Zapi EPS-AC, Руководство по эксплуатации и инструкция пользователя, Страница: 20 / 52

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7 ONE SHOT INSTALLATION PROCEDURE
This section of the manual describes the connection procedure for the tacho-generator,
the potentiometer and the motor.
Step 1 - STEERING WHEEL (COMMAND) DEVICE CONNECTIONS
Connect the two wires from the tacho-generator (or the two stepper motor lines) so that
clockwise rotation of the steering wheel produces an increasing (higher positive)
command value. This may be measured in two ways. Using the ZAPI hand held
controller see the TESTER MENU' (see 10.6.1). The second way, (valid only for a
tacho-generator application) is to use a DC voltmeter on the +DT (Pin #9 of CNB
connector) and the minus terminal on the battery.
Step 2 - STEERING ANGLE FEEDBACK POT. CONNECTION
a) The steer angle feedback pot. has 3 wires: two end wires and a wiper wire. If the
truck has a not leading MDU (Motor Drive Unit - see figure 7.1)* connect the two end
wires to Pin #1 and #2 of connector CNA so when the Drive Unit is turned Counter-
Clockwise (Clockwise for a truck with a leading MDU) the value on the wiper is
increasing. This value may be measured in two ways. Use the Zapi hand held controller
through the TESTER MENU' (see 10.6.3). The second way is to use a DC voltmeter
connected to the steering angle feedback pot. wiper and battery negative. The wiper
should be connected to Pin # 11 of connector CNA.
* Not leading MDU : means the steering-traction wheel is opposite to the driving seat.
When the steering handle is turned clockwise, the MDU turns counterclockwise.
Leading MDU : means the steering traction wheel is on the same side of the driving seat. When the steering
handle is turned clockwise, the MDU turns clockwise too.
b) Physically adjust the steering angle feedback potentiometer so with the Drive Unit
straight ahead, the wiper voltage is 2.5Vdc. The Zero Point for the steering angle
feedback pot. can be adjusted using the ZAPI hand held controller. See the CONFIG
MENU' (see. 10.8.1).
Step 3 - STEER MOTOR CONNECTIONS
Connect the three steering motor wires so that a Clockwise steering wheel movement
causes a Counter-Clockwise steer movement, for a not leading MDU truck, or a
Clockwise steer movement, for a leading MDU truck. If this operation is carried out
correctly, the truck will turn Clockwise when the steering wheel is moved Clockwise
while the truck is travelling in frontal direction (with respect to the driving seat).
Step 4 - LIMIT SWITCHES CONNECTION
After completing Steps 1 - 3, check that the limit switch connected to Pin #12 of
connector CNB stops steering in the handwheel clockwise direction. Then, check that
the limit switch connected to Pin # 6 stops steering in the Counter_Clockwise direction.