hopf 7001RC User manual

_____________________________________________________________
Technical Manual
System 7001RC
Multi-Source Function
ENGLISH
Version: 02.01 - 29.11.2006
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Valid for Control Board 7020RC with FIRMWARE Version: 01.00
and REMOTE-SOFTWARE Version: 00.00
Industriefunkuhren

2 / 31 Multi-Source Function System 7001RC - V02.01
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]

INPORTANT NOTES
Multi-Source Function System 7001RC - V02.01 3 / 31
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
Version number (Firmware / Description)
REGARDING VALIDITY OF THIS MANUAL PLEASE SEE TECHNICAL MANUAL OF SYSTEM
7001RC (SEE CHAPTER MULTI-SOURCE SYSTEMS).
Downloading Technical Descriptions
All current descriptions of our products are available free of charge via our homepage on the
Internet.
Homepage: http://www.hopf.com
E-Mail: [email protected]
Symbols and Characters
Operational Reliability
Disregard may cause damages to persons or material.
Functionality
Disregard may impact function of system/device.
Information
Notes and Information.

SERVICE RELIABILITY
4 / 31 Multi-Source Function System 7001RC - V02.01
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
Safety regulations
The safety regulations and technical data serve to ensure trouble-free
operation of the devices and protection of persons and equipment. It is
therefore of utmost importance to observe and comply with these
regulations. If these are not complied with, then no claims may be made
under the terms of the warranty and no liability will be assumed for any
ensuing damage.
Safety of the device
This device has been manufactured in accordance with the latest
technological standards and approved safety regulations
The device should only be put into operation by trained and qualified staff.
Care must be taken that all cable connections are laid and fixed in position
correctly. The device should only be operated with the voltage supply
indicated on the identification label.
The device should only be operated by qualified staff or employees who
have received specific instruction.
If a device must be opened for repair, this should only be carried out by
employees with appropriate qualifications or by hopf Elektronik GmbH.
Before a device is opened or a fuse is changed all power supplies must be
disconnected.
If there are reasons to believe that the operational safety can no longer be
guaranteed the device must be taken out of service and labelled
accordingly. The safety may be impaired when the device does not operate
properly or if it is obviously damaged. Contact your local
hopf Elektronik GmbH representative for required action.
CE-Konformität
This device fulfils the requirements of the EU directive 89/336/EWG
"Electromagnetic compatibility" and 73/23/EWG "Low voltage
equipment".
Therefore the device bears the CE identification marking
(CE=Communauté Européenne)
CE = Communautes Europeénnes = European communities
The CE indicates to the controlling bodies that the product complies with the requirements of
the EU directive - especially with regard to protection of health and safety for the operator
and the user - and may be released for sale within the common markets.

TABLE OF CONTENTS
Multi-Source Function System 7001RC - V02.01 5 / 31
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
Contents Page
1Multi-Source System - General...................................................................................... 7
1.1 Functional Schematic of a Multi-Source System......................................................... 7
1.2 Fundamental Problems of Multi-Source Systems ....................................................... 8
1.2.1 Status Information as a Component of Time Transfer......................................................... 8
1.2.2 Time Zone / Time Difference to UTC ................................................................................... 8
1.2.3 Summertime/Wintertime Changeover (ST/WT changeover) ............................................... 8
1.2.4 Leap Second ........................................................................................................................ 9
1.2.5 Automatic / Manual Changeover between the Sync. Sources ............................................ 9
1.2.6 Time Leaps when switching between two Sync. Sources ................................................... 9
1.2.7 Unification of the different Time Information ........................................................................ 9
1.3 Difference from a Safety System .............................................................................. 10
2Multi-Source System based on System 7001RC ....................................................... 11
2.1 Principle of the hopf 7001RC Multi-Source System ................................................ 11
2.1.1 Differentiation between Sync. Source Status and System Status ..................................... 12
2.1.2 Differentiation between Primary and Secondary Source ................................................... 12
2.1.3 System Behaviour on Automatic Source Changeover....................................................... 13
2.1.4 Example of System Behaviour on Changing Status of the Sync. Sources........................ 13
2.2 Display of the Synchronisation Status in the 7001RC System Display..................... 15
2.3 Configuration of the Multi-Source System................................................................. 16
2.3.1 Automatic / Manual Source Changeover ........................................................................... 16
2.3.1.1 Status Table for Automatic Source Changeover......................................................................... 17
2.3.2 Adjustable Multi-Source Modes ......................................................................................... 18
2.3.2.1 Multi-Source with GPS (Channel 1) and Master/Slave-String (Channel 3) ................................. 18
2.3.2.2 Multi-Source with DCF77 Pulse (Channel 2) and Master/Slave-String (Channel 3) ................... 18
2.3.3 Delayed Changeover between Primary and Secondary Source ....................................... 19
2.3.4 System Behaviour on Summertime/Wintertime Changeover ............................................ 19
2.3.5 Configuration of the Master/Slave-String Time Base......................................................... 20
2.3.5.1 Local Time as the Time Base in the Master/Slave-String (Standard) ......................................... 20
2.3.5.2 UTC as the Time Base in the Master/Slave-String ..................................................................... 20
2.4 Synchronisation Signal Requirements ...................................................................... 21
2.5 Sync. Source Requirements ..................................................................................... 21
2.6 Special Features in the System Behaviour ............................................................... 22
2.6.1 System Behaviour on Sync. Source Changeover.............................................................. 22
2.6.2 Behaviour on ST/WT Changeover ..................................................................................... 22
2.7 Connection of the Synchronisation Channels ........................................................... 23
2.7.1 GPS - Channel 1 ................................................................................................................ 23
2.7.2 DCF77 Pulse - Channel 2 .................................................................................................. 23
2.7.3 Master/Slave-String - Channel 3........................................................................................ 24
2.8 Synchronisation Process........................................................................................... 24
2.8.1 Synchronisation via GPS (Channel 1) ............................................................................... 24
2.8.2 Synchronisation via DCF77 Pulse (Channel 2) ................................................................. 25
2.8.3 Synchronisation via Master/Slave-String (Channel 3) ....................................................... 25
2.9 Error Messages......................................................................................................... 26

