Gude EMC Professional NET 19 inch User manual

EMC Professional NET(19“)
Manual
Time Server with integrated DCF77 Time Receiver for
Industrial Applications

3EMC Professional NET
Manual EMC Professional NET(19“)
© 2019 GUDE Systems GmbH
Rev. 2.3

3EMC Professional NET
Content
Security declaration 5
1 Description 6
2 Hardware 7
2.1 Content of delivery 7
2.2 Installation 8
2.3 Display 8
2.4 Alignment of the active antenna 10
3 Network operation 12
3.1 EMC Prof NET (19“) as SNTP-Server 12
3.2 Time synchronization as SNTP-Server 12
3.2.1 Windows XP/Vista 12
3.2.2 Windows 9x/NT/2000 13
3.2.3 Linux 14
4 Operation via serial interface 16
4.1 Operation under Windows 16
4.1.1 Installation of the Software 16
4.1.2 Settings 16
4.1.3 Interface 18
4.1.4 Logmode 19
4.2 Operation under Linux (NTP) 20
4.2.1 NTP installation 20
4.2.2 NTP configuration 20
4.2.3 Starting NTP 21
4.2.4 Setup of a NTP daemon 22
4.3. V.24 protocols 23
4.3.1 Gude standard time protocol 23
4.3.2 Gude UTC time protocol 23
4.3.3 XNTP time protocol 23

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5 Configuration 24
5.1 Automatic configuration by DHCP 24
5.2 Network configuration by GBL_Conf.exe 24
5.3 Configuration by Webinterface 25
5.4 IP Access Control List 30
5.5 SNMP 31
5.6 Syslog 32
5.7 Presentation of the recent configuration 32
6 Features 33
6.1 Bootloader mode 33
6.2 Firmware update 33
6.3 Technical information 34
7 Support 35
Declarations 36
Contact 37

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Security declaration
The device must be installed only by qualified personnel accord-
ing to the following installation and operating instructions.
The manufacturer does not accept responsibility in case of im-
proper use of the device and particularly any use of equipment
that may cause personal injury or material damage.
The device contains no user-maintenable parts. All maintenance
has to be performed by factorytrained service personnel.
Check if the power cord, the plug and the socket are in proper
condition.
The device can be connected only to 230V AC (50 or 60 Hz)
sockets.
Always connect the device to properly grounded power sock-
ets.
The device is intended for indoor use only. Do NOT install them
in an area where excessive moisture or heat is present.
Because of safety and approval issues it is not allowed to modify
the device without our permission.
Please note the safety advises and manuals of connected de-
vices, too.
The device is NOT a toy. It has to be used or stored out or range
of children.
Packaging material is NOT a toy. Plastics has to be stored out of
range of children. Please recycle the packaging materials.
In case of further questions, about installation, operation or usa-
ge of the device, which are not clear after reading the manual,
please do not hesitate to ask our support team.

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1 Description
EMC Professional NET (EMC Prof NET (19“)) provides ac-
cess to one of the most exact working atomic clocks in the
world. It is run by the Physikalisch-Technische Bundesanstalt
(PTB) in Braunschweig/Germany. Time and date are broad-
casted by the DCF77 long-wave sender in Frankfurt/Mainflingen
in Germany on a frequency of 77,5 kHz. The broadcasted time
and date information are CET/CEST. The range of DCF77 is
about 2000km.
EMC Prof NET (19“) receives the DCF77 signal, using an ac-
tive antenna. The received time and date information can be
published in a network using NTP or via serial interface to a
single PC.
EMC Prof NET (19“) acts as stand-alone SNTP-Server. All PCs
in the network can synchronise with EMC Prof NET (19“).
EMC Prof NET (19“) was designed for a safe implementation
in a environment, which is polluted by electro-magnetic inter-
ferences. To secure a proper receive, EMC Prof NET (19“) is
equipped with a precise electronic.
In case of longer receiving problems, EMC Prof NET (19“)
automatically switches to its internal battery buffered real time
clock and provides further on the exact time and date. When
the quality of the received signal has gone good enough again,
EMC Prof NET (19“) switches back to radio time.
Features of EMC Prof NET (19“):
 Digital filter and intelligent failure correction
 Signal monitor with LED line
 Battery buffered real time clock
 Stand-alone Time server (SNTP)
 Νetwork configuration via DHCP
 Configuration over Ethernet (HTTP)
 Programmable Relais switch (without potential)
 Syslog
 SNMP (v1, v2c)

