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Inspection Mode
iLand Landing System
iLand Compact is a rugged, highly accurate landing system. iLand uses an encoder to gauge pre-
cise hoistway position and three separate Hall-effect sensors to level the elevator car accurately
at each landing. iLand is designed for easy installation and adjustment and to provide mainte-
nance-free service.
Position Feedback
A simple, durable wheel assembly rides the elevator rail as the car moves. Wheel-to-rail tension
is maintained by two springs. Mounted with the wheel is a magnet that rotates as the wheel
turns. The rotation of the magnet is detected by an integrated circuit (encoder) which generates
two pulse streams, phase-offset by 90 degrees. The encoder generates 348 pulses per foot of
travel.
Direction
By monitoring both pulse streams, iControl
can tell the direction of elevator travel by
detecting which stream is the "first to
arrive." For example, when the elevator is moving up, DP1 leads DP2. When the elevator is mov-
ing down, DP2 leads DP1.
Position
During floor height "learn" operations, iControl counts the total number of pulses from the bot-
tom to the top of hoistway travel and also stores the floor height position (pulse count) at each
landing. During normal elevator operation, iControl uses the floor height information and the
encoder pulse count to accurately track the elevator car position in the hoistway.
"Learning the Floor Heights" on page
Landing Accuracy
During installation, running in Inspection mode, the elevator is manually leveled at each land-
ing. With the car level at the landing, a six-inch strip magnet is placed near the hollow of the rail
curvature, vertically aligned with a row of three sensors on the iLand landing system. If the car
has both front and rear doors, a second strip magnet is placed on the opposite side of the rail
and a second set of sensors is used. Placement of the magnets in vertical alignment with the
sensors should be as accurate as possible.
During automatic operation, the iController uses signals from the three sensors (Up Level, Door
Zone, and Down Level), factors in speed and position information, and comfortably and accu-
rately "lands" the elevator car to within 1/32" of floor level.
Logic
If required, the Floor Offset Distance parameter may be adjusted to compensate for inexactly
placed floor magnets (see Calibrating the Floor Offsets in Section 4 of the User Guide). Using
this parameter, you can offset the car level-at-floor point by ± 0.5 inches.
The positions of the floor magnets are recorded during hoistway learn operations (see Learning
the Floor Heights in Section 4 of the User Guide). Each time a magnet is encountered, the iCon-
troller learns the position of the magnet with respect to the bottom floor. This learned height,
the "floor height," is stored in system memory.
3-2 Manual # 42-02-2222
4-2.
Pulse Stream DP1
Pulse Stream DP2
Please refer to
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Table of Contents
Troubleshooting
