Helmholz WALL IE Compact User manual

Helmholz GmbH & Co. KG | Hannberger Weg 2 | 91091 Großenseebach | Germany 27.04.2023
Phone [phone] | Fax [phone] | [e-mail] | www.helmholz.de
Quick Start Guide
WALL IE / WALL IE PLUS / WALL IE Compact,
Industrial NAT Gateway/Firewall
Order number:
WALL IE 700-860-WAL01 as of firmware V 1.10.100
WALL IE PLUS 700-862-WAL01 as of firmware V 1.00.000
WALL IE Compact 700-863-WAL01 as of firmware V 1.00.000
Version
en
17

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Content
1Safety instructions ................................................................................................ 3
2Introduction ......................................................................................................... 4
3Connecting the WALL IE ....................................................................................... 5
4Initial access to the web interface......................................................................... 6
5Main view ............................................................................................................. 7
6Choosing the operating mode.............................................................................. 7
6.1 The NAT operating mode ............................................................................................................. 7
6.2 The Bridge operating mode .......................................................................................................... 8
7Application „NAT“ ................................................................................................ 9
7.1 Adjustment of the IP addresses in the NAT operating mode .......................................................... 9
7.2 Setting up “Basic NAT” rules....................................................................................................... 10
7.3 Packet filter “WAN to LAN” ......................................................................................................... 11
7.4 Packet filter “LAN to WAN” ......................................................................................................... 12
7.5 SNAT .......................................................................................................................................... 13
7.6 NAPT .......................................................................................................................................... 14
7.7 Portforwarding ........................................................................................................................... 15
8Application “Bridge” .......................................................................................... 16
8.1 Adjustment of the IP addresses in the bridge operating mode..................................................... 16
8.2 Packet filter “WAN to LAN” ......................................................................................................... 17
8.3 Packet filter “LAN to WAN” ......................................................................................................... 18
9Firmware update ................................................................................................19
10 LEDs status information ...................................................................................20
10.1.1 WALL IE (700-860-WAL01) .................................................................................................. 20
10.1.2 WALL IE PLUS (700-862-WAL01).......................................................................................... 20
10.1.3 WALL IE Compact (700-863-WAL01) ................................................................................... 20
11 Function of the buttons ................................................................................... 20
12 Technical data .................................................................................................21

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1Safety instructions
Target audience
This description is only intended for trained personnel qualified in control and automation
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 personnel is
to ensure that the application or the use of the products described fulfills all safety requirements, including
all applicable laws, regulations, provisions, and standards.
Intended use
The devices have a protection rating of IP 20 (open type) and must be installed in an electrical
operating room or a control box/cabinet in order to protect them against environmental
influences. 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 parties, 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 devices requires proper transport, storage, setup,
assembly, installation, commissioning, operation, and maintenance. Operate the devices only
in flawless condition. The permissible operating conditions and performance limits (technical
data) must be adhered to. Retrofits, changes, or modifications to the devices are strictly
forbidden.
Security
The devices are network infrastructure components and therefore an important element in the
security consideration of a plant. When using the devices, therefore, observe the relevant
recommendations to prevent unauthorized access to installations and systems. Further
information on this can be found in the device manuals.

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2Introduction
WALL IE, the Industrial NAT Gateway and Firewall, simply integrates machine networks into the high-
level production or company network using network segmentation, packet and MAC address filtering.
The product range consists of two variants: WALL IE (700-860-WAL01), WALL IE PLUS (700-862-
WAL01) and WALL IE Compact (700-863-WAL01). Unless otherwise noted, this document describes
functions that support all devices equally.
The NAT operating mode serves the forwarding of the data traffic between various IPv4 networks. It
enables the address translation via NAT and uses packet filters for the limitation of access to the
automation network located below.
In the Bridge operating mode, the WALL IE acts as a network bridge in an IPv4 subnetwork. In contrast
to normal switches, packet filtering is possible in this operating mode. This means that the restriction of
access to individual areas of your network can be achieved without having to use different networks for
this purpose.
This document explains the initial commissioning of the WALL IE, WALL IE PLUS or WALL IE Compact
using the "NAT" and "Bridge" application examples. Only the most important settings are
explained.
For a detailed description of all functions and important safety instructions, please
refer to the WALL IE manual. This can be found at www.helmholz.de or scan the
QR code directly.