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Figure 1 Front EMC Prof NET Figure 2 Rear EMC Prof NET
3 4 5 6 7 8 9 10 111 2
1 Display
2 Radio Time LED
3 RS232 LED
4 Clock rate LED
5 Signalmonitor
6 Ethernet connector (RJ45)
Figure 3 Front EMC Prof NET 19“
Figure 4 Rear EMC Prof NET 19“
12, 3, 4 5 6 78 9
10
11 12
7 Relay contact (without potential)
8 Serial interface (RS232)
9 Bootloader button
10 Power inlet
11 Connector for Active antenna (BNC)
12 Power switch (only EMC Prof NET 19“)
2 Hardware
2.1 Content of delivery
The delivery includes:
 EMC Prof NET (19“)
 Power adaptor (EMC Prof NET) /
Power cable IEC (EMC Prof NET 19“)
 Serial Interface Cable (Sub-D)
 Network cable
 CD-ROM incl. software and manual
 Active antenna (only in EMC Prof NET (19“)-Set)

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2.2 Installation
1. Connect the active antenna and the power adaptor/power
cable with the connectors at the device. If you are using EMC
Prof NET 19“, activate the device. EMC Prof NET (19“) is now
booting and shortly after ready for usage.
2. Connect EMC Prof NET (19“) with your network or via serial
interface with your pc.
2.3 Display
After power on the LC display shows the configuration and the
version of the firmware.
After a few seconds EMC Prof NET (19“) shows its IP address
followed by the up-to-date time and date.
First EMC Prof NET (19“) is in quarz mode. Beside the time
“Quarz” is shown in the display. Even in quarz mode EMC Prof
NET (19”) is completely ready for use.
EMC ProNET V1.6
Config: Gude
EMC ProNET V1.6
D192.168.0.2
15:39:53 Quarz
We 04.Jun 2008

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It looks for a proper radio signal. Approximatly after two minutes
EMC Prof NET (19“) has received enough information to switch
into the radio mode. Then it shows “F=...” in the display, which
means the number of faulty received bytes within in the last ten
minutes.
When you receive a good signal quality, the LED line will swing
fully once a second and the clock LED will blink every second.
The radio time LED will shine green constantly.
15:39:53 ok F=00
We 04.Jun 2008

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2.4 Alignment of the active antenna
Local issues may have influ-
ences on the received quality
of the signal. Barriers like re-
inforced concrete buildings or
mountains may weaken the sig-
nal, the electromagnetic fields of
screens or motors may disturb
the signal, too.
EMC Prof NET (19“) was de-
veloped in aspect to be used in
an electro-magnetic disturbed
environment. With its active an-
tenna and optimized electronic,
EMC Prof NET (19“) offers a
good receiving even in such
ambience.
To obtain a good receiving, please attend to the following hints:
 Do not place the antenna near by or directly on metallic,
or conductive objects.
 Place the antenna near by a window. If neccessary it
is possible to mount the antenna outsides, in this case
make sure, that there is an adequate lightning proctec-
tion.
 Do not place the antenna parallel to telephon/network or
power cables.
 Change the direction and the position of the antenna
until you get a good receive quality (See figure 5).
Since the time signal moves cir-
cular from the sender in frankfurt/
Mainflingen, you will get the best
receive if you place the antenna
tangential to these circles.
Figure 5 Alignment of the active
antenna

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 Interferences may be exactly at 77,5 kHz or broadband
interferences, which meet 77,5 kHz. Devices like moni-
tors or devices using a power adaptor are known jam-
ming sources. Do not place the antenna near by those
objects.
 Athmospheric interferences occur like shortwave radio
in batches, up to a few seconds. To secure the received
quality, we recommend to change the location of the
antenna.
When you receive a good signal quality, the LED line will swing
fully once a second and the clock LED will blink every second.
The radio time LED will shine green constantly.

