hopf 7001RC User manual

_____________________________________________________________
Technical Manual
System 7001RC
Multi-Source Function
ENGLISH
Version: 02.01 - 29.11.2006
_____________________________________________________________
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
6 / 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]
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.

MULTI-SOURCE SYSTEM BASED ON SYSTEM 7001RC
Multi-Source Function System 7001RC - V02.01 11 / 31
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
2 Multi-Source System based on System 7001RC
The sync. sources are selected via the "SYNCHRONISATION SETTINGS BYTE" in the
"INITIAL-SETUP" of the 7001RC system.
2.1 Principle of the hopf 7001RC Multi-Source System
The 7020RC control board of the 7001RC system has three synchronisation inputs
(channels) for connecting the sync. sources.
Each of these channels can evaluate a specific type of time information.
The 3 channels can be combined in 2 modes as a multiple source with 2 sync. sources:
GPS (Channel 1) and Master/Slave-String (Channel 3)
DCF77 pulse (Channel 2) and Master/Slave-String (Channel 3)
The following schematic presents an overview of all the synchronisation channel formats
available on the 7020RC control board and the associated information flow:
• Control of switchover (manual or automatic) between sync. channels 1, 2 and 3
• When the channel is changed the system re-synchronises to the selected
channel, beginning with the system reception status "Quartz“ ("C").
• The control of the internal quartz base is taken over by the selected primary
source.
• Configuration of the sources and channels
•
System clock synchronisation
• Control of the system-internal quartz base
• Possible error message
• Status of the connected sync. channels
Channel 1
GPS
Time base
• UTC
ST/WT changeover
• system internal
Leap second
• from GPS
Channel 2
DCF77 pulse
Time base
• Local time
ST/WT changeover
• from DCF77 pulse
• (special system internal)
Leap second
•
from DCF77
p
ulse
Channel 3
Master/Slave-String
Time base
• Local time
• (special UTC)
ST/WT changeover
• from Master/Slave-String
• (special system internal)
Leap second
•
from Master/Slave-Strin
g
Generation for this channel:
• Independent clock
• Independent millisecond
• Error message
Evaluation:
• Status + Reception
Generation for this channel:
• Independent clock
• Independent millisecond
• Error message
Evaluation:
• Status + Reception
Generation for this channel:
• Independent clock
• Independent millisecond
• Error message
Evaluation:
• Status + Reception

MULTI-SOURCE SYSTEM BASED ON SYSTEM 7001RC
12 / 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]
hopf Elektronik GmbH has various modules in the range for converting time
information in order to produce the signals for channel 2 (DCF77 pulse) and
channel 3 (serial Master/Slave-String). For example, to convert an IRIG-B
signal into a serial Master/Slave-String that can be evaluated by the system
7001RC. This makes it possible for customers also to be able to use other
time signals to synchronise the multi-source system.
2.1.1 Differentiation between Sync. Source Status and System Status
There is a fundamental difference between the system status and the respective status of
the sync. sources:
Sync. source status
• refers to the synchronisation status of the connected time sources, (not to the
synchronisation status of the multi-source system)
• is displayed alternately on the upper line of the 7001RC system display for each
sync. source
• can accept the conditions "-" (invalid) and "R" (radio synchronous with control of
the internal quartz base)
• independently for each source
System status
• represents the synchronisation status of the clock system
• is displayed on the lower line of the 7001RC system display, followed by the
indication of accuracy
• can accept the conditions "-" (invalid), "C" (quartz), "r" (radio synchronous without
control of the internal quartz base) and "R" (radio synchronous with control of the
internal quartz base)
• depends on the synchronisation status of the selected primary source and the set
delay time (sync. time OFF) for a change of status
2.1.2 Differentiation between Primary and Secondary Source
The primary source is the source with which the clock system synchronises by preference
and which controls the system’s internal quartz base provided that this has the status
"Sync".
In the event that the signal to the primary source fails and the secondary source has the
status "Sync" at this time, synchronisation and control of the internal quartz base switches to
the secondary source.

