of the PN/ModbusTCP Coupler.
The Helmholz IPSet tool, which can be downloaded at no charge from the Helmholz
website, can also be used to set the PROFINET name.
If the PN/ModbusTCP Coupler has been assigned the correct PROFINET name, it is
recognized by the PLC and congured. If conguration has taken place correctly, the
PROFINET “BF” LED should be off.
Alternatively, the PROFINET name or the IP address of the device can be set with the
free Helmholz tool “IPset”.
The tool can be downloaded in the download area of the product under “Software”.
PN/ModbusTCP Coupler
IPSet
SCAN
QR CODE
TO GET
FIRMWARE

Quick Start Guide PN/ModbusTCP Coupler12
11. Web interface of the PN/ModbusTCP Coupler
The web interface of the PN/ModbusTCP coupler provides an overview of the status
and the conguration of the device, as well as the possibility for carrying out a rm-
ware update.
The ModbusTCP conguration can also be set in the web interface if this hasn’t been
prescribed through the PROFINET conguration.
A password must be dened for the standard user “admin” with the rst access to
the web interface. The password can be retroactively changed in the “Account”
menu.
The current settings and the status are represented in the “Overview”.
The other websites can be called up in the top line.
Note: Calling up the website can inuence the transmission capacity of the PN/
ModbusTCP Coupler.

Quick Start Guide PN/ModbusTCP Coupler 13
The “Module cong” page shows the IO modules dened by the PROFINET congu-
ration. The data type and the address are also provided on the ModbusTCP page.
The current value is displayed in brackets.
The IP address and the DNS name of the ModbusTCP network interface are set on
the “ModbusTCP server settings” website when these have not been xed through
the GSDML conguration.

Quick Start Guide PN/ModbusTCP Coupler14
12. MQTT Publisher
In addition to the PROFINET / ModbusTCP communication, the PN/ModbusTCP
Coupler also makes an MQTT Publisher available.
MQTT is broadly distributed and simple protocol for the distribution of information
in large networks.
The MQTT Publisher can be activated via the PROFINET conguration on the PROFINET
or Modbus interface.
For all IO modules dened in the PROFINET conguration, the current values of the
value change are sent via MQTT.
Since MQTT works slower than the priority PROFINET/Modbus TCP communication,
it is possible that not all value changes are transmitted via MQTT, but only the last
value state.
11.1 MQTT Publisher settings
At least one MQTT broker is always required to be able to distribute data via MQTT in
a network. The broker can run everywhere in the network.
The settings of the MQTT Publisher can be dened on the website under “MQTT”,
separate for the two network sides.
ClientID: The name of the MQTT Publisher
User name / Password: Optional user name and password for login with the
MQTT broker
Broker IP address: Address of the MQTT broker
Broker TCP port: MQTT port at the MQTT broker
Keep alive (seconds): MQTT connection monitoring in the event of inactivity
Note: The MQTT Publisher of the PN/ModbusTCP Coupler currently does not provide
encoding!

Quick Start Guide PN/ModbusTCP Coupler 15
PROFINET network: ModbusTCP network:
Module MQTT Topic Name MQTT Topic Name
Write discrete inputs PN-ClientID/Slot X/Output, Y bytes (1 to 32 bytes) ModbusTCP-ClientID/Discrete Inputs/Address X, Y Bytes (1 to 32 bytes)
Read Coils PN-ClientID/Slot X/Input, Y bytes (1 to 16 bytes) ModbusTCP-ClientID/Coils /Address X, Y Bytes (1 to 16 bytes)
Write Coils PN-ClientID/Slot X/Input, Y bytes (1 to 16 bytes) ModbusTCP-ClientID/Coils /Address X, Y bytes (1 to 16 single bytes)
Read holding register PN-ClientID/Slot X/Output (2 byte decimal value) ModbusTCP-ClientID/Holding Register/Register X (2 byte decimal value)
Write holding register PN-ClientID/Slot X/Output (2 byte decimal value) ModbusTCP-ClientID/Holding Register/Register X (2 byte decimal value)
Write input register PN-ClientID/Slot X/Output (2 byte decimal value) ModbusTCP-ClientID/Input Register/Register X (2 byte decimal value)
Example PN_MQTT/Slot 1/Input, 3 bytes | 0x12 0x23 MODBUS_MQTT/Coils/Address 49, 2 bytes | 0x12 0x34
PN_MQTT/Slot 5/Output | 12345 MODBUS_MQTT/Holding Register/Register 10 | 12345
11.2 MQTT format of the data
The data is transmitted in plain text format via MQTT. The syntax differs depending upon the network interface used.
The following MQTT topics can also be read on both network interfaces:
ClientID/Modules List:
Contains the list of all topics made available by the PN/ModbusTCP Coupler via the addressed interface.
ClientID/Status Register:
Contains the value of both status bytes, see chapter 11.1.

