8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 100
8.1.3.
Read the LineStatus
1)
Read the level of single line
The camera can get the line's signal status. When the device is powered on, the default status of Line0 is
false, and the default status of Line1, Line2 and Line3 is true.
2) Read all the lines level
The camera can get the current status of all lines. On the one hand, the signal status is the status of the
external I/O after the reversal of the polarity. On the other hand, signal status level can reflect the external
I/O level.
All the lines level status bit of the camera are shown in Table 8-1. The default polarity does not reverse.
The default value of MER2/ME2P/ME2S cameras is 0xE, and the default value of ME2L cameras is 0x4.
Line3
Line2
Line1
Line0
1
1
0
0
Table 8-1 Camera line status bit
8.2.
Image Acquisition Control
8.2.1.
Acquisition Start and Stop
8.2.1.1.
Acquisition Start
It can send AcquisitionStart command immediately after opening the camera. The acquisition process in
continuous mode is illustrated in Figure 8-13, and the acquisition process in trigger mode is illustrated in
Figure 8-14.
Continuous Acquisition
Exposure
Reading out
Start Status
…
…
…
…
Figure 8-13 Continuous acquisition process
In continuous mode, a camera starts to expose and read out after receiving the AcquisitionStart command.
The frame rate is determined by the exposure time, ROI and some other parameters.
