Helmholz REX 100 WiFi User manual

Quick Start Guide REX 100 WAN|WiFi
www.helmholz.de
Version
4en as of FW 1.9.0

Quick Start Guide REX 100 WAN | WiFi
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Content
1. Introduction 3
2. Preparing the REX 100 unit 3
3. Access to the myREX24-V2 portal 5
4. Initial REX conguration via the myREX24-V2 portal 8
5. Router conguration transfer options 11
6. Establishing a VPN connection to your REX 100 14
7. Tips and tricks 15
8. Remote maintenance of Ethernet CPUs 18
9. Description of LEDs and buttons 19
10. Restoring the REX 100 router to its default settings 21
11. Load conguration/rmware update from USB stick 21
12. Technical data 22

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2. Preparing the REX 100 unit
2.1 REX 100 WiFi
Connect a WiFi-compatible antenna (2.4 GHz) and ensure that a radio connection to
a WiFi network is possible. Antennas are available separately as accessories.
The LAN ports are also active when the REX 100 router has no connection with the
Internet.
2.2 REX 100 WAN
Connect the WAN interface of the REX 100 (P1 WAN) with a patch cable with the
higher level (company) network/router. The LAN ports P2 to P4 are available for
connection to the machinery network.
1. Introduction
The REX 100 is an industrial router suitable for worldwide remote access to IPv4-en-
abled devices (PLCs, HMIs, IP cameras, etc.) It is mounted on the DIN rail. This Quick
Start Guide explains the basic conguration of the REX 100 router. The conguration
is created in the myREX24 V2 portal and then transferred to the REX 100.
Important advance information: Please use the latest version of the dial-up software
“shDIALUP” (as of version v3.7 R1.0). You can acquire it as a download at www.helm-
holz.de. For successful connection with the myREX24 V2 portal, REX 100 routers require
at least the rmware status V1.5.0 or newer.
P4 LANP1 WAN P2 LAN P3 LAN
Ext.V DC
18... 30 V
+ FE IN1IN2–
FCN
RST
PWR
RDY
CON
USR
SN:
R00012345
USB
P4 LANP1 LAN P2 LAN P3 LAN
Ext.V DC
18... 30 V
+FE IN1IN2–
FCN
RST
PWR
RDY
CON
USR
SN:
R00012345
ANT
USB
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
WLAN Accesspoint
Ethernet
Ethernet
Ethernet

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2.3 Power supply
The REX 100 must be supplied with 24 V DC at the wide range input 18 ... 30 V DC
via the provided connector.
Note: The housing of the REX100 is not grounded. Please correctly connect the functional
grounding connection (FG) of the REX 100 WAN (700-875-WAN01) and REX 100 WiFi
(700-875-WIF01) with the reference portal.
2.4 Digital inputs IN1 and IN2
The alarm inputs can be activated with potential-free switches, buttons or relay
contacts.
IN1 can, for example, be used for the VPN establishing of connection with the my-
REX24 portal. An alarm can be triggered with the IN2.
The use of both inputs for the alarm is also possible. The con guration of the alarms
takes place via alarm management in the myREX24 V2 portal.
2.5 Boot procedure
The green PWR LED lights up when the supply voltage is switched on.
The boot process starts following the internal system check (duration of approx. 25
sec.), which is indicated by the blinking RDY LED (for approx. 90 sec.).
The REX 100 is ready for operation as soon as the RDY LED lights solid.

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3. Access to the myREX24-V2 portal
The REX 100 can be fully congured using the myREX24 V2 portal.
A secure connection with the portal is required to this purpose:
-The remote client software shDIALUP allows you to undertake administration in the
myREX24 V2 portal and the VPN establishing of a connection with an REX router.
You can nd the software
(shDIALUP) in the download area under www.helmholz.de. There you can also
download further documents with additional example applications at any time.
-Alternatively, you can also create the conguration with an HTTPS-secured direct
call-up from your browser. The call-up is realized with the following URL: https://
v2.myREX24.net. However, remote maintenance via VPN tunnel cannot be set up
via the browser.
Always use your myREX24-V2 portal access data to log in.
3.1. Registration
If you don’t yet have a myREX24-V2 portal account, you can register under http://
www.myREX24.net.
Fill out the required elds there. After your data is checked by our service team
(Mon.-Fri. 8 a.m. to 5 p.m. CET), you will receive two separate e-mails with the
access data.
The rst e-mail contains the user name, the second the password.