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3.1 EMC Prof NET (19“) as SNTP-Server
Due to its integrated ethernet interface EMC Prof NET (19“) can
be connected to a network and is able to act as a stand alone
time server. The SNTP protocol allows client in the network to
synchronize the time with EMC Prof NET (19“).
3 Network operation
3.2 Time synchronization as SNTP-Server
The following chapters show how to synchronize your PC clock
with EMC Prof NET (19“) while using a MS Windows OS.
3.2.1 Windows XP/Vista
If you are using Windows XP or Vista, you do not need additional
software to synchronize your PC with EMC Prof NET (19“)
First, open the date and time information by double clicking on
the clock in the task bar. Now choose the tab Internet time and
enter the IP address of EMC Prof NET (19“) into the field Server
(see figure 6).
By clicking at Update
you can check the syn-
chronization.
Close the configuration
by clicking at OK. Win-
dows will automatically
synchronize the time
from now on.
Figure 6 Internet time at Windows XP

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3.2.2 Windows 9x/NT/2000
While using Windows 9x/NT/2000 the easiest way to synchro-
nize the internal PC clock with the EMC Prof NET (19“) is the
tool Dimension 4 (D4).
To synchronize the PC with EMC Prof NET (19“), click on the
button Add. Then enter the IP address of EMC Prof NET (19“)
at Server and a description at Location. Now choose the proto-
col „SNTP“. Confirm the settings by clicking at OK (see figure
7).
With standard settings, D4 will update your PC clock once an
hour.
Figure 7 Interface D4

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3.2.3 Linux
Under Linux, there are several ways to synchronize the PC
clock with a network time server. This chapter shows how you
can synchronize your PC clock with ntpdate and cron.
Please check, if ntpdate is installed already. Therefor, please
use the command „which ntpdate“. If ntpdate is installed, which
will display the location on your PC (Figure 8)
If which does not display a location, please install ntpdate (in-
cluded in NTP). You can find the script make_all.sh for instal-
lation at the CD-ROM at „EMC_Professional_NET\tools\linux\
get_ntp“. More information about the installation you can find in
chapter 4.2.
With „ntpdate IP address of EMC Prof NET (19“)“ you can syn-
chronize your PC clock. If you only want to request the time of
EMC Prof NET (19“), you have to use the paramter „-q“ after
the command.
linux:/ # which ntpdate
/usr/sbin/ntpdate
linux:/ #
Figure 8 ntpdate was found
linux:/ # ntpdate 192.168.0.2
9 Mar 10:26:44 ntpdate[4012]: step time server
192.168.0.2 offset -0.02398 sec
linux:/ # ntpdate -q 192.168.0.2
9 Mar 10:26:50 ntpdate[4013]: adjust timer server
192.168.0.2 offset -0.00145 sec
linux:/ #
Figure 9 ntpdate

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For a regularly synchronization, you have to create a cronjob. A
cronjob is command, done by cron. We recommend to start ntp-
date with the parameter „-s“. With „-s“ the command line output
of ntpdate will be written into the systemlog. To create a cronjob,
you have to start crontab -e. In figure 10 you can see a cronjob,
that is repeated each full hour.
Figure 10 crontab
#min hour day month dayofweek command
#---------------------------------------------------
0 * * * * ntpdate -s 192.168.0.2

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4 Operation via serial interface
EMC Prof NET (19“) offers a serial interface, additionally to
the network ethernet interface. On the CD-ROM, you can find
the tool w32EMC for Windows OS. For Linux you need the free
toolset NTP.
4.1 Operation under Windows
4.1.1 Installation of the Software
Put the CD-ROM „Drivers & Tools“ into your CD-ROM drive.
Open „setup_w32EMC.exe“ and follow the advices of the instal-
lation program. The neccessary files will be copied to your hard
disk.
Start w32EMC.exe. You only have to enter the used COM port.
If everything is alright, your system will be synchronized regu-
larly.
4.1.2 Settings
The menue settings allows to change the configuration of
w32EMC:
 COM-Port
Here you can enter the COM-Port where EMC Prof
NET (19“) is connected to.
 Colors
Here you can change the color
settings of w32EMC.
 Max. offset
Here you can activate the max-
imum allowed offset. If it is ac-
tive, the software calculates the
difference between last DCF
time and PC clock. In case it
is more than 90 minutest, the
software will not synchronize
Figure 11 w32EMC

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the PC. This feature is recommended in locations of
bad receive, since the DCF signal may have errors and
will look totally correct, although it is wrong.
 Language
Here you can change the language of w32EMC. Pos-
sible languages are English and German
 Sync frequency
Here you can choose in which intervall w32EMC shell
synchronize your PC clock. Usually one hour is enough,
shorter intervalls may cause a too high CPU load.
 Time shift
Here you can enter a time shift. We recommend to de-
activate this feature, since Windows has its own time
shift management.
 Save
Here you can save the changed settings. They will be-
come active on next start of w32EMC.