TABLE OF CONTENTS
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hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
3Appendix ....................................................................................................................... 27
3.1 Data String Master/Slave .......................................................................................... 27
3.1.1 Local Time as Time Base in Master/Slave-String (Standard)............................................ 27
3.1.2 UTC as Time Base in Master/Slave-String ........................................................................ 27
3.1.3 Structure of the Master/Slave-String.................................................................................. 27
3.1.4 Status in the Master/Slave-String ...................................................................................... 28
3.1.5 Example of a Transmitted Master/Slave-String ................................................................. 29
3.1.6 Settings .............................................................................................................................. 29
3.2 DCF77 Signal............................................................................................................ 30
3.2.1 Structure of the Data String DCF77 Signal........................................................................ 30
3.2.2 DCF77 Pulse (1Hz) ............................................................................................................ 31
3.2.3 Fault Mode ......................................................................................................................... 31

MULTI-SOURCE SYSTEM - GENERAL
Multi-Source Function System 7001RC - V02.01 7 / 31
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
1 Multi-Source System - General
A multi-source system makes it possible to create a clock system that can select between
various synchronisation sources (sync. sources), independent of their respective status. For
this purpose, all available sync. sources are evaluated and monitored.
Different priorities are assigned by the user to the various sync. sources (primary, secondary
etc.). These priorities define the synchronisation source that will be preferred when sources
have the same status.
The system will be synchronised and controlled by the primary source for as long as this
source has the status "Sync". In the event that the primary source reverts to "Quartz" or
"Invalid" status, the system automatically switches for synchronisation to the secondary
source – provided that this source has the synchronisation status "Sync".
The systems that are connected to the clock system are not able to recognise which source
is being used for synchronisation. These systems are only able to recognise, from the type of
signal emitted by the clock system, whether the clock system is synchronised or is running in
internal quartz mode.
The internal quartz mode of the clock system is only used as the time base when there is no
synchronisation source (sync. source) with "Sync" status available. In this case the clock
system status is output as "Quartz".
Switching between the various sync. sources generally takes place automatically but can
also be done manually.
1.1 Functional Schematic of a Multi-Source System
Different priorities are assigned to the sources Q1 ... Qx (primary, secondary etc.). The
system time and date are defined from the time and status information of the primary source.
In addition, the time and status information of the other sources is evaluated and monitored;
however this data is not used to synchronise the system. The synchronisation status of the
respective source is reported via the system such that, in the event of the failure of the
primary source, the user or the system can switch over to the next synchronous source.
Diagram: Schematic of a multi-source system
Q1 QxQ2
Evaluation: Time
Status
Source switchover
Error message Current
source
Clock time Control of internal
q
uartz base
Additional information
Source type
Source time base
• Local time, UTC, ...
• ST/WT changeover
• Switch second
Output
Source priority