MULTI-SOURCE SYSTEM BASED ON SYSTEM 7001RC
Multi-Source Function System 7001RC - V02.01 13 / 31
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
2.1.3 System Behaviour on Automatic Source Changeover
Primary
Source
Status
Secondary
Source Status System Condition
synchronous synchronous System is synchronised by the primary source.
synchronous not synchronous System is synchronised by the primary source.
not
synchronous
synchronous System is synchronised by the secondary source.
not
synchronous
not synchronous System is not synchronised and runs in internal
quartz base mode
The sync. source leaps to the primary source
2.1.4 Example of System Behaviour on Changing Status of the Sync.
Sources
Status System
No. Actions on the
system Prim.
source
Sec.
source
System
Status
Selected
sync. source
Time base of
system time
Comments
1 Switch on - - - Primary
source
Internal
quartz base
System was without power for 3
days; System operates with system
quartz time; All time and date
information begin with zeros in all
positions
2 Manual setting of a
valid time / date - - C Primary source
Internal
quartz base
System operates with valid time
The set time is continued with the
internal quartz base
3
Primary source
connection with
valid time
information
(synchronous)
R - C Primary
source
Internal
quartz base
Primary source is synchronised
(duration: approx. 3-5 min.)
4 R - r Primary
source
Primary
source
System starts with synchronisation
to the primary source (duration:
approx. 2-3 min.)
Time leap possible on
synchronisation
5 R - R Primary
source
Primary
source
After one minute system status
goes to synchronisation with control
of the internal quartz base
6
Secondary source
connection with
valid time
information
(primary source
continues
synchronous)
R R R Primary
source
Primary
source
Secondary source is synchronised
(duration: approx. 3-5 min.)
7
Primary source
failure
(secondary source
continues
synchronous)
- R R Primary
source
Internal
quartz base
Primary source failure detection;
System status is maintained in
"sync." by means of "sync. status
change after sync fail” timer.
System operates with internal
quartz base

MULTI-SOURCE SYSTEM BASED ON SYSTEM 7001RC
14 / 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]
8 - R r Primary
source
Internal
quartz base
"Sync. status change after sync. fail"
timer expired
Loss of synchronisation via small "r"
system status
System operates with internal
quartz base
9 - R C
Secondary
source
Internal
quartz base
Change to secondary source
System operates with internal
quartz base
10 - R r
Secondary
source
Secondary
source
System synchronises to secondary
source
Time leap possible -
in the event of a difference in the
sync. source times.
11 - R R
Secondary
source
Secondary
source
After one minute system status
goes to synchronisation with control
of the internal quartz base
12 Secondary source
failure - - R Secondary source
Internal
quartz base
Detection of a fault in reception from
the secondary source
System status is maintained as
radio synchronous by means of
"sync. status change after sync. fail”
timer.
13 - - r Secondary
source
Internal
quartz base
"Sync. status change after sync. fail"
timer expired
Loss of synchronisation via small "r"
system status
System operates with internal
quartz base
14 - - C Primary
source
Internal
quartz base
No synchronisation, change to
primary source
System operates with internal
quartz base
15
Secondary source
refreshed with valid
information - R C
Secondary
source
Internal
quartz base
Secondary source is synchronised
(duration: approx. 3-5 min.)
System operates with internal
quartz base
16 - R r
Secondary
source
Secondary
source
System synchronises to secondary
source
Time leap possible
(only on long operation with the
internal quartz base)
17 - R R
Secondary
source
Secondary
source
After one minute system status
goes to synchronisation with control
of the internal quartz base
18
Primary source
refreshed with valid
time information
(secondary source
continues
synchronous)
R R C Primary
source
Internal
quartz base
Primary source is synchronised
(duration: approx. 3-5 min.)
System status leaps to Quartz "C"
System operates with internal
quartz base
19 R R r Primary
source
Primary
source
System synchronises to primary
source; Time leap possible -
in the event of a difference in the
sync. source times.
20 R R R Primary
source
Primary
source
After one minute system status
goes to synchronisation with control
of the internal quartz base

