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7. Warning messages
Warning messages can appear on the screen at any time during normal operation. They will automatically clear when the warning condition is
rectified. Below is a summary of possible messages :
Liftwatch Rail Operators Manual 560386-000 Issue 1.2 © Prolec Ltd - Feb 2011
Certain duties may be barred. If an attempt is made to access a barred duty, this message will appear, the
amber LED will flash the internal alarm will operate and further machine motion will be prohibited. Barred
duties will have been established during installation and are usually to protect particularly poor lifting zones.
The RCI performs checks on adjacent duty sectors. If the machine is moving towards a sector that would be
unsafe, this message will appear , the internal alarm will operate and the amber LED will flash. No motion
control will occur. The RCI will check the adjacent duties only when within a pre-set number degrees from a
duty change (default = 5°).
If the machine is working on rail in a lift and carry duty the RCI will continuously check the equivalent higher
cant level duties. If the cant is increasing as the machine travels this message will appear if the impending
duty change would be unsafe. The internal alarm will operate and the amber LED will flash. No motion
control will occur.
This message will appear if the measured track cant exceeds a pre-define limit (default = 180mm). The
internal alarm will operate and the amber LED will flash. No motion control will occur.
This message will appear if the measured track gradient exceeds a pre-define limit (default = 1 in 30). The
internal alarm will operate and the amber LED will flash. No motion control will occur.
This message will appear if the current height limit is exceeded. The external and internal alarm will operate,
the amber LED will flash and appropriate motion control will occur. The message will contain one of the
following reasons:
1.
Bucket pin too high
3.
Artic pivot pin too high
11
2.
Arm ram pin too high
4.
Quickhitch too high (If quickhitch angle sensor fitted)
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