Campbell CC5MPXWD, Инструкция по эксплуатации

Страница: 93 / 126

CC5MPX Digital Camera
81
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 30 MB 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 2 MB.
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.
8.8.1 Concurrent PakBus Communications
PakBus allows the camera to download images to a datalogger simultaneously
with other datalogger communications. A communications task will take longer
if 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.
8.8.2 PakBus Graph Operations
The CC5MPX supports configuration via
PakBus Graph
over the serial port.
A datalogger or other type of PakBus relay device is required to interface
PakBus Graph to the camera.
8.8.2.1 Datalogger Settings
The datalogger must be configured as a router (i.e., Is Router must be set to
TRUE ) and the camera PakBus address must be in the list of allowed
neighbours for the datalogger port used. The camera and the datalogger must
be set to use the same baud rate to communicate properly.
8.8.2.2 Discovery
After starting PakBus Graph , the camera may not be visible immediately. To
discover the camera, right click on the green box marked as [4094] in the
graph and click Search for Neighbours . This will open the Search for
Neighbours dialog box, press
Start
and the graph should display all the devices
within the PakBus network.
8.8.2.3 Power Modes
The camera has several low power modes. The CC5MPX cannot respond to
PakBus communications while the camera is in the low power mode, such as
OFF or Deep Sleep. PakBus communications will wake up the camera if it is
set for Partially On mode. Using the low power mode with the Ethernet power