MULTI-SOURCE SYSTEM BASED ON SYSTEM 7001RC
Multi-Source Function System 7001RC - V02.01 15 / 31
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
2.2 Display of the Synchronisation Status in the 7001RC System
Display
The following information about the system status can be taken from the system display:
• Display of the selected primary and secondary sources
• Synchronisation status of the primary and secondary sources
• Synchronisation status of the 7001RC system
• Error messages
The possible displays for the sync. sources and their synchronisation status are made up of
6 characters:
>GPS_R >GPS_- Channel 1, GPS
>DCF_R >DCF_- Channel; 2, DCF77 pulse
>SER_R >SER_- Channel 3, Master/Slave-String
The position of these characters in the display is highlighted in white in the following picture:
L T : 0 3 : 4 5 : 4 8 T U 2 3 / F E B / 2 0 0 3 S - - > G P S _ R E
U T : 0 2 : 4 5 : 4 8 T U 2 3 / F E B / 2 0 0 3 R - : - E - - - K
The display switches every 5 seconds between the displays of the two sync. sources.
The meaning of the individual characters is as follows:
Character
No. Description Character Meaning
">" System-synchronising source
Character 1 Sync. source (channel)
" " Second sync. source
"GPS" GPS source (channel 1)
"DCF" DCF77 pulse source (channel 2)
Characters
2-4 Sources (channel)
"SER" Serial string source (channel 3)
Character 5 Variable "_" Variable, no further function
"–"
The source (channel) is not
connected at present or cannot be
evaluated and is not available for
synchronisation
Character 6 Source status
"R"
Source successfully evaluated and
can be used to synchronise the
system

MULTI-SOURCE SYSTEM BASED ON SYSTEM 7001RC
16 / 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]
2.3 Configuration of the Multi-Source System
The system must be configured correctly in order to ensure the uniformity of the different
time information from the sync. sources and to make the special multi-source settings.
2.3.1 Automatic / Manual Source Changeover
The source changeover takes place automatically as standard (factory setting). If not
required, this automatic changeover can be prevented, using Bit 3 of the ‘Control Bytes’
function. This may be necessary if, for example, it is known to the user that the time
information supplied by the secondary source is erroneous and cannot therefore be used.
Function Control Byte
Bit 3 System Behaviour
0 Automatic changeover
between primary and secondary source
1
Manual changeover
between primary and secondary source by inputting the
synchronisation setting byte
The clock system status is always set to "C" (quartz) after every source
changeover - automatic or manual – so that it then synchronises to the
new source.

MULTI-SOURCE SYSTEM BASED ON SYSTEM 7001RC
Multi-Source Function System 7001RC - V02.01 17 / 31
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
2.3.1.1 Status Table for Automatic Source Changeover
The following table shows the sync. source that is automatically selected for changeover,
together with its respective status.
Changeover takes place dependent on:
• The primary and secondary sources selected
• The reception status of the respective sync. source
• The timer for loss of synchronisation of the system status
Primary
Source
Status
Secondary
Source
Status
System
status
"Sync. Status change
after sync. fail" Timer
System switches or
remains on
- -
C / - -- Primary source
- -
R / r running Remains on last sync.
source with system quartz
time until timer expires
R - - / C / r / R -- Synchronised with primary
source
R R - / C / r / R -- always synchronised with
primary source
- R R / r running Remains on primary source
until timer expires
- R
- / C / r / R -- Synchronised with
secondary source
Source Status
-
The source (channel) is not currently
connected or cannot be evaluated and is
not available for synchronisation.
R Source is successfully evaluated and can
be used to synchronise the system.
System Status
- System does not have a valid time
C • System has a valid time.
• System runs with quartz time.
r
• System synchronised at this
moment
or
• System loses synchronisation at
this moment
R
• System is synchronised and the
internal quartz base is controlled.
or
• “Sync. Status change after sync.
fail” timer is active after
synchronisation.

