FANOX SIL-V, User Manual, Page: 42 / 212

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The sync function generates the following bits:
25 Sincronismo
LLLB: Live line, live bar
LLDB: Live line, dead bar
DLLB: Dead line, live bar
DLDB: Dead line, dead bar
Module difference
Frequency difference
Phase difference
LLLB, LLDB, DLDB and DLLB bits indicate the status of the line and the bar regardless of
the operation permissions statuses.
The line and bar voltage monitoring unit sets the dead or alive state of the line and bar.
Transitions from dead to live and vice versa are timed with a user adjustable time. During
the transition the line or bar is in undefined state. At such moments, as seen in the logical
diagram of the algorithm, the closing permission is not activated.
Once the voltage exceeds the live state level, a timer is started during which we turn to
undefined state until the timer ends. At this moment, indicates the live status of the bar or
line.
When the voltage falls below the level of dead state, a timer is started during which we
turn to undefined state until the timer ends. At this moment, indicates the dead status of
the bar or line.