Allied Vision BONITO, Техническое руководство

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Bonito Technical Manual V2.4.0
43
Parameters and commands
Related Parameters
D
,
F
,
K
,
M
,
N
and
S
.
Frame duration must always be greater than exposure time.
Examples
K=53
(0x53 = 84), sets prescaler tick length to 84 clock cycles, which cor-
responds to 1.5 μs
E=6BE
(0x6BE = 1726), sets exposure time to 1726 prescaler ticks
F=FA0
(0xFA0 = 4000), sets frame duration to 4000 prescaler ticks
M=3
activate free-running exposure mode using
E
and
F
Result:
exposure time = 1726 * 1.5 μs = 2589 μs
frame duration = 4000 * 1.5 μs = 6000 μs
K=A7
(0xA7 = 167), sets prescaler tick length to 167 clock cycles, which
corresponds to 3 μs
E=50000
(0x50000 = 327680), sets exposure time to 327680 prescaler ticks
F=50001
(0x50001 = 327681), sets frame duration to 327681 prescaler ticks
(greater than exposure time)
M=3
activate free-running exposure mode using
E
and
F
Result:
exposure time = 327680 * 3 μs = 983040 μs = approx. 1 s
frame duration = 327681 * 3 μs = 983043 μs
Frame duration (F)
The frame duration is a 32-bit value. Its time resolution depends on the
prescaler value
K
. For detailed information see chapter Timer prescaler value (K)
on page 46.
Range From
2
to
FFFFFFFF
, depending on
K
,
M
and
N
. Observe meeting the respec-
tive minimum
Default
6BF
Related Parameters
D
,
E
,
K
,
M
,
N
and
S
Example
S=3
enable dual channel Camera Link with grabber compatibility
Note

The exposure time control using this value is only active if the
trigger mode
M
is set to the values of
2
or
3
.
This parameter will be ignored if the Permanent Exposure
mode, or PIV mode, or Enhanced Full Well mode, is activated.
However, even if one of the above mentioned modes are set, it
may be necessary to set this parameter to get a correct internal
timing sequence.
For more information see chapter Exposure control mode (M)
on page 46.