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hopf 6875 Technical Description

Gps satellite controlled clock
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Technical Description
GPS Satellite Controlled Clock
6875
Version 04.00
16.07.2008

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  • Page 1 Technical Description GPS Satellite Controlled Clock 6875 Version 04.00 16.07.2008...
  • Page 2 Elektronik GmbH Nottebohmstr. 41 58511 Lüdenscheid Postfach 1847 58468 Lüdenscheid Tel.: ++49 (0)2351 / 9386-86 Fax: ++49 (0)2351 / 9386-93 Internet: http://www.hopf.com e-mail: info@hopf.com Page 2 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 3: Table Of Contents

    4.3.17.4 AFNOR NFS 87-500 4.3.18 Version / Reset 5 Data strings 5.1 General information on the serial data output of the 6875 board 5.2 Set-up of the standard (hopf6021) string 5.2.1 Status and day of the week nibble 5.2.2 Configuration for NTP (Network Time Protocol) 5.3 Data string: Standard (hopf6021) with year 2000...
  • Page 4 5.9.3 Example of a Transmitted Data String 6 Examples of connections 6.1 Assignment of the screw clips 6.1.1 Examples of connections for OC1-3 7 Dimensions of Snap-in Module Housing 8 Glossary und Abbreviations Page 4 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 5: General Information

    ENERAL INFORMATION 1 General information The 6875 radio-controlled clock is a universal GPS reception module with a highly accurate time reference developed for controlling industrial processes. The 6875 snap-in module for 35mm (DIN) track mounting is fitted with three PhotoMOS signal relays, an analogue and digital TTL output and up to four independent serial interfaces.

  • Page 6: Quick Installation

    It is not absolutely necessary to enter set-up values. However, without initialisation it may be several hours before the first signals are received. For quick installation it is necessary to set the following set-up values in the GPS 6875 satellite controlled clock: •...

  • Page 7: Hardware

    Digital output, TTL COM0 RS232 Receiving line (RxD0) Transmission line (TxD0) COM1 RS232 RS422 Transmission line TxD1 +TxD1 Transmission line -TxD1 Receiving line RxD1 -RxD1 Receiving line +RxD1 high active low active GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 7...

  • Page 8: Installation

    +Vin und -Vin on the connecting unit X1. The system is provided with a voltage of 18...72 VDC.. The internal voltage supply of the 6875 snap-in module is potential-free. It must be earthed on the rear side of the housing via the screw as labelled, in order to compensate the potential dif- ference between the ground potential of the housing and the earth.

  • Page 9: Technical Data

    DCF77 simulation output output at BNC (IRIG-B / DCF77-Out) accuracy same as internal PPS pulse carrier signal frequency 77.5 kHz ± 25 ppm signal level 3...5 mV at 50 Ohm GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 9...
  • Page 10 30 min. - 4 hrs. installation without definition of position) Accuracy ± 300 nsec Temperature range 0...+ 60 °C Additional components: see GPS accessories Please Note: SUBJECT TO ERRORS AND TECHNICAL MODIFICATIONS Page 10 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 11: Software

    4 Software 4.1 System requirements The hopf 6875 configuration software is for configuration of a hopf 6875 radio-controlled clock via a serial interface. The serial interface cable included is connected between the computer (at the free serial interface) and the radio-controlled clock (COM0).

  • Page 12: Installation Of The Remote Software

    UninstallerData (e.g. /opt/Hopf/6875/UninstallerData/Uninstall6875). 4.2.2 Start programme Windows After installation has been completed in the chosen directory (e.g. C:\rogramme\Hopf\6875) the configuration software can be started by selecting the appropriate link (e.g. Start Programme Hopf Hopf 6875).

  • Page 13: Trouble Shooting

    If there are any questions or installation problems please contact the support team at Ruprecht & Partner OEG under the e-mail address: support-hopf@rdcs.at Updated versions can be found on the website of Ruprecht & Partner OEG: http://www.rdcs.at/ GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 13...

  • Page 14: Functions Of The Configuration Software

    The hopf 6875 configuration software is for convenient configuration of a hopf radio-controlled clock 6875 via an RS232 interface. All the parameters of the radio-controlled clock can be dis- played or set via a graphic user interface. These are divided into categories (e.g. time zone, changeover time, serial parameters, etc.).

  • Page 15: Information

    This section makes it possible to save a complete configuration of a radio-controlled clock in a configuration file (text file) or to load down from a configuration file and transmit to the radio- controlled clock. GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 15...
  • Page 16 The dialogue can be ended by selecting the button “CLOSE”: The button "HELP" is for activating online help – this contains all the information contained in this document and additional general information about GPS. Page 16 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 17: Date & Time

    “Time Zone“ (4.3.7). Status Timeout: Shows the time delay in minutes until the resetting of the radio-controlled bit in the time status. This value can be between 2 and 255 minutes. GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 17...

