Latch-Lock
Latch-Lock is a control mode available to any dimmer circuit (see
switched mode, Latch-Lock features an additional safeguard so that circuits cannot be turned on or off
as easily. The circuit only turns on when a
time, and only turns off when a different control level range is held for another amount of time.
Latch-Lock is useful for avoiding accidental dowsing of arc lamps during shows (often caused by
running the grandmaster down). By requiring a level range and time, most master fades will not hover
in a given range for long enough to trigger on or off.
The level ranges and times can be edited on a per dimmer basis (see
page 17
). On and Off level ranges may not overlap.
Level
Latch-Lock off range
Latch-Lock on range
relay closed
(circuit on)
relay open
(circuit off)
Lug
"Lug" refers to a physical position in the rack. Lugs are always numbered counting downwards from
the top of the rack, starting at 1. Some modules may take up multiple lug positions in the rack.
System Reference
defined
Diagram of How Latch-Lock is Applied to a Circuit
Latch-Lock
During this time interval the
On Time
control source can go to any level
and the circuit will stay on (relay
closed) as long as the control
source level does not stay in the
Latch-Lock off range longer than
the Latch-Lock off time value.
relay closes
(circuit turns on)
Control
control level range is held for a
Dimmer Property Definitions
Latch-Lock
Off Time
relay opens
(circuit turns off)
on
page 17
). Similar to
specified
amount of
Control Level
Time
Time
on
7
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