Diagnosis
The microcontrollers continually monitor the inverter and carry out a diagnostic procedure on the
main functions. The diagnosis is made in 4 points.
Diagnosis on key switch closing that checks: watchdog circuit, current sensor, capacitor charging,
phase's voltages, contactor drivers, can-bus interface, if the switch sequence for operation is
correct and if the output of accelerator unit is correct, correct synchronization of the two
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CS,
integrity of safety related inputs hardware.
Standby diagnosis in standby that checks: Watchdog circuit, phase's voltages, contactor driver,
current sensor, can-bus interface.
Diagnosis during operation that checks: Watchdog circuits, contactor driver, current sensors, can-
bus interface.
Continuous diagnosis that checks: Temperature of the inverter, motor temperature.
Diagnosis is provided in two ways. The digital console can be used, which gives a detailed
information about the failure; the failure code is also sent on the Can-Bus.
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OPERATIONAL FEATURES
Features
Speed control.
Optimum behavior an a slope due to the speed feedback:
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The motors speed follows the accelerator, starting a regenerative braking if the speed overtakes
the speed set-point.
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The system can perform an electrical stop on a ramp (the machine is electrically hold on a
slope) for a programmable time.
Electronic differential feature with torque balance between external and internal wheel.
Regenerative release braking based upon deceleration ramps.
Regenerative braking when the accelerator pedal is partially released (deceleration).
Direction inversion with regenerative braking based upon deceleration ramp.
Regenerative braking and direction inversion without contactors: only the main contactor is
present.
Optimum sensitivity at low speeds.
Voltage boost at the start and with overload to obtain more torque (with current control).
Hydraulic steering function:
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The traction inverter sends a "hydraulic steering function" request to the pump inverter on the
can-bus line.
Backing forward and reverse options are available, with the tune and the speed of the function
programmable with Zapi console or buttons on a display.
High efficiency of motor and battery due to high frequency commutations.
Modification of parameters through the programming console or buttons on a display.
Internal hour-meter with values that can be displayed on the console.
Memory of the last five alarms with relative hour-meter and temperature displayed on the console.
Diagnostic function with Zapi console for checking main parameters.
Built in BDI feature.
Flash memory, software downloadable via serial link and via CANBUS.
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