  • Page 18: Time Zone

    Hour, minute and the information as to whether the location is west or east of the 0 meridian (Greenwich). The configuration software checks the plausibility of the values entered. Example: West (-) 08:00 USA and Canada (Pacific Time) East (+) 01:00 Germany Page 18 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 19: Changeover Time/Changeover Point

    To set the changeover times the following information is required: • first, second, third, fourth or last day of the week in the month • day of the week • month • time in hours and minutes GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 19...

  • Page 20: Position

    For accelerated synchronization the GPS radio-controlled clock requires only the entry of the approximate location. For the exact position shown in the above example the following entry would suffice: North 50°00,0000 East 007°00,0000 Page 20 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 21: Satellites

    In many cases it is possible to mount the antenna indoors near the window (short cable lengths, no lightning protection). If, in this mode, 4 satellites are available the evaluation jumps automatically to GPS reception mode 3D and calculates the exact position. GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 21...

  • Page 22: System Byte

    OFTWARE 4.3.11 System Byte This section permits the configuration of additional internal system functions. These are acti- vated and deactivated by the setting and resetting of a bit. Page 22 GPS Satellite Controlled Clock 6875 - Ver. 04.00...
  • Page 23 (based on the fluctuant environmental conditions, like e.g. temperature) will be locked or rather disconnected, if the GPS synchronisation fails. GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 23...

  • Page 24: Serial Parameters

    PRESSS FOR AT LEAST SECONDS ON THE FRONT PANEL OF THE CLOCK THE SERIAL PARAMETERS OF THE CLOCK ARE SET TO <9600 B >. DATA BITS STOP BIT NO PARITY Page 24 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 25: Mode Bytes

    “C01 C ” “C16 C “ HE ENTRIES USTOM TRING USTOM TRING IN THE SELEC- “ “ TION TRANSMISSION STRING ARE RESERVED FOR SPECIAL SOLUTIONS AND NOR- MALLY HAVE NO FUNCTION GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 25...
  • Page 26 Each second Each minute Each hour On request Second forerun Output of the data string with 1 second forerun: no, yes CR / LF Sequence for CR and LF: CR->LF, LF->CR Page 26 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 27: Optical Coupler

    DCF77radio-controlled clocks with DCF77 pulse in- put such as hopf 6850. If desired this signal can be inverted. The settings for the DCF77 pulse are in the DCF77 menu and apply to all outputs emitting this.
  • Page 28 Configuration for an inverted output of the pulses IMP 1 and IMP 2 takes place in the section “Outputs“ in 4.3.15. The settings for the individual PhotoMos signal relays are each transmitted individually to the radio-controlled clock. Page 28 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 29: Outputs

    Output signal: data string, IMP1 (pulse1), IMP2 (pulse2), IRIG-B pulse • The output signals can also be emitted inversely. Please Note: IMP1 ( IMP2 ( “ HE CONFIGURATION OF PULSE PULSE IS IN THE OPTICAL “ COUPLER MENU GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 29...

  • Page 30: Dcf77 Simulation

    The value "DCF77 timeout after" indicates the delay time in minutes for the output of the DCF77 simulation or the DCF77 pulse when changing to quartz mode. If this value is set at 255 the DCF77 simulation and/or DCF77 pulse will be emitted permanently. Page 30 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 31: Irig-B / Irig Time Code

    With regard to a reception failure of the sync. source (here GPS) the turning off of the IRIG-B signal is delayed by the adjusted figure. The value can be set between 002 and 255 minutes. GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 31...

  • Page 32: Irig Time Code Structure And Timing-Diagram

    17 bits for the binary value of the current seconds of day 100 bit frames can be transmitted in one second. Unused bit frames are filled with a logical zero. Page 32 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 33: Format Categories Irig-Bxxx According To Irig Standard 200-04

    The AFNOR NFS 87-500 Code is similar to the IRIG Time Code Standard. It has been laid down by the French institute for standards and is based on the IRIG Standard 200-4. The IRIG-B Standard 200-89 is contained as subset in the AFNOR NFS 87-500. GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 33...

  • Page 34: Version / Reset

    Please Note: HEN CHANGES HAVE BEEN MADE ON THE RADIO CONTROLLED CLOCK IT IS AD- VISABLE TO WAIT FOR THE MINUTE CHANGE BEFORE SETTING UP RESET Page 34 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 35: Data Strings

    On all data strings the output of control character CR and LF can be exchanged with mode- byte. The transmitted data string are compatible with the data strings of the following hopf clocks: • Board 6020/6021 standard with control character •...

