Zapi EPS-AC0 SWs&ENC User Manual page 79

The SLOPE PEAK measurement is the difference between two AD conversions
of the selected potentiometer picked up with 16 msec long interval. The SLOPE
PEAK reading can be converted in a Voltage change (∆V in volts) of the wiper
voltage in an interval 16 msec long, with the formula:
∆V = SLOPE PEAK*5/1024 = Voltage change in Volts in 16 msec
(e.g. When SLOPE PEAK is 61 it means the selected potentiometer, in the
worst case, changes 61*5/1024=0.3 V in 16 msec.).
Obviously the SLOPE PEAK reading must be compared with the threshold for
the STEER SENSOR KO alarm (see 13.1.3.5). The STEER SENSOR KO alarm
may be adjusted (see MAX SP SLOPE 11.4.6.3).
22) TRUCK SPEED
Percentage value. It represents the truck speed represented in percentage of
the full drive speed. It is used for the dynamic numbness (i.e. the steering
sensitivity reduces when the truck speed increases).
23) ENC COUNT AT 360
Voltage value with two digits in the range 0 to +/-5Vdc value. This reading
supplies the encoder counting corresponding to a complete steered wheel
revolution in the range 0 to +/- 5.00Vdc. At rest it assumes a 5Vdc value, after a
first valid falling edge on the straight ahead sensor it switches from 5Vdc to
0Vdc. After a second valid falling edge on the straight ahead sensor it switches
to an intermediate value (between 0Vdc and +/-5Vdc) corresponding to the
encoder counting for a full steered wheel revolution. See also 10.5 and 10.6.
This reading may be manually saved on the adjustments SET ENC AT 360 (see
11.4.2.15).
24) ENC COUNT AT 180
Voltage value with two digits in the range 0 to +/-5Vdc value. This reading
supplies the encoder counting corresponding to a quasi-half steered wheel
revolution (measured between the first and the seconds end of the iron plate in
figure 4-4- and 4-5) in the range 0 to +/- 5.00Vdc. At rest it assumes a 5Vdc
value, after a first valid falling edge on the straight ahead sensor it switches from
5Vdc to 0Vdc. After a second valid falling edge on the straight ahead sensor it
switches to an intermediate value (between 0Vdc and +/-5Vdc) corresponding to
the encoder counting for a side to side iron plate rotation. See also 10.5 and
10.6. This reading may be manually saved on the adjustments SET ENC AT
180 (see 11.4.2.16).
ENC COUNT AT 180 is expected being about a half of the ENC COUNT AT
360.
AEMZP0EA - EPS-AC0 SWs&ENC - User Manual Page - 79/95