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3Connecting the WALL IE
The WALL IE must be supplied with DC 24 V at the wide range input 18-30 V DC via the supplied
connector plug. The connection (FE) is for the functional earth. Connect it properly to the reference
potential. The WALL IE is designed exclusively for operation with safety extra-low voltage (SELV/PELV).
The RJ45 socket "P1 WAN" of the WALL IE (700-860-WAL01) is used to connect the external network.
The RJ45 sockets "P2 LAN-P4 LAN" are switched and are used to connect the internal network.
The RJ45 sockets "X1 P1" to "X1 P8" of the WALL IE PLUS (700-862-WAL01) can be assigned to the
network WAN or LAN as desired. In the factory setting, port P1 is set for WAN and ports P2-P8 for LAN.
The LEDs next to the port indicate the assignment, orange for WAN and green for LAN. Setting the
assignment of the ports for WAN and LAN is possible in the web interface. More detailed information can
be found in the manual.
The WALL IE Compact (700-863-WAL01) has a socket "X1 WAN" at the top for the external network and
a socket "X1 LAN" at the bottom for the internal network.
The inputs IN1 and IN2 of the WALL IE and WALL IE PLUS have no function in the current firmware
version but will be available for external switching of firewall rules in a later firmware version.
The WALL IE Compact has no inputs.
The housing of the WALL IE is not grounded. Please connect the functional earth connection (FE) of
the WALL IE properly to the reference potential.
The device may only be operated with power supplies that meet the specifications of EN 62368-1 for
power sources of limited capacity. Otherwise, the device must be operated in an enclosure that meets
the requirements of a fire protection enclosure according to EN 62368-1.

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4Initial access to the web interface
The WALL IE is delivered from the factory with the IP address 192.168.0.100 and the subnet mask
255.255.255.0 on the LAN side. Access to the web interface is possible with the WALL IE (700-860-
WAL01) via the LAN ports P2 - P4. With the WALL IE PLUS (700-862-WAL01), access is possible via the
ports P2 - P8 or via all ports whose LED lights up green in the delivery state. With the WALL IE Compact,
the web interface can be accessed via "X1 LAN".
The IP address of your network adapter must first be
set in accordance with the IP subnet of the WALL IE.
In the network settings of the network adapter, set
the subnet mask and the IP address of the PC to
match the default IP address of the WALL IE, e.g.
196.168.0.1 with subnet mask 255.255.255.0.
Now connect a patch cable with the LAN connection
of your PC and one of the LAN ports of WALL IE.
The web interface can be reached in the delivery
condition by entering URL “https://192.168.0.100” in the browser page.
For security reasons, the web interface can only be reached through a secured HTTPS connection. An
exception rule must be confirmed in the browser once to reach the website. A certificate for the
connection backup can be stored in the “Device/HTTPS” menu.
With the first login you will be requested to set a password for the “admin” user.
The password must contain at least 8 characters and
can be up to 128 characters long, it can contain
special characters and numbers. With the button
"Continue" the password will be saved in the device
and you will be redirected to the "Overview" page of
the WALL IE.
The main user is always “admin”.
In addition to the main user, the “it-user” and
“machine-user” can also be used with limited rights.
The users can be activated, and the affiliated
passwords set in the “Device/Password” menu.
Please memorize the password carefully! For security reasons, there is no way to reset the password
without setting the device to factory settings.

