MCi iControl User Manual page 179

tion cables will vary with the position of the car in the hoistway. iControl must learn the empty
and full car load value at each floor. The load in the car can then be determined by reading the
value at a given floor and subtracting the learned empty value for that floor.
Isolated Platform Load Weigher - The isolated platform load weigher measures only the
weight within the car. The value is not affected by hoistway position so empty and full values
can be learned without moving the car from floor to floor.
Note: If you are preparing to do safety testing, including governor and buffer tests, you might
want to do them first, then adjust the load weigher because recalibrating the load weigher is rec-
ommended following buffer safety tests.
Load Thresholds
• Over load threshold (% of full load): Used to define the load at which it is unsafe to
move the elevator (iView Configuration > Load Weigher tab). If this threshold is exceeded,
the car will remain at the floor with doors open. Typically some type of visual and/or audi-
ble indicator is used to alert passengers that the car is overloaded. (This operation is over-
ridden during Fire Service operation.)
• Heavy load threshold (% of full load): Used to define the load value at which hall
calls will be bypassed or reassigned (iView Configuration > Load Weigher tab).
• Light load threshold (% of full load): Used to define the load at which a limited num-
ber of car calls may be registered. If the programmed number of car calls is exceeded, all
car calls will be canceled.
Example: Light Load Threshold=20%. If the measured load in the car is less than 20%, the
controller will only allow a certain number of car calls to be registered (number of calls is
set on the iView Configuration > Car Operation > Passenger tab/Anti-Nuisance controls
shown below). If the allowed car value is set to three, only three calls may be registered if
the load is less than 20%. If a fourth call is entered, all car calls will be canceled.
• Empty load threshold (% of full load): Used to determine when the car is empty. If
the load falls below the threshold the car is considered to be empty. This can be used for
CFSS (Commandeer for Special Services) calls where it is desired that the commandeered
car be empty. Please refer to "Car Operation - CFSS Tab" on page
Note: Setting a threshold value to 00% will disable the corresponding function (anti-nuisance,
hall call bypass or overload). Example: setting the Heavy Load Threshold to 00% will disable
the hall call bypass function.
Load weighing logical functions such as Anti-Nuisance, Heavy Load, and Overload will be inac-
tive until both the full and empty load values have been learned and saved.
Load Weigher Adjustment for Dispatching
The load thresholds used in logical operations are:
9-73.)
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