MULTI-SOURCE SYSTEM - GENERAL
8 / 31 Multi-Source Function System 7001RC - V02.01
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
1.2 Fundamental Problems of Multi-Source Systems
Multi-source systems have more than one sync. source. Each of these sources is evaluated
and monitored in its own right. In this situation it is necessary to be aware of the problem that
the various time transfer formats may contain different information about the signal status,
time difference to UTC etc.
Due to the differences in time transfer formats several points should be noted when feeding
information into a multi-source system:
1.2.1 Status Information as a Component of Time Transfer
There are transfer formats where, for purposes of differentiation of signal quality, the only
difference is whether the signal can be evaluated or not.
An example of this is the GPS signal – this is either received and evaluated correctly,
thereby representing a valid sync. source, or the signal cannot be evaluated and the source
is classified as invalid.
1.2.2 Time Zone / Time Difference to UTC
A time zone is a section of the earth’s surface across which a common time applies. This
runs ideally from the poles along the lines of longitude. The time zone is defined by the time
difference between local time and UTC (Coordinated Universal Time).
The time base is defined from:
• The time zone: time difference from local time to UTC
• and the hour offset due to Summer/Wintertime changeover
1.2.3 Summertime/Wintertime Changeover (ST/WT changeover)
In the summer months many countries change to another time zone. In this way, Central
European Time (CET) applies in most middle European countries in winter (UTC+1h);
however in the summer months Central European Summer Time (CEST) applies (UTC+2h).
There are time transfer formats that carry out a ST/WT changeover with or without an
announcement.
In the case of a ST/WT changeover without an announcement the time leaps by one hour,
without the receiver being able to prepare for this. Since the time output is always prepared
in advance, other sub-systems that are synchronised by the receiver cannot accept the
ST/WT changeover and therefore continue to operate with an incorrect time until the next
time transfer.
For this reason these times must be known to the receiver when there are time transfer
formats that transmit the ST/WT changeover times without an announcement or do not carry
out any ST/WT changeover at all. Only in this way is it possible for the clock system to
output the correct local time.
Basically there are three possible signal combinations for handling ST/WT:
1. The signal sends an announcement prior to changeover (e.g. DCF77)
2. The signal changes over without an announcement (e.g. IRIG-B)
3. The signal ignores the changeover and continues without a leap (e.g. GPS)

MULTI-SOURCE SYSTEM - GENERAL
Multi-Source Function System 7001RC - V02.01 9 / 31
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
1.2.4 Leap Second
There are time transfer formats that carry out a leap second changeover with or without an
announcement.
In the case of a leap second changeover without an announcement the time leaps by one
second, without the receiver being able to prepare for this. Since the time output is always
prepared in advance, other sub-systems that are synchronised by the receiver cannot accept
the leap second changeover and therefore continue to operate with an incorrect time until
the next time transfer.
1.2.5 Automatic / Manual Changeover between the Sync. Sources
• Multi-source with automatic changeover between the sync. sources:
The system automatically selects the sync. source, depending on the
synchronisation status of the sync. source and the system status.
• Multi-source with manual changeover between the sync. sources:
The user can decide which sync. source should be selected to synchronise the
system. In the event of failure of this sync. source there is no automatic switchover
to the second sync. source.
1.2.6 Time Leaps when switching between two Sync. Sources
Sync. sources may have leaps in time due to, for example
• different signal runtimes,
• different time base accuracies
• configuration errors
• time differences or
• different time offsets to UTC etc.
Since each sync. source is evaluated in its own right and its time is accepted as valid,
provided that the time signal meets the formal conditions for synchronisation of the
respective channel, there may result a time leap in the multi-source system when switching
between sync. sources.
1.2.7 Unification of the different Time Information
There are various time transfer formats that must be known to the receiver system in order
for it to be able to calculate the correct time base.
For example:
• GPS always transmits in UTC
• IRIG-B transmits local time as standard but can also transmit in UTC

MULTI-SOURCE SYSTEM - GENERAL
10 / 31 Multi-Source Function System 7001RC - V02.01
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
1.3 Difference from a Safety System
At least two independent synchronisation sources (sync. sources) are required for
synchronisation in a safety system. The time information of the available sources is
compared and is only used to synchronise the system if a defined time difference between
the time data is not exceeded.
If the permissible difference is exceeded then the time is not accepted into the clock system
and an error message is output.
In a multi-source system, only one sync. source is used to synchronise the clock system.
The selection of the time source that is used for this purpose depends on the priority of the
respective source and its status.
The received time information in the multi-source system is not checked for
consistency.