hopf Elektronik GmbH 6844, Technical Manual

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S
YSTEM
I
NDICATORS
/ F
AULT
A
NALYSIS
/ T
ROUBLESHOOTING
System 6844(RC) - V03.00 139 / 157
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: info@hopf.com
9.1.2.3 Position Display (GPS only)
Depending on the position entered manually by the user, it can be identified from the position
display whether the GPS receiver calculated the position correctly and was / is therefore
synchronous.
The last two digits of the item on manual entry are always 00. After synchronization of the
clock system, 00 should no longer be displayed on at least one of the two lines; rather, the
complete position as computed by the GPS receiver should be displayed.
9.1.2.4 SyncOFF Timer
The SyncOFF timer display shows whether the timer is running (the System outwardly dis-
plays status
"r" but is no longer synchronized by the synchronization source).
It is also possible to read whether the timer has expired or was not yet activated.
9.1.2.5 Display of ERROR-Byte
Internal System errors or other problems can be identified during a faulty synchronization by
means of the Error Byte (see
Chapter 5.3.2 ERROR-Byte ).
If at least one bit in the ERROR byte is active, an "E" is displayed on the
bottom right of the display and the backlight flashes while the standard dis-
play is in the 1Hz pulse.
9.1.2.6 Settings of the Synchronisation Mode
In cases of missing synchronisation, display of the system byte allows the verification of the
correct selection of the Sync.-Mode (see
Chapter 5.2.13.1 Synchronization Mode).
9.1.3 Error Relays (1U Systems only - Optional for 3U / Table-Top / Wall)
There is a SUB-D connector with two relay outputs for the status output on the rear side of
the System (see
Chapter 3.2.7 Error Relays Connection ).
9.1.3.1 "Power" Relay
The "Power" error relay is activated as soon as the System is supplied with the operating
voltage. This relay drops out if

the operating voltage fails,

the System is switched off or

the power supply unit is faulty.
9.1.3.2 "Sync" Relay
The "Sync" error relay is activated as soon as the System reaches "Sync" status (r, R on the
display). A fall-off signals the loss of synchronization. The action of the relay can be influ-
enced by the "SyncOFF Timer" setting (see
Chapter 5.3.6 SyncOFF Timer - Delayed
Change of Sync. Status ).