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5Main view
The “Overview” website of the WALL IE
always opens after the login. The
“Overview” main view contains an
overview of the most important settings
and information of the WALL IE.
The topmost line contains the menu with
the functions for configuration.
Please check the WALL IE website for a newer firmware version. The firmware update is described
on page 19.
6Choosing the operating mode
Depending on the application for the WALL IE, the operating mode must be defined at the beginning.
WALL IE supports two basic modes of operation: NAT and Bridge.
6.1 The NAT operating mode
When an automation cell with preset IP addresses is to be incorporated into a company network with
other IP addresses, the IP addresses of the machine must normally all be set again.
When using Network Address Translation
(NAT), WALL IE offers the possibility to
leave the IP addresses of the machine as
they are, but to enable communication with
the machine network with own IP addresses
from the company network.
In the NAT operating mode, WALL IE
forwards the data transfer between various
IPv4 networks (Layer 3) and exchanges the
IP addresses with the help of NAT.
Packet filters and MAC address filters can
also be configured to control the data
transfer permitted.
Broadcast traffic is generally filtered at the WALL IE, which means that the time behavior of the machine
network is not impaired by the company network.

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Basic NAT, also known as “1:1 NAT” or “Static NAT”, is the translation of individual IP addresses or of
complete IP address ranges.
With the help of port forwarding, it is
possible as an alternative to configure those
packets be forwarded to a particular
TCP/UDP port of the WALL IE to a certain
participant in the machine network (LAN).
The NAT operating mode thus also allows
the integration of several automation cells
that use an identical IP address range into
the same Company network.
Each automation cell can be assigned
different free IP addresses from the
company network.
If “NAT” is your planned application case, please continue reading on page 9.
6.2 The Bridge operating mode
In the Bridge operating mode, WALL IE behaves like a layer 2 switch between the machine network
(automation cell) and the company network. The IP addresses in the company network are in this case in
the same IP address space (subnet) as the addresses in the machine network.
Access between the two network areas can
be limited or secured with packet filters and
MAC address filters.
This allows the separation of part of the
company network without using different
network addresses.
If “bridge” is your planned application case,
please continue reading on page 16.

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7Application „NAT“
To activate the NAT operating mode, select the
“Operating Mode” menu point in the “Device”
menu and set this to “NAT”.
7.1 Adjustment of the IP addresses in the NAT operating mode
Click on the “Network” menu and select the sub-
menu “Interface”. The IP addresses of the WALL IE
in the WAN and in the LAN (“WAN IP”/”LAN IP”),
as well as the affiliated subnet masks (“WAN
netmask”/”LAN netmask”) can be defined here.
A DNS server and a default gateway can also be
indicated. This is necessary when devices from the
LAN should reach the Internet via the WALL IE.
If these are not indicated (“0.0.0.0”), then
communication of devices in the LAN with the
Internet is prevented. It is necessary to indicate a
DNS server for the SNTP service.
Optionally, the WAN-IP settings, the DNS server,
and the default gateway can also be obtained using
DHCP.
The entry is saved with the “Submit” button and the IP settings are then activated immediately. The
current entry is rejected without acceptance with “Decline”.
If you change the LAN IP address, you may need to reopen the WALL IE web page on the browser
under the new IP address and log in again.

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7.2 Setting up “Basic NAT” rules
To use Basic NAT functionalities, the operating mode of the WALL IE must be set to "NAT". Select the
"NAT" menu and the "Basic NAT" submenu. Enter the first rule and save it using the button.
The "External IP" is a free IP address from the WAN IP address range. This must not have been assigned to
any other Ethernet station (in the WAN) yet! The "Internal IP" is the existing IP address of the network
node in the machine (LAN). As “Comment” any text can be entered. With this 'additional WAN
interface' the address conversion ("natting") to the entered LAN IP (the target device) is then realized in
the WALL IE.
Status: = Rule is active, a click on the lamp symbol changes the rule status to inactive
= Rule is inactive, a click on the lamp symbol changes the rule status to active
Possible actions: delete a rule edit a rule copy a rule
In the case of a “Basic NAT” rule, all ports for “WAN to LAN” data transfer are initially blocked for
this rule for security reasons! In order to enable access, packet
filter rules must be created or the default action for the packet
filters be set to “Accept”. The “LAN to WAN” data transfer is
initially always enabled but can also be limited by packet filters rules or the
default action.

