Cattron CT24 Series, User Manual

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CT24 MCU
User Manual
48
9M02-7608-A001-EN
Version 2.0
7.4.2 Feature Options
There are three Range Control options:
–
Close Start - requires the operator to approach the machine before start is possible ( antenna diversity
is optional )
–
Range Limit
– limits the maximum operating range (
requires antenna diversity )
–
Range Minimum - limits the minimum operating range
•
Range Control is available for either 433-434 MHz or 450-470 MHz using the LRM transceiver.
•
It may use a single antenna to implement the Close Start option, but the use of dual antennas can provide
multiple Close Start locations.
•
The use of dual antennas is required to improve precision when using the Range Limit or Range
Minimum options.
•
A one-time system calibration is required; this can be made via a serial adapter directly attached to the
MCU. Alternatively system calibration may be carried out on the ground with a laptop computer via a long
range
Bluetooth ® wireless technology link that is temporarily connected to the MCU. A Class 1 Bluetooth
Dongle may also need to be fitted to the PC to increase the range beyond that which is built in to the
Bluetooth device.
7.4.3 Operating Modes
There are three operating modes as described below. It is possible to select only a single mode or a combination
of Close Start and Range Limit, or Range Limit and Range Minimum, but not Close Start and Range Minimum.
Figure 25: Signal Strength Decreases as Distance Increases
7.4.3.1 Close Start
Close Start (CS) is the primary mode that both enforces security and can be set up with a good level of precision.
When set, it requires an operator to approach the crane or machine before it is possible to reset the remote and
gain control of the machine. Typically, the close start range would be set to about 6 m (20 ft) maximum. This zone
is set as an unreliable zone, meaning that it might require the operator to move around a little in the CS zone
before it is possible to gain control. This will only take a few seconds and is not a problem before operation has
commenced.