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6842 GPS Slim Line System - V09.01
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]
7.1.2.4 Error Byte Display
Internal System errors can be identified during a faulty synchronization by means of the Error
Byte (see
Chapter 4.1.2.10 Error Byte
).
7.1.3 Error Relays
There is a SUB-D connector with two relay outputs for the status output on the rear side of
the System (see
Chapter 2.7 Error Relays Connection
).
7.1.3.1 "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.
7.1.3.2 "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
influenced by the "Status Change After" setting (see
Chapter 4.1.4.1 Delayed Sync. Status
Change
).
7.1.4 Send LED
Boards without a Send LED
Function Boards without a Send LED are supplied with the appropriate time information such
as DCF77 pulse and PPS directly from the Control Board. The output of serial strings is also
possible for this board type (additional system-internal wiring is required).
Boards with a Send LED
Function Boards with a Send LED have their own processor. They are provided with
information via the System bus. These boards can prepare this time information and output it
in the respective board-specific form.
7.1.5 Auto-Reset Logic (System Bus)
The System has circular auto-reset logic. This means that each board inserted into the
System bus is integrated into a reset circuit. In the event that:
•
a board is removed from the System
•
a board is defective
•
a Function Board is in an undefined condition (program malfunction)
then this is recognized by the Control Board 6842 and the System triggers a system-wide
hardware-reset.
Bus-Bridge Boards installed in the factory are integrated into the auto-reset circuit and can
be replaced by suitable Function Boards without system-internal modifications.
