Campbell CCFC Field Camera, Instruction Manual

Page: 109 / 127

CCFC Field Camera
95
saved through a power cycle or in Off Mode , but do need to be
updated every time a photo is sent. When using PakBus variables
for GPS, coordinates must be entered in decimal coordinates.
15.3.1 PakBus Control of Window Defroster Function
Users are advised to only use one type of control to avoid
unexpected operation of the defroster. The two options are:
1. Automatic Mode set via the web interface or Device
Configuration Utility.
2. Using one-shot mode via the PakBus SendVariables
command.
To turn on the defroster, a non-zero numeric value (i.e. 1) should
be sent to the camera. When a non-zero value is sent to the
camera, the heater will turn on and a 65 second countdown timer
will start. After 65 seconds, the defroster will automatically turn
off (unless the defroster is turned on via the
Automatic Mode
settings). If an additional non-zero is sent before the defroster is
turned off, then the timer will be reset and will begin the
countdown again from 65. Sending a zero value using this
variable will not turn off the defroster regardless of which method
was used to turn it on.
The defroster commands should be sent to the camera every 60
seconds or less to ensure continuous operation.
The defroster will not be allowed to turn on at internal
temperatures above +25°C.
15.3.2 PakBus Control of CCFC Power
The ability to shut the camera down safely using a PakBus
command is available in the CCFC. By writing a value of 1 (or
any value not equalling zero) to the public Boolean variable
CCFCShutdown the camera initiates a shutdown and power down
cleanly. The shutdown process can take up to 30 seconds. The
camera will turn back on after 10 minutes or can be externally
triggered.
Following is an example of the CRBasic command that will shut
down a camera with PakBus address 55:
SendVariables (SendVarResult,Com1,0,55,0000,400, “Public”,
“CCFCShutdown”,1,1)
15.3.3 Example Program
– SendVariable Instruction – Datalogger
The following example illustrates the use of the SendVariable
instruction to alter Still Photo Banner #2, as well as toggle the
camera window defroster.