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- Command input for lifting/lowering proportional valves in MDI-PRC

version.

To turn from the first to the second function is just enough to set PEDAL

BRAKING to NONE.

This option handles the analog input CNA#18 when used as pedal braking

input:

- ANALOG: With this setting is possible to modulate the strenght of

the braking when the accelerator is released. The

strenght of the braking is proportional to the brake pedal

potentiometer connected to this input.

When the pedal potentiometer voltage is equal less than

the SET POT BRK MIN (see 12.4.2.1) the minimum

release braking strength is applied (following the

RELEASE BRAKING setting).

When the pedal potentiometer voltage is equal higher

than the SET POT BRK MAX (see 12.4.2.2) the maximum

release braking strength is applied (following the PEDAL

BRAKING setting).

In the intermediate position, the electrical braking strength

is a linear function between the minimum (RELEASE

BRAKING) and maximum (PEDAL BRAKING) intensity.

When there is also a switch connected to the pedal

braking (i.e. SET INPUT #4 to level BRAKE), it must be

closed, otherwise the release braking is stuck to the

minimum strength disregarding the pedal potentiometer

position.

- DIGITAL: No pedal potentiometer is expected. Only when both the

SET INPUT #4 is Level BRAKE and the brake switch

connected to CNB#7 is closed, the release electrical

braking follows the PEDAL BRAKING setting (maximum

strength); in all of the other conditions the release

electrical braking follows the RELEASE BRAKING setting

(minimum strenght).

- NONE: The analog input CNA#18 is not used for the release

braking modulation.

12) QUICK INVERSION

This option specifies the quick inversion mode when the SET INPUT #4 is set

BELLY. It can be set one of three:

- NONE: The quick inversion function is not managed (no effect

when CNB#7 switches over).

- TIMED: The quick inversion function is timed.

- BELLY: The quick inversion function is managed but not timed.

13) AUX VOLTAGE #1

This option specifies the percentage of the key voltage to be applied to the

loads on CNA#1 (main contactor coil) and CNA#3 (electromechanical brake).

The voltage modulation is got with a PWM at 1KHZ frequency. After an initial

delay of about 1 sec in which the entire key voltage is applied to the loads,

the PWM reduces the voltage at the loads down to the specified percentage.

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Zapi COMBI AC1 Manual de usuario Pagina 37

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