MULTI-SOURCE SYSTEM BASED ON SYSTEM 7001RC
18 / 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]
2.3.2 Adjustable Multi-Source Modes
The sync. sources are connected to the synchronisation channels of the 7020RC control
board. The selection and connection of the various synchronisation channels is described
below. Only the described combinations of synchronisation channels are available.
A re-configuration of these modes automatically triggers a RESET after configuration in the
system.
2.3.2.1 Multi-Source with GPS (Channel 1) and Master/Slave-String (Channel 3)
The combination of GPS and Master/Slave-String can be selected via the following two bit
combinations in the "Synchronisation Settings Byte". The primary and secondary sources
can also be assigned. After the initial setting of one of the two bit combinations a System
Reset is carried out automatically. When there is a changeover within this multi-source mode
no System Reset is carried out and the system then continues with quartz system status.
B3 B2 B1 B0 Abbreviation in Time Display Synchronisation Source
1 0 0 1
alternately >GPS_ and SER_
Primary source: GPS
Secondary source:
Master/Slave-String
1 0 1 0
alternately >SER_ and GPS_
Primary source: Master/Slave-
String
Secondary source: GPS
2.3.2.2 Multi-Source with DCF77 Pulse (Channel 2) and Master/Slave-String
(Channel 3)
The combination of DCF77 pulse and Master/Slave-String can be selected via the following
two bit combinations in the "Synchronisation Settings Byte". The primary and secondary
sources can also be assigned. After the initial setting of one of the two bit combinations a
System Reset is carried out automatically. When there is a changeover within this multi-
source mode no System Reset is carried out and the system then continues with quartz
system status.
B3 B2 B1 B0 Abbreviation in Time Display Synchronisation Source
1 0 1 1
alternately >DCF_ and SER_
Primary source: DCF77 pulse
Secondary source:
Master/Slave-String
1 1 0 0
alternately >SER_ and DCF_
Primary source: Master/Slave-
String
Secondary source: DCF77 pulse

MULTI-SOURCE SYSTEM BASED ON SYSTEM 7001RC
Multi-Source Function System 7001RC - V02.01 19 / 31
hopf Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [email protected]
2.3.3 Delayed Changeover between Primary and Secondary Source
The automatic changeover from the selected primary source to the secondary source
depends on two factors:
• Validity or availability of the synchronisation signal
• Expiry of the "Sync. Status Change after Sync. Fail" timer
The timer bridges failures of the primary sync. source and maintains the status of the clock
system on radio status "R" for the time set by the user (possible settings: 2 - 255 minutes).
The setting to be made depends on the difference in accuracy between the primary and
secondary sources.
If the primary source is significantly more accurate than the secondary source then the
internal quartz base of the system is also controlled correspondingly more accurately.
In the event that the primary source fails for a few minutes, the system then continues to run
demonstrably more accurately using this control value than if it were to be re-synchronised
via the secondary source. For this reason it is sensible to prevent a premature changeover
by means of the timer, in order to maintain system accuracy.
2.3.4 System Behaviour on Summertime/Wintertime Changeover
Bits 5 and 6 are used to define the changeover times for summertime / 'wintertime via the
"Synchronisation Settings Byte".
Bit 6 Bit 5 System Behaviour
0 0 ST/WT changeover is only carried out by the external source. The system
7001RC internal changeover times are ignored.
(GPS always requires the internal ST/WT changeover)
1 0 ST/WT changeover is carried out, dependent on the status of the external
source system, either via the external source or via the internal
changeover times:
• Changeover times are carried out by the external source provided
that this is delivering valid time information
(GPS always requires internal ST/WT changeover)
• Changeover times are carried out by the system 7001RC internal
changeover times if the external source is not available.
x 1 ST/WT changeover is only carried out via the system 7001RC internal
changeover times. Changeover times transmitted via the sync. sources are
ignored.

MULTI-SOURCE SYSTEM BASED ON SYSTEM 7001RC
20 / 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]
2.3.5 Configuration of the Master/Slave-String Time Base
Different time bases can be set for the Master/Slave-String.
2.3.5.1 Local Time as the Time Base in the Master/Slave-String (Standard)
As standard the 7001RC system is synchronised with the local time information via the
Master/Slave-String. For this purpose Bit 2 is set to "0" in the "Function Control Byte".
The system UTC time is calculated via the local time, the system-internal values for the time
difference between UTC and local time and the summertime/wintertime status information.
Synchronisation via the Master/Slave-String
"Function Control Byte", Bit 2 set to "0":
• The received time is local time
• The system UTC time is calculated
In the event that UTC time is received when in this setting, this is interpreted as
local time and accordingly all times in the system are incorrectly displayed.
2.3.5.2 UTC as the Time Base in the Master/Slave-String
When UTC time is transmitted via the Master/Slave-String then this is to be set up in the
"Function Control Byte", by setting Bit 2 to "1".
The system UTC time is calculated via the UTC time, the system-internal values for the time
difference between UTC and local time and the summertime/wintertime status information.
Synchronisation via the Master/Slave-String
"Function Control Byte", Bit 2 set to "0":
• The received time is UTC time
• The system local time is calculated
In the event that local time is received when in this setting, this is interpreted as
UTC time and accordingly all times in the system are incorrectly displayed.