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3.2 Logging in to the myREX24 V2 portal
Once you install and start the shDIALUP software, you can use your login data to log
in to the myREX24 V2 portal.
Select “V2.myREX24.net” in the server list.
Notes:
-Alternatively, the login page can also be reached under: https://v2.myrex24.net. Any
up-to-date browser can be used for this purpose. Chrome
and Firefox are recommended.
-Your login name is composed of a user name preceding the @ character and the name
of your company. Example: User@Account
-Please change your password after logging in for the rst time.
-If necessary, you can also create and administer additional users after logging into the
myREX24-V2 portal.
3.3 Navigation in the portal
Once a user has logged in for the rst time, he or she is guided through a tutorial.
The navigation, basic settings, and the change from the Simplied to the Extended
view is shown.
3.4 Simplied and extended view
The conguration of the devices can be carried out in the myREX24 V2 portal in two
views: simplied and extended.
Standard is the simplied view, but one can switch between the views at any time.
The simplied view is used for the most part in the subsequent course of the Quick
Start Guide. The extended view is also presented in some places for purposes of
illustration.

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Simple view
Extended view

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?
4. Initial REX conguration via the myREX24-V2 portal
The following information describes the basic conguration steps required in order
to be able to set up a REX router for a VPN connection.
A description of the extended functions can be found with the online help or in the
manuals/white papers. You can go to the online help
in the myREX24 V2 portal via the question mark symbol in the lower left area of the
screen .
When you have logged in for the rst time, the myREX24 portal guides you through
a brief tutorial.
Please change the password for your myREX24 account following the tutorial.
4.1 Create new project
A project is the highest level for carrying out the following tasks:
-Device administration
-Remote maintenance
-Monitoring and alarms
-Data protocoling
-Visualizations
Each router is assigned to a project. In order to create a new project,
please click on Administration.
The tutorial also leads to this point .
The project is now assigned a name.

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4.2 Create new device
A router can be added in the tree structure using the plus symbol or with a right-
click of the mouse. If a project does not yet have a router, the same function is made
available in the main view by way of the green button “Create new device”.
Clicking on the respective button starts the conguration assistant, which guides the
user through the settings.
4.3 Congure REX 100 (connection data)
Three simple steps are adequate for the minimal conguration of the router:
-Selection of the device type
-Network settings
-Transfer of the conguration to the REX router
4.3.1 Step 1 “Device” – Selection of the type and name
In the rst step, only the selection of the router type and the assignment of a clear
name is necessary.
The name can be selected freely, but only numbers and letters are allowed
(0 to 9, A to Z, a to z, no spaces).

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4.3.2 Step 2 “Internet” – Network settings
In step 2, the network conguration for the LAN and mobile WAN side of the device
is dened.
-LAN All REX 100 routers come with the IP address 192.168.0.100/24 as a
default. Modify the IP address and the subnet mask in keeping with the
machinery network.
-WAN Here the data are entered for the WAN connection (company network
for the machine) – DHCP or static IP address.
The corresponding data provides you with the responsible network
administrator.
-WiFi Enter the WiFi-specic access data (only 700-875-WIF01).
The corresponding data provides you with the responsible network
administrator.
4.3.3 Step 3 “Conguration” – Transfer of the conguration
The minimal conguration is now complete and must be transferred to the REX 100.
The conguration is downloaded with a click on the download button and can be
transferred with a FAT-formated USB stick to the REX router. This step is described in
chapter 5.1 (page 12).

