Zapi EPS-AC, Operating And Users Manual, Page: 33 / 52

Page 33
10.6 MAIN MENU: "TESTER" FUNCTIONS LIST
The TESTER functions list is common for applications with or without the automatic
centering model. Each TESTER function provides the measurement, executed by the
software, of the specified parameter. Descriptions of each TESTER function are given
below.
1) DT
Provides the value of the tacho-generator (or stepper motor) input from the steering
wheel with its sign in real time. The value is scaled for the CPU A/D converter
(range 0±5Vdc). The value measured directly on the tacho-generator output is
sometimes higher than measured on the hand set.
2) SET POINT POT
Not used. Pot steering only. It provides the steering handle command potentiometer
voltage in real time (i.e. the voltage on the Pin #20 of CNA connector)(for two pots
closed loop position control only).
3) FEEDBACK POT
Provides the MDU steer angle feedback potentiometer voltage in real time. A steer
angle straight ahead corresponds to about 2.5Vdc.
4) TEMPERATURE
Provides in real time the control unit plate temperature in celsius degrees. An alarm
occurs when the temperature is above 76 degrees Celsius.
5) FREQUENCY
Provides in real time the frequency applied to the steering motor with its sign.
6) MOTOR VOLTAGE
Provides in real time the voltage applied to the steering motor as a percentage of
the battery voltage.
7) MOTOR CURRENT
Provides in real time the phase motor current (Rms).
8) ENC
Not used. It's for the optional encoder.
9) ENC SPEED
Not used. It's for the optional encoder. This reading (and the previous) was
introduced to read the optional encoder speed and position. At present it's not
managed.
10) ENDSTROKE CW
Provides in real time the active state (ON) or not of the Clockwise (Right) limit
switch.
11) ENDSTROKE ACW
it provides in real time the active state (ON) or not of the Anti_Clockwise (Left) limit
switch.