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4.1.3 Interface
At the w32EMC window (figure 11) you can see the following
values:
DCF77-State
System time
The time and date of your PC.
Last received
The last correct received DCF time and date.
Operation mode
It is indicated here if EMC Prof NET (19“) is in radio or in quarz
mode:
„Radio mode“ means, EMC Prof NET (19“) receives a proper
DCF77 signal and synchronizes with.
„Quarz mode“ means, EMC Prof NET (19“) works with its
integrated real time clock, since there is no proper receive of
DCF-77 time signals. If this happens often, please check the
alignment of the active antenna (see 2.4).
Incorrect bits
Here, the counter of the incorrect received bits is displayed.
EMC Prof NET (19“) switches automatically to Quarz mode,
if the number rises to high. When the received signal has gone
better and the number of faulty bits decreased, EMC Prof NET
(19“) switches back to Radio mode. The number of faulty bits is
displayed in the LCD display also: „F=...“.
Announcements
Announcements, broadcasted via DCF will be displayed here.

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V.24
V.24 State
The state of the data transfer of the serial interface is shown
here:
„active“/„active in ... seconds“: DCF time signals are re-
ceived at serial interface of the PC. The system time is
compared with DCF time.
„No receive!“: There is no receive of signals at the choos-
en serial interface. Please check if you choose the correct
COM-port and if the cable is connected correctly to your
PC.
„No COM-port selected“: There is no COM-port selected
to receive the signals of EMC Prof NET (19“).
Interface
The selected COM-port is displayed here.
Log
The recently received time telegram is displayed here as an
ASCII string.
4.1.4 Logmode
The software w32EMC allows you to protocol all actions and
additional error messages in a log file. This is important for ad-
ministration or bugfixing.
You can start the logmode at the start of the software. Sie kön-
nen den Logbetrieb beim Programmstart aktivieren. Therefore
you have to use the command line parameter „-l“. While starting
the program with the command line, simply enter the parameter
behind the start command („c:\programme\EMCprof>w32EMC
–l“). Another solution is to create a shortcut.
All information in logmode will be written to the file logfile.emc,
which is located in the program folder of w32EMC.

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4.2 Operation under Linux (NTP)
EMC Prof NET (19“) can be used with NTP under Linux. „NTP“
means Network Time Protocol. It is designed for the synchroni-
zation of clients over TCP/IP. For the usage under Linux the V.24
output protocol has to be changed to XNTP (see chapter 5.3).
4.2.1 NTP installation
For easy installation of NTP you can find the shell script make_
all.sh on the CD-ROM at „tools\linux\get_ntp“. This script down-
loads NTP from the internet and compiles it.
Copy the folder „get_ntp“ to your hard disk. Now start make_
all.sh with the command „-/make_all.sh“. After the successful
application, NTP is compiled and ready for use.
End the installation with „make install“.
4.2.2 NTP configuration
NTP interacts with EMC Prof NET (19“) via the symbolic link:
/dev/refclock-0. If EMC Prof NET (19“) is connected with
COM1 for example, /dev/refclock-0 has to link to /dev/ttyS0 (for
COM2: /dev/ttyS1).
If your Linux is based on Kernel 2.4 or older, you can create the
link with „ln -s /dev/ttyS0 /dev/refclock-0“.
Since Kernel 2.6 udev administrates the In-/output device files.
To create a link to refclock-0 automatically by udev, there has to
be a „rule“ for this link.
Change to the folder rules.d in the udev folder (e.g. /etc/udev/
rules.d) and open the file 50-udev.rules. Add the following line to
the file. where the serial ports are defined:
KERNEL==“ttyS0“, NAME=“%k“, SYMLINK=“refclock-%n“,
GROUP=“uucp“
Please restart udev after this process.
# serial devices
KERNEl==“ttyS0“, NAME=“%k“,
SYMLINK=“refclock-%n“, GROUP=“uucp“
KERNEL==“tty[A-Z]*“, NAME=“%k“, GROUP=“uucp“
KERNEL==“pppox*“, NAME=“%k“, GROUP=“uucp“
Figure 12 50-udev.rules file