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5. Router conguration transfer options
The created device conguration can be transferred to the actual REX 100 unit in a
variety of ways.
-1. Download conguration to the PC (via USB stick)
The conguration le is saved on the PC and can subsequently be transferred to
the REX 100 using a USB stick (subsequent procedure in chapter 5.1).
-2. Transfer conguration to the device (LAN connection – only possible via
shDIALUP)
The conguration is transferred via a local LAN connection from the PC on which
shDIALUP is installed to the device.
You can select this procedure if the REX 100 can be reached directly through the
local network (LAN).
-3. Synchronization (retroactive changes)
When the router has already been congured and a connection with the portal
established, any change to the conguration can be carried out via the existing
VPN connection (subsequent procedure described in chapter 5.2).
For purposes of simplication, only the transfer via USB stick (point 1) is explained
in this Quick Start Guide, and how retroactive changes can be transferred via the
function “Synchronization” (Point 3).

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5.1 Transferring the con guration using a USB  ash drive
Prerequisites for this are:
-A PC with USB connection
-An Internet connection with the myREX24 V2 portal
-A FAT-formated USB stick
In the myREX24-V2 portal, select the “Download con guration to PC” option in the
device settings.
Download the con guration  le provided by the myREX24 portal to your PC and
save it on a FAT-formated USB stick.
The  le is called myrex24.mbn for the initial commissioning of the REX 100.
All of the following con guration  les generated for this router are automatically
generated by the system as myrex24.mbnx.
Do not rename this  le.
Now carry out the steps described on page 21 in chapter 11 “Load con guration/
 rmware update from the USB stick”.

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5.2 Synchronization
As soon as you have logged into your account of the REX 100, you can transfer
retroactive changes
at any time through “Synchronization”.
Where there is an existing myREX24-V2 portal connection, the REX 100 checks cycli-
cally whether there is a new conguration available and then loads it automatically.
When, for example, you have edited the LAN IP address, the “Device conguration is
not up to date” symbol appears next to the Online LED.
Click on Synchronization to initiate this.
Synchronization in the extended viewSynchronization in the simplied view

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The synchronization function is conrmed through the following dialog.
In this menu you can set a variety of user-dened settings, such as the sending of
information/conrmation mails.
The REX router now adopts the new settings and restarts. As soon as the boot pro-
cess has concluded, the REX router logs into the portal again.
0
6. Establishing a VPN connection to your REX 100
Note: The following steps presume that the REX 100 has already been congured and
that you have successfully logged into your account at the portal. A VPN connection can
only be started with shDIALUP. The connection button is not shown in the browser view.
Logged in REX 100 routers are identied with a green circle in the dashboard. The
VPN connection is established by clicking on the connection button.
The number of active connections is shown in the menu bar .
Once a connection to the REX 100 has been established, all the IP packets that are
valid for the applicable LAN network on the system side will be forwarded. Further
parameters for the VPN-IP/IP subnet mask are shown in the lower status bar.

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7. Tips and tricks
7.1 Establishing of connection isn’t working
7.1.1 Check device status
The device status website of the REX 100 shows the connection status and the active
conguration data of the router. To this purpose, the REX 100 must be accessible in
the LAN, meaning that the TCP/IP address of a PC must be in the same IP subnet.
To this purpose, enter the LAN IP address of the REX 100 into the address bar of a
browser.
Authenticate yourself with the standard
-user: helmholz and the
-password: router
To view more information on each step of the connection, click on the Info icon
in the status elds.
Note: If the website of the REX 100 is not accessible, please check the corresponding set-
ting in the myREX24 portal. Make sure that there are no address space conicts with any
other network interfaces (do not assign the same IP address more than once) in order to
be able to communicate with the REX 100.
The connection status with the REX 100 is represented with an orange LED .
In order to end the connection of a remote access, please click the in the meantime
yellow and animated connection button and then conrm the disconnection of the
remote connection.

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7.1.2 VPN port
-The REX 100 establish an outbound TCP connection with the address VPN-V2.
myrex24.net (5.39.123.21). This communication takes place via the port 1194 as a
standard.
-In order to be able to establish a secure connection to the myREX24 V2 server, at
least one of the following TCP ports (80, 443, or 1194) for the VPN tunnel must be
open.
Please clarify which setting is required in advance with the responsible IT department
on site. You can adjust the port correspondingly in the VPN settings of the REX 100.
7.1.3 Diagnostics page
In the event of irregularities or interruptions when establishing the connection, the
diagnostics page supports you with troubleshooting. In the event of an error, the
technical support of Helmholz requires the respective result from the individual and
autonomous test functions.
7.1.4 Enabling the MAC address of the REX 100
It may be necessary to approve the MAC address of the REX 100 in the higher level
DSL modem or the rewall. If it should not be possible to establish a connection,
please ask your network administrator whether a MAC address lter has been acti-
vated.

