Zapi EPS-AC0 SWs&ENC User Manual page 88

- Remedy:
4) POSITION ERROR
- Cause:
- Remedy:
Page - 88/95
wiper (CPOC1) exits the range from 0.8 Vdc to 4.2 Vdc.
When the twin pot is chosen, the alarm occurs if the sum of the
two wiper voltages (CPOC1+CPOC2) exits the range from 4.5 Vdc
to 5.5 Vdc.
Check the connections of the potentiometer. This alarm occurs
when one connection of the command potentiometer is broken.
CAN Bus Code =228
This alarm occurs for an error in the redundant test of the feedback
sensors. Here we have an encoder and one (two) toggle switches.
This alarm occurs whether the sector (toggle switches
configuration) and the encoder counting are not matched. The
sector is provided with the FEEDBACK SECTOR reading in the
tester menu (see 11.4.7.3); the encoder counting is provided with
the WHEEL ANGLE reading in the tester menu.
In case of two toggle switches:
WHEEL ANGLE
[degrees]
-22 to +22
+23 to +67
+68 to +112
+113 to +157
+158 to -158
-157 to -113
-112 to -68
-67 to -23
In case of one toggle switch:
WHEEL ANGLE
[degrees]
-22 to +22
+23 to +157
+158 to -158
-157 to -23
When the FEEDBACK SECTOR and WHEEL ANGLE don't meet
the above correspondence, an alarm POSTION ERROR occurs in
less than 100msec.
If the alarm occurs when installing a new controller, be sure the
AUX FUNCTION 11 corresponds to the toggle switches
arrangement you have (see 10.3) and SET ENC AT 360 was
correctly set (see 10.4 and 10.5).
If the alarm occurs after the set-up was correctly performed,
search for a failure on a toggle switches or on the encoder.
The troubleshooting consists of comparing WHEEL ANGLE and
FEEDBACK SECTOR when this alarm occurs. In case of an
alarm, they are expected to infringe the admitted correspondences
of the above tables. Then the problem could be in a sensor (check
ENDSTROKE CW and ENDSTROKE ACW) or in the encoder
(check WHEEL ANGLE and FEEDBACK ENC).
A list of possible failures mode follows:
1) A switch changes its level despite it is not engaged by the iron
Admitted
SECTOR
st th
1 or 4
st
1
st nd
1 or 2
nd
2
nd rd
2 or 3
rd
3
rd th
3 or 4
th
4
Admitted
SECTOR
st th
1 or 4
st
1
st nd
1 or 4
nd
4
AEMZP0EA - EPS-AC0 SWs&ENC - User Manual
Admitted
FEEDBACK
SECTOR
3.13V or 1.88V
3.13V
3.13V to 4.39V
4.39V
4.39V or 0.62V
0.62V
0.62V or 1.88V
1.88V
Admitted
FEEDBACK
SECTOR
3.13V or 1.88V
3.13V
3.13V to 1.88V
1.88V