Controlling Initial Start of Car Motion
42-02-7223 C1 4-21
4
iControl DC
Balanced Load Method
This method requires gain and position compensation adjustment when balanced load is placed
in the car. Furthermore, verification is required when the car is empty and fully loaded at each
serviceable landing.
Since the adjustments for this method occur only at the top and bottom terminal floor, unusual
pre-toque requirements at other landings are not accommodated (i.e. warped rails).
This method must be used when no load weigher is available and the No pretorque option or
Synthetic pretorque option is used.
Empty/Full Load Method
This method collects Pretorque information during a learn process with a car that is empty and
fully loaded. No Pretorque adjustments are required. This method allows the collection of pre-
torque information for up to 35 floors and requires Pretorque information for at least the top
and bottom terminal floor. As a result, with pretorque information collected only for the top
and bottom terminal floor, this method mimics the Balanced Load method.
Let us assume a building with 4 floors. A fully configured table would contain 4 entries:
• Row 4 would correlate to floor 4.
• Row 3 would correlate to floor 3.
• Row 2 would correlate to floor 2.
• Row 1 would correlate to floor 1.
A minimally configured table, on the other hand, would only contain 2 entries:
• Row 2 would correlate to floor 4.
• Row 1 would correlate to floor 1.
Needless to say, the number of table entries can vary from 2 to the number of floors (as long as
the number of floors is 35 or less) in the building. The following examples offer some possibili-
ties between a minimally and fully configured table:
• A 6 story building with a 4 entry table - floor 1, floor 3, floor 4, and floor 6.
• A 7 story building with a 4 entry table - floor 1, floor 3, floor 5, and floor 7.
• A 12 story building with a 4 entry table - floor 1, floor 5, floor 7, and floor 10.
• A 17 story building with a 5 entry table - floor 1, floor 5, floor 9, floor 13, and floor 17.
Since pretorque information is available for up to 35 landings, unusual pretoque requirements
at landings are accommodated (i.e. warped rails).
This method can only be used when a load weigher is available. It is also only available for Sys-
tem 12 drives.
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