Slew Operation Limit Monitor
- Warns the operator if entering into limited sectors
- Keeps track of maximum slew positions
- Can provide Anti-Collision warning signals
Display and Main Unit are available certified to comply with
Atex for use in zone 2, sensors to zone 1. The digital display is backlit to
increase the contrast and for use in darkness. Audible and visual alarms can be
generated and an inbuilt self diagnostic fault finding system is incorporated.
Mipeg Operation Limit Monitor - OLM
Sector limitation in 2D:
The system monitors and will warn
the operator if the crane approaches the slew limits, Clockwise (CW) limit or
the Counter Clockwise (CCW) limit.
Sector limitation in 3D:
If a boom angle sensor is
incorporated into the system or if the OLM is an integrated part of the
Mipeg 2000 system, the unit may be set up as a 3D monitoring
system. This will act as the sector limitation featured above but additionally
two boom angle limits may be programmed. The crane can then pass the above
defined sector if the boom angle is above or below pre-programmed angle limits.
Maximum slew position protection
have no electrical slip ring and use cables to the motors and other parts of the
crane. In these cases it is critical to keep track of the slew position. If not
the cabling running up to the crane can be damaged due to twisting with
consequential damage to the crane, crane system and personnel. The OLM system
will memorize the slew position and warn the operator if the maximum travel
limit or revolutions are reached.
The above feature may be
programmed to act as an anti-collision system. If two cranes (or more) work
within the same deck area, the system will limit the operation to avoid more
than one crane operating in the “over-lapping” area at any one time. This
feature requires a signal between the cranes.
The display comprises 4
lines of 20 characters,
10 mm in height. The display is back lit for night
time operation and has 4 hermetically sealed push buttons. The push buttons are
used for selecting features and calibration purposes.
Speed, Direction and Slew Position Sensor
An absolute rotational shaft encoder is used to measure both speed and direction
or the slew angle position of the crane. The sensor is not affected by power
loss. Operating temperature is from -20 to + 60 degrees C. The sensor is sealed
to IP 66. Other sensors are also available.
The microcomputer with all
required interface circuits is mounted in an enclosure sealed to IP65
Operating temperature range for the unit is -10 to + 60 degrees C.
Boom Angle Sensor (optional)
The boom angle
sensor is a gravity based sensor measuring the boom inclination. The sensor is
sealed to IP66 and the operating temperatures is between -40 to + 65 degrees C.
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