  • Page 36: Status And Day Of The Week Nibble

    Source code and documentation are available as freeware in the Internet under the following address: http://www.ntp.org http://www.eecis.udel.edu/~ntp/ NTP supports the hopf protocol as described in section 5.2. The following settings are required in the clock board: Transmission parameters: 9600 Baud, 8 data bits, no parity, 1 stop bit...

  • Page 37: Data String: Standard (Hopf6021) With Year 2000

    LF (Line Feed) CR (Carriage Return) ETX (End of Text) GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 37...

  • Page 38: Status And Day Of The Week Nibble

    Thursday Friday Saturday Sunday Example: (STX)E312345603011996(LF)(CR)(ETX) Radio-controlled mode (high accuracy), daylight saving time, no announcement It is Wednesday 03.01.1996 - 12:34:56 hrs. ( ) – ASCII control characters e.g. (STX) Page 38 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 39: Data String Sinec H1

    ";" semi-colon "#" or space $23 / $20 "*" or space $2A / $20 "S" or space $53 / $20 "!" or space $21 / $20 ETX (end of text) GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 39...

  • Page 40: Status In Data String Sinec H1

    ST/DST or DST/ST space no announcement Example: (STX)D:03.01.96;T:1;U:12.34.56; _ _ _ _ (ETX) ( _ ) = Space Radio-controlled mode, no announcement, standard time It is Wednesday 03.01.96 - 12:34:56 hrs. Page 40 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 41: Data String T-String

    $30-35 unit minutes $30-39 ":" colon tens seconds $30-36 unit seconds $30-39 CR (carriage return) LF (line feed) Example: T:96:01:03:03:12:34:56(CR)(LF) It is Wednesday 03.01.96 - 12:34:56 hrs. GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 41...

  • Page 42: Data String Master/Slave

    + symbol $30,$31,$38,$39 time diff. Unit hrs. $30-39 time diff. 10 minutes $30-35 time diff. Unit minutes $30-39 LF (line feed) CR (carriage return) ETX (end of text) Page 42 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 43: Status In Data String Master/Slave

    It is Wednesday 03.01.96 - 12:34:56 hrs. The time difference to UTC is + 2.30 hrs. 5.6.2 Setting To synchronize the hopf slave systems the following settings are required: • Output every minute • Output second forerun • ETX at the second change •...

  • Page 44: Gps2000 Data String

    Error greater than 1 µsec space Error greater than 1 µsec Example: (SOH)042:12:34:56*(CR)(LF) It is day of the year 42, 12:34:56 hrs., the system time inaccuracy is greater than 10 µsec. Page 44 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 45: Configuration For Gps2000 Data String

    In addition the output of a second pulse is required at the 2nd RS232 serial interface. The pulse width is 10 msec. The falling edge is synchronized to the second mark. The pulse must be configured separately (e.g. in 6875: IMP1 as cyclical output every second, pulse length 10 msec; emit IMP1 to COM1 as RS232).

  • Page 46: Data String Sat 1703 Time String

    $30-39 "/" day of the week $31-37 "/" tens hour $30-32 unit hour $30-39 ":" tens minute $30-35 unit minute $30-39 ":" tens second $30-35 unit second $30-39 Page 46 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 47: Data String Example

    CR (carriage return) LF (line feed) 5.8.3 Data String Example (STX )18.07.02/4/02:34:45UTC_ _( CR)(LF)(ETX) • It is Thursday 18.07.2002 - 02:34:45 o'clock UTC • The clock is synchronised with GPS GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 47...

  • Page 48: Sinec H1 Extended

    $23 / $20 "*" or space $2A / $20 "S", "U" or space $53 / $55 / $20 "!", "A" or space $21 / $41 / $20 ETX (end of text) Page 48 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

  • Page 49: Status

    5.9.3 Example of a Transmitted Data String (STX)D:03.01.96;T:3;U:12.34.56; _ _ _ _ (ETX) ( _) = Space radio operation, no announcement, standard time It is Wednesday 03.01.96 - 12:34:56 h GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 49...

  • Page 50: Examples Of Connections

    XAMPLES OF CONNECTIONS 6 Examples of connections 6.1 Assignment of the screw clips 6.1.1 Examples of connections for OC1-3 Active, positive pulse Page 50 GPS Satellite Controlled Clock 6875 - Ver. 04.00...
  • Page 51 XAMPLES OF CONNECTIONS Active, negative pulse Passive, positive pulse GPS Satellite Controlled Clock 6875 - Ver. 04.00 Page 51...

  • Page 52: Dimensions Of Snap-In Module Housing

    Daylight Saving Time - summertime IRIG-B Inter-Range Instrumentation Group B AFNOR L’Association Française de Normalisation - Französische Gesell- schaft für Normung (French Standards Association) IEEE Institute of Electrical and Electronics Engineers Fiber Optic Link Page 52 GPS Satellite Controlled Clock 6875 - Ver. 04.00...

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