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7.3 Packet filter “WAN to LAN”
The packet filters can be used to restrict access between the company network (WAN) and the machine
network (LAN). For example, it can be configured that only certain subscribers from the company
network are allowed to exchange data with defined subscribers from the automation cell.
The following filter criteria on layers 3 and 4 are available: IPv4 addresses,
protocol (TCP/UDP/ICMP), and ports.
Click on the “Packet Filter” menu and select the sub-menu “WAN to LAN”.
With the “Default Option” you can set whether all frames are generally
allowed (“Accept”) and only special packets are filtered (“Blacklisting”), or
whether all frames are generally prohibited (“Reject” / “Drop”) and only those frames are allowed to pass
through that correspond with the filter rules (“Whitelisting”).
If you initially do not wish to filter, set the default action to
“Accept”.
In order to limit access to the machine network to certain participants in the WAN, set the default action
to “Reject” or “Drop”. In the case of prohibited frames from the
WAN, “Reject” sends an error message in response, while
“Drop” rejects the frame without sending an error message.
Example: A PC in the company network
(WAN) has the IP address 10.10.1.11 (e.g.
a visualization).
This PC should be able to access the CPU
with the IP address 192.168.10.1 within
the LAN via the port 102 with the help of
the TCP protocol.
Now enter the following rule and save it with the button.
Source IP indicates the IP address of the active device in the company network (WAN).
Destination IP specifies the addressed device in the machine network (LAN).
The filter rules can be defined for one protocol type with protocol “TCP”, “UPD” or “ICMP”.
Destination Ports indicates the ports to which the filter rules apply.

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If a filter rule applies to several or even all ports, this can be simply defined in the “Destination Ports”
field. A list of ports is indicated separated by commas: “80,443,1194”. A port range can be indicated with
a colon “4000:5000” or “1:65535” for all ports. Combinations are also possible: “80,443,4000:5000”.
It is also possible to configure the access of several participants with one another. An IP range can be
defined with a dash: “10.10.1.10-10.10.1.20“. A list of IP addresses is indicated with commas:
“10.10.1.10,10.10.1.15,10.10.1.20”. IP subnet can be also declared using CIDR notation: "10.10.1.10/24".
Action defines whether this rule allows communication (“Accept”), rejects with error message (“Reject”),
or simply rejects (“Drop”). The appropriate method here should always be chosen in interaction with the
“Default Action”. If the Default Action is, for example, “Reject” or “Drop”, the filter rules should all be set
to “Accept” (Whitelisting). If the Default Action is “Accept”, a block can be defined in the filter rules with
“Reject” or “Drop” for certain devices (Blacklisting).
7.4 Packet filter “LAN to WAN”
By default data traffic is permitted for devices from the machine network (LAN) to the company network
(WAN) without limitations (“Default Action”: “Accept”).
General rule can be changed by setting the "Default Action" to "Reject" or "Drop". In addition to general
rule, filtering can be further customized using specific packet filter rules."
The entry of the filter rules corresponds to the "WAN to LAN" packet filter rules, the source IP now
indicates the IP address of the active device in machine network (LAN), and destination address
represents the device in company network (WAN).

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7.5 SNAT
The function “SNAT (Source NAT)” transparently forwards incoming traffic from the WAN side to the
LAN network. To all packets, forwarded on LAN side by WALL IE, source IP address is replaced with
WALL IE LAN IP address.
Therefore, none of the LAN
participants needs the WALLIE
LAN-IP as „gateway“. This is a
considerable advantage when
integrating into existing network
structures since the parameters no
longer have to be changed here.

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7.6 NAPT
“NAPT for LAN to WAN traffic” replaces the sender addresses of queries from the LAN with the WALL IE
WAN IP address.
The option “NAPT: Active” thus enables communication of devices from the LAN with devices in the
WAN. WALL IE thereby acts as a gateway to administer the implementation to the IP addresses of the
WAN network and looks after the assignment of the response.
In order for the communication from LAN to WAN to work when NAPT is activated, the WALL IE
LAN IP address must be entered as gateway in all devices on the LAN!
If the NAPT option is deactivated, the query packets from the LAN are forwarded from the LAN to the
WAN with their original sender IP and sender port.
Source IP 10.10.1.1:xxx
Source 192.168.10.1:80

