SP-5000M-CXP4 / SP-5000C-CXP4
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7. Operating modes
7.1. Acquisition control (change the frame rate)
7.1.1 Acquisition frame rate
With Trigger OFF (free-running mode – see section 7.2.1), the default frame rate of the camera is
based on the specified ROI. The smaller the ROI, the faster the default frame rate. However, it is
possible to specify a free-running frame rate (i.e., no trigger needed) that is slower than the default
rate. This can be useful when a longer exposure time is needed for a specific ROI.
Modification of the frame rate is done by entering a value in the AcquisitionFrameRate control
corresponding to the frequency to be allocated to each frame period. Allowed values range from
25691 Hz to 0.125 Hz for SP-5000M-CXP4, however if the frequency entered is faster than the time
required for the default frame rate, the setting is ignored and the default frame rate is used. For
example, the minimum frame period for the smallest possible ROI (64H x 8V) requires 25691 Hz, so
any entry more than 25691 will always be ignored.
The setting range in Acquisition Frame Rate is:
Shortest
to
Longest
Inverse number of time
required to drive all pixels
in the area set by ROI
command or
inverse number of time
required to transmit one
frame data
to
0.125 Hz = 8 seconds
For the above setting, Acquisition Frame Rate (unit: fps or Hz) is used.
Acquisition Frame Rate: 25691 Hz to 0.125 Hz
How to set:
ROI should be set first.
The number shown in Acquisition Frame Rate will correspond to the maximum frame
frequency for the specified ROI.
The value can be decreased up to 0.125 Hz.
If ROI is changed from a smaller size to a larger size, the default frame frequency of the
ROI is automatically recalculated inside the camera and changed to the frame rate of
the new ROI.
7.1.2 Calculation of frame rate
The frame rate for a specific ROI is calculated using the following formula.
１．
If Sensor Pixel Format is Mono/Bayer 8-bit,10-bit or12-bit
𝑡_𝑟𝑒𝑎𝑑𝑜𝑢𝑡[𝑠𝑒𝑐] =
𝑡
𝑟𝑜𝑤
× (𝑁𝑟𝑜𝑤𝑠 + 𝐾 + 2) + 1 + (𝑡
𝑟𝑜𝑤
× 3) + 𝑁𝑐𝑦𝑐𝑙𝑒_𝐹
𝑓_𝑠𝑦𝑠
𝐹𝑟𝑎𝑚𝑒 𝑟𝑎𝑡𝑒 [𝐻𝑧] =
1
𝑡_𝑟𝑒𝑎𝑑𝑜𝑢𝑡[sec]