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7.1.5 Establishing a connection via a proxy
It is possible to store a proxy on the conguration page of the REX 100. The required
parameters can be adapted under the Internet settings of the router.
7.2 Device conguration: Services – NTP server
For purposes of time synchronization of the REX 100, this carries out a comparison
at regular intervals. Where necessary, you can individually set the preset NTP server
and the interval.
Note: The REX 100 requires a current time setting to function correctly.
7.3 Device conguration: Services – mail settings
If you would like to use the function for the automatic sending of e-mails of the
REX 100 (WAN), port 25 (SMTP) may not be blocked in the rewall in the customer
network. You can also use alternative e-mail servers to send e-mails.

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8. Remote maintenance of Ethernet CPUs
The integrated 3 or 4-port switch is suitable for 100 Mbps and full duplex operation
and supports auto-crossover and auto-negotiation. No special PROFINET functions
are supported.
8.1 Device settings: Services – Firewall Settings – SNAT
With a REX 100, the SNAT function is activated as a default. With this setting, par-
ticipants for which no gateway*/router has been entered are reached via the VPN
tunnel. For the CPUs and panels of some manufacturers, it can be the case that you
need to explicitly enter the gateway* and deactivate the SNAT function in order that
a remote connection with the end device is possible.
In order to reach a PLC or a panel via the VPN tunnel, the open VPN adapter must be
selected in the corresponding software modules as the interface. The virtual network
connection responsible for this is the TAP Windows2Adapter V9.
The setting to be selected in the PG/PC interface module from the SIMATIC STEP 7¹
software is emphasized in the detail to the right.
* Gateway: This refers to the LAN IP address of the REX 100.
Notes:
-Please note that the P1 LAN interface is started delayed for technical reasons in the
event of a device reset/switching on of the device in the case of REX 100 WiFi devices..
-When connecting additional Ethernet participants (PLC/panel) on the REX 100, it must
be ensured that the IP addresses of the devices lie within the address range of the LAN
interface of the REX 100.

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9. Description of LEDs and buttons
9.1 Description of LEDs and buttons
PWR Indicator light for the power supply
RDY Readiness indicator (this LED must show a solid light after a max. of 110
sec.)
CON Off: There is no active Internet or VPN connection
Solid light: Internet connection active or possible, but VPN connection
inactive
Flashing (1.5 Hz): VPN connection is active
Rapid ashing (3 Hz): The router is attempting to establish a VPN
connection
USR Solid light: When loading default settings, rmware les, or device
congurations
Flashing (1.5 Hz): A portal conguration was recognized on the USB
stick (see FCN button)
Rapid ashing (3 Hz): A rmware le was recognized on the USB stick
(see FCN button)
FCN 1. Function key for manually establishing the connection with the portal
server
2. If the USR LED starts ashing, this means that you have ten seconds to
press this button in order to load data from an inserted USB stick.
RST Reset button for restarting the router
Button functions
P4 LANP1 LAN P2 LAN P3 LAN
+F E IN1I N2–
FCN
RST
PWR
RDY
CON
USR
SN:
R00012345
ANT
USB

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The device is not connected with the portal
The device has logged in at the portal and is thus online.
Depending upon the device type, the device is connected with
-a machine connected with the device (PLC)
-the website of a connected machine
-the integrated web server of the device (router)
The device conguration is not up to date. This means:
-the conguration of a newly created device has not yet been transferred
to the device
-or the changed conguration of an existing device has not yet been trans-
ferred to the device/no synchronization has been carried out.
This symbol can be displayed in connection with any of the symbols named
above.
9.2 myREX24 V2 portal LEDs
Information points for detailed information about the status of the interface