Instruction manual

CC5MPX Digital Camera
69
Figure 10-1 RS-485 Shown in PakBus Port Setting
11. PakBus Communications
The camera uses the PakBus protocol to send image files from the camera to the
datalogger or other PakBus compatible devices. The Loggernet Tool PakBus Graph
can be used to change the configuration of a camera. The use of the PakBus Graph
is discussed in Section 11.2. Refer to the Loggernet literature or software for more
details.
PakBus can also be used to control specific operational parameters, transfer
variables or text between the datalogger and camera. When an image or video file
is ready to be transmitted, the camera will initiate communications and send the
image or video via the selected serial interface.
The CC5MPX is capable of producing video files that exceed 30MB in size. Trying
to send such a large file to a datalogger using PakBus can be problematic. For this
reason, the CC5MPX is setup to not send any files using PakBus that are larger
than 2MB.
The camera is a PakBus Lead node and is not capable of performing any routing.
However, the CC5MPX has the ability to communicate with devices that are
several hops away on the PakBus network.
11.1 Concurrent PakBus Communications
PakBus allows the camera to download images to a datalogger simultaneously with
other datalogger communications. A communications task will take longer is the
datalogger is communicating with multiple devices at the same time.
It may be beneficial to set up the system to avoid image transfers when other
communications are scheduled.
For example, longer connect times on long distance telephone connections can be
avoided by scheduling image transfers from the camera to the datalogger outside
the scheduled data collection time. If a station is called on the hour to retrieve data,
image acquisitions could be initiated before the scheduled call (15 minutes prior) to
shorten the connect times.
Set for RS-485