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7.7 Portforwarding
With the help of port forwarding (“Port
forwarding for WAN to LAN traffic”), it can
be configured that packets at a certain
TCP/UDP port of the WALL IE (WAN) can be
forwarded to a participant in the LAN (e.g.
10.10.1.1:81 to 192.168.10.5:80).
In the following example, the website (Port
80) of the CPU with the IP 192.168.10.5 via
WAN can be reached through access to the
WALL IE-own IP address 10.10.1.1 with Port
81.
Protocol: “TCP” or “UDP”
External port: Port number through which the device on LAN side is accessed. On LAN side, device is
accessed using internal IP address and internal port number.
Internal IP: IP address of device connected to LAN.
Internal Port: Port used to access device connected to LAN.
Comment: Freely definable comment.
"Portforwarding" and "Basic NAT" can be used simultaneously in NAT operating mode. If the
default action for the "WAN to LAN" packet filters is set to "Reject" or "Drop", corresponding filter
rules for access must also be created for each port forwarding entry.

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8Application “Bridge”
To activate the bridge operating mode, select
the "Operating Mode" menu item in the
"Device" menu and set it to "Bridge".
8.1 Adjustment of the IP addresses in the bridge operating mode
Click on the “Network” menu and select the sub-menu “Interface”. The IP addresses of the WALL IE
(“LAN IP”) and affiliated subnet mask (“LAN netmask”) can be defined here.
A DNS server and a default gateway can also
be indicated. This is necessary when devices
from the LAN should reach the Internet via
the WALL IE. If these are not indicated, then
communication of devices in the LAN with
the Internet is prevented.
The entry is saved with the “Submit” button
and the IP settings are thus activated
immediately. The current entry is rejected
without acceptance with “Decline”.
If you change the LAN IP address, you may need to reopen the WALL IE web page on the browser
under the new IP address and log in again.
In bridge mode, all ports are initially blocked for "WAN-to-LAN" data traffic for security reasons! To allow
access, packet filter rules must be created or the "Default Action" for
the packet filters must be set to "Accept".
LAN to WAN traffic is always enabled by default but can also be restricted by packet filters or the default
action.
A DHCP client or a DHCP server are not available in the bridge operating mode.

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8.2 Packet filter “WAN to LAN”
The packet filters enable the limitation of access between the company network (WAN) and the machine
network (LAN). For example, it can be configured that only certain participants from the company
network may exchange data with defined participants in the automation
cell.
The following filter criteria on layers 3 and 4 are available: IPv4 addresses,
protocol (TCP/UDP/ICMP), and ports.
Select the “WAN to LAN” menu point in the “Packet Filter” menu.
With the “Default Option” you can set whether all frames are generally allowed (“Accept”) and only
special packets are filtered (“Blacklisting”), or whether all frames are generally prohibited (“Reject” /
“Drop”) and only those frames are allowed to pass through that correspond with the filter rules
(“Whitelisting”).
If you initially don’t wish to filter, set the default action to
“Accept”.
In order to limit access to the machine network to certain participants in the WAN, set the default action
to “Reject” or “Drop”. In the case of prohibited frames from the
WAN, “Reject” sends an error message in response, while
“Drop” rejects the frame without sending an error message.
Example: A PC in the company network (WAN)
has the IP address 10.10.1.11 (e.g. a
visualization).
This PC should be able to access the CPU with
the IP address 10.10.1.30 within the LAN via
the port 102 with the help of the TCP protocol.
Now enter the following rule and save it with the button.
Source IP indicates the IP address of the active device in the company network (WAN).
Destination IP the addressed device in the machine network (LAN).
The filter rules can be defined for one protocol type with protocol “TCP”, “UPD” or “ICMP”.
Destination Ports indicates the ports to which the filter rules apply.

