T
ABLE OF
C
ONTENTS
Multi-Source Function System 7001RC - V02.01
5 / 31
hopf
Elektronik GmbH
Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: [email protected]
Contents Page
1
Multi-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
2
Multi-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
