Dialight D1RW-L13-008 Vigilant L866/L885 LED Based Dual Red / White Catenary - Manual (Page 21)

Document No.
9100-127-1426-99 Rev D
Release Date: 10/26/2010
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Dialight Corporation 1501 Route 34 South Farmingdale NJ 07727
Tel: 732.919.3119 Fax: 732.751.5778 Web: www.dialight.com
Page 21 of 25
Override
Override information can be written to the microcontroller board using the
following protocol:
Master transmission
Byte
Value
0 ‘O’
1 ‘W’
2 ‘R’
3 Override mode array.
These bits are only applied if the Enable bit (bit 0) is high and ignored
otherwise.
These bits are defined as follows:
0) Override enable: 1 to force unit to use override data, 0 for unit to use
external signals
1) Day/Night select: 1 to set unit to day mode, 0 to set unit to night mode
2:3) Dimming select: 0 to set dimming level to 100%, 1 to set dimming
level to 30%, 2 or 3 to set dimming level to 10%
4) Steady burn select: 1 to put unit in steady burn mode. Note that this
only affects the red night mode; it has no effect on the white mode.
4 Override flag array.
These bits are defined as follows:
0) Must be set to 0.
1) Clear Faults: 1 to clear internal faults and restart monitoring, 0 for
normal operation
2) Sync override: 1 to initiate in immediate synchronization. Behavior is
identical to reception of an external synchronization pulse.
5 8 bit checksum, computed over bytes 3 to 4
Slave Response
Byte
Value
0 ‘O’
1 ‘W’
2 ‘R’