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If a filter rule applies to several or even all ports, this can be simply defined in the “Destination Ports”
field. A list of ports is indicated separated by commas: “80,443,1194”. A port range can be indicated with
a colon: “4000:5000” or “1:65535” for all ports. Combinations are also possible: “80,443,4000:5000.”
It is also possible to configure the access of several participants with one another. An IP range can be
defined with a dash: “10.10.1.10-10.10.1.20“. A list of IP addresses is indicated with commas:
“10.10.1.10,10.10.1.15,10.10.1.20”. IP subnet can be also declared using CIDR notation: "10.10.1.10/24".
Action defines whether this rule allows communication (“Accept”), rejects with error message (“Reject”),
or simply rejects (“Drop”). The appropriate method here should always be chosen in interaction with the
“Default Action”. If the Default Action is, for example, “Reject” or “Drop”, the filter rules should all be set
to “Accept” (Whitelisting). If the Default Action is “Accept”, a block can be defined in the filter rules with
“Reject” or “Drop” for certain devices (Blacklisting).
8.3 Packet filter “LAN to WAN”
By default data traffic is permitted for devices from the machine network (LAN) to the company network
(WAN) without limitations (“Default Action”: “Accept”).
General rule can be changed by setting the "Default Action" to "Reject" or "Drop". In addition to general
rule, filtering can be further customized using specific packet filter rules.

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9Firmware update
The firmware of the WALL IE can be very simply updated via the website. Please download the firmware
update file in advance.
Link to firmware:
http://www.helmholz.de/goto/700-860-WAL01
http://www.helmholz.de/goto/700-862-WAL01
http://www.helmholz.de/goto/700-863-WAL01
The firmware file can be recognized by “.HUF” extension (Helmholz Update File) and is also encoded to
protect it from being changed.
Save the firmware file on your PC and select the location with "Browse" in the "Device" menu under
"Firmware Upgrade".
The firmware file is then transferred to the
WALL IE. This can take up to 1 minute.
The firmware file is decrypted and checked
in WALL IE. If the content is correct, the
firmware is transferred retentively to the
program memory and then an automatic
restart is performed.
During the update process, the operation of the WALL IE is interrupted. Do not switch off the device
during the update process..
The configuration of the WALL IE is retained when updating to a higher version, as far as this is
technically possible. However, a "downgrade" to an older firmware version can lead to configuration
errors. It is recommended to perform a factory reset after a downgrade.
After a firmware update it may be necessary to clear the browser cache once to update outdated
JavaScript elements of the WALL IE website.

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10 LEDs status information
10.1.1 WALL IE (700-860-WAL01)
PWR
Off
No power supply or device defective
On
Device is correctly supplied with voltage
RDY
On
Device is ready to operate
ACT
Flashing or on
Permitted data transfer between WAN and LAN
USR
Flashing light
Reset to works setting activated
RJ45 LEDs
Green (Link)
Connected
Orange (Act)
Data transfer at the port
10.1.2 WALL IE PLUS (700-862-WAL01)
PWR
Off
No power supply or device defective
On
Device is correctly supplied with voltage
RDY
On
Device is ready to operate
ACT
Flashing or on
Permitted data transfer between WAN and LAN
USR
Flashing
Reset to works setting activated
LEDs at
RJ45 Ports
Orange
Port is assigned to the WAN network
Green
Port is assigned to the LAN network
Green (Link) flashing
Connected with 100 Mbps
RJ45 LEDs
Green (Link) on
Connected with 1000 Mbps
Orange (Act)
Data transfer at the port
10.1.3 WALL IE Compact (700-863-WAL01)
PWR
Off
No power supply or device defective
On
Device is correctly supplied with voltage
RDY
On
Device is ready to operate
ACT
Flashing or on
Permitted data transfer between WAN and LAN
USR
Flashing
Reset to works setting activated
Green (Link) flashing
Connected with 100 Mbps
RJ45 LEDs
Green (Link) on
Connected with 1000 Mbps
Orange (Act)
Data transfer at the port
11 Function of the buttons
The "FCN" button can be used to reset the WALL IE to factory
settings. The "FCN" button must be held down during the start-
up phase of the WALL IE. The successful resetting of the
parameters and settings is acknowledged by the "USR" LED
lighting up during the boot process. The "FCN" button can then
be released.
The "RST" button triggers an immediate restart of the WALL IE
in which all saved settings are retained. The WALL IE Compact does not have a reset button.