Quick Start Guide PN/ModbusTCP Coupler16
13. Firmware update & reset to factory settings
A rmware update can be carried out via the web interface on the “Firmware up-
grade” page.
The rmware can be selected with the Browse button. The rmware le has the end-
ing “HUF” (Helmholz Update File).
The rmware is transferred to the PN/ModbusTCP Coupler and burned with the
“Submit” button.
The PN/ModbusTCP Coupler then performs a restart and the new rmware is active.
Please download the current rmware under www.helmholz.de or scan the QR
code.
Note: It is also possible to carry out the reset to factory settings at the website.
PN/ModbusTCP Coupler
rmware
SCAN
QR CODE
TO GET
FIRMWARE

Quick Start Guide PN/ModbusTCP Coupler 17
14. PN/ModbusTCP status and control via the PLC
13.1 Status
The PN/ModbusTCP Coupler provides a status via the PROFINET input image:
Byte 1: Status bits
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
PROFINET congu-
ration completed.
Device is ready to
operate.
- Power supply
detected on PS 1
(left)
Power supply
detected on PS 2
(right)
MQTT connection
active on network
X1
MQTT connection
active on network
X2
ModbusTCP net-
work has an active
IP address
(static or acquired
via DHCP)
Network cable
detected
11.2 Control bits
The PN/ModbusTCP Coupler can be controlled via the following control bits in the PROFINET output image:
Byte 1 “Control bits”
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
- - - - - - Reset the ModbusTCP
memory (coils, inputs and
registers)
Interrupt all ModbusTCP connec-
tions and prevent the establishing
of connections
Byte 2: Number of active connections

Quick Start Guide PN/ModbusTCP Coupler18
15. LED status information
X1 PROFINET (left side) X2 ModbusTCP (right side)
SF (rot)
Off Conguration correct Conguration correct
On There is no conguration, the conguration does not agree with
the conguration on the right side (X2), or a diagnosis exists.
PROFINET side not congured or has failed
Flashing PROFINET function “LED ashing” for nding the device is being
carried out
BF (red)
Off The device is congured The device is congured
On The device has no conguration, the PROFINET device name is
incorrect, or there is no connection with the PROFINET controller.
No Ethernet cable plugged in or no Ethernet connection
Flashing PROFINET function “LED ashing” for nding the device is being
carried out
MT (yellow)
Flashing A rmware update is being carried out A rmware update is being carried out.
Blinking together
with SF and BF.
PROFINET function “LED ashing” for nding the device is being
carried out.
PWR (green)
On PS1 Power supply present PS2 Power supply present
RUN (green)
Off Firmware or device defective. Please contact Support
On The device is ready to operate
RJ45 LEDs X1 P1/P2 and X2 P1/P2
Green (Link) Connected
Orange (Act) Data transfer at the port running

Quick Start Guide PN/ModbusTCP Coupler 19
16. Technical data
Order no. 700-159-3MB01
Article designation PN/ModbusTCP Coupler
Scope of delivery PN/ModbusTCP Coupler incl. Quick Start Guide
PROFINET interface
-Number 1 with 2 ports
-Protocol PROFINET IO as dened in IEC 61158-6-10
-Transmission rate 100 Mbps full duplex
-I/O image size max. 1024 bytes of input and output data
-Number of congurable slots 300
-Connection 2x RJ45, integrated switch
-Features Media redundancy (MRP), automatic addressing, topology detection (LLDP, DCP), diagnosis alarms
ModbusTCP interface
-Number 1 with 2 ports
-Protocol ModbusTCP server
-Transmission rate 10/100 Mbps full duplex
-Storage size 65536 coil bits, 65536 discrete input bits, 65536 input register, 65536 holding register
-Supported function codes 1, 2, 3, 4, 5, 6, 15, 16, 22, 23
-Connection 2x RJ45, integrated switch
Status indicator 9 LEDs function status, 8 LEDs Ethernet status
Voltage supply 24 V DC (18 - 28 V DC)
Current draw Max. 210 mA
Power dissipation Max. 5 W
Dimensions (D x W x H) 35 mm x 58 mm x 72 mm
Weight Approx. 135 g
Ambient temperature 0 °C to 60 °C
Transport and storage temperature -20 °C to 80 °C
Protection rating IP 20
Certications CE

Helmholz GmbH & Co. KG | Hannberger Weg 2 | 91091 Großenseebach | Germany | Phone [phone] | Fax [phone] | [email protected] | www.helmholz.com
Note:
The contents of this Quick Start Guide have been checked by us so as to ensure that they match the hardware and software described.
However, we assume no liability for any existing differences, as these cannot be fully ruled out.
The information in this Quick Start Guide is, however, updated on a regular basis. When using your purchased products, please make sure to use the latest version of this
Quick Start Guide, which can be viewed and downloaded in the Internet at www.helmholz.de.
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