Campbell Scientific CC640 Digital Camera - Manual (Page 32)

CC640 Digital Camera
• Set the parameter PakBus Destination Address to the device that is
intended to retrieve the images.
• Set the RS-232 BAUD rate to match the BAUD rate of the device being
connected to the camera.
Refer to Section 3 for additional information and connections diagrams using
the RS-232 port.
10.2.4 RS-485 Communication
The camera can download images via its RS-485 port using the PakBus
protocol. An MD485 can be used to transmit images via PakBus from a
camera to other devices:
• Set the parameter PakBus Port to RS-485
• Set the parameter PakBus Address to a unique value in the PakBus
network.
• Set the parameter PakBus Destination Address to the device that is
intended to retrieve the images.
• Set the RS-485 BAUD rate to match the BAUD rate of the RS-485
network that the camera is being connected to.
Refer to Section 4.5 for additional information on the RS-485 port.
10.2.5 Concurrent Communication
PakBus allows the camera to download images to a datalogger simultaneously
with other datalogger communication. A communication 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.
11. Power Calculations and Timings
The CC640 was specifically designed for operation in power-constrained
systems such as solar powered sites. It is critical in such systems that the
power switch on the camera always be left in the AUTO position to take
advantage of the low power mode. This section outlines power consumption of
the camera for purposes of power supply design for a system.
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