Zapi 4Q - Operating Functions; Controller Diagnosis

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1.4 OPERATING FUNCTIONS
- Speed control.
- Excellent sensitivity at low speeds.
- Maximum speed reduction: the maximum speed in both directions can be adjusted
using the programming console.
- Regenerative braking based on deceleration ramps, release braking, inversion
braking.
- Speed control in descent: the motor speed is controlled by the accelerator pedal and
regenerative braking is activated automatically if the motor speed exceeds the
required speed; this results in excellent ramp performance.
- Even without the use of an electric brake anti roll-back.
- Electric brake control (optional).
- Diagnosis with optional led to indicate type of fault.
- Parameter adjustment using console.
- Internal hour-counter, displayed on the console.
- The last 5 alarms are recorded together with the relative hour-counter reading and
chopper temperature.
- Tester function using the console to check in real time: inputs, motor voltage, battery,
etc.
- Good motor and battery efficiency thanks to high frequency switching.
- Watchdog circuit to check the µC operations.
- An MDI indicator can be connected to display: software version, hour counter,
alarms, speed reduction and battery charge.
1.5 CONTROLLER DIAGNOSIS
The µC diagnoses the main chopper functions.
Diagnosis consists of 4 main stages and includes the following tests:
1) Key turned on: test current sensor, test VMN, test main relay, test presence of start
command, test accelerator high, test potentiometer connection, test watchdog, test
power devices.
2) At rest: test VMN, test main relay, test current sensor, test potentiometer
connection, test watchdog, test accelerator up in absence of start microswitch.
3) Running: test VMN, test main relay, test current sensor, test negative wire of
potentiometer, test watchdog, test electric brake (if configured).
4) Permanent: check temperature and battery voltage.
Diagnostic messages are coded by counting the number of times the led flashes or by a
2 digit code on the MDI.
The full alarm message can be visualised using the programming console.