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14 EPS-AC0 ALARMS LIST
The ALARMS logbook in the MAIN MENU records the alarms of the controller. It has
a FIFO (First Input First Output) structure that means the oldest alarm is lost when
the database is full and a new alarm occurs. The logbook is composed of five
locations getting possible to stack five different types of alarms with the following
information:
1) The alarm code
2) The times that each alarm occurs consecutively
3) The Hour Meter value when the latest event of every alarm occurred
4) The inverter temperature when the latest event of every alarm occurred.
This function permits a deeper diagnosis of problems as the recent history can be
revisited.
The CAN Bus code is the corresponding number with which the alarm is signalled
on the CAN Bus (ID 0x298h).
14.1 Main menu “ALARMS” list
To Enter the MAIN MENU push the Enter button at the Home Page of the hand set
display and Roll for the ALARMS item. Here is the ALARMS list:
14.1.1 One Blink Alarms
1) MICRO SLAVE KO
CAN Bus Code = 246
- Cause: In stepper motor application, this alarm occurs if the main uC is
detecting a direction of the stepper motor not matched with the one
that the slave uC is detecting.
In closed loop application, this alarm occurs if the main uC is
detecting a direction of the steering error not matched with the one
that the slave uC is detecting.
Furthermore, this alarm occurs also if the main uC is detecting no
steering limitation meanwhile the slave uC is detecting e steering
limitation.
- Remedy: It is necessary to replace the controller.
2) MICRO SLAVE #4
CAN Bus Code = 221
- Cause: It occurs in one of the following conditions:
(Open loop application only) If the slave uC detects the stator
voltage phasor rotates in the opposite direction respect to the sign
of the stepper motor speed, this alarm occurs.
(Closed loop application only) If the slave uC detects the stator
voltage phasor rotates in the opposite direction respect to the
commanded position, this alarm occurs.
- Remedy: It is necessary to replace the controller.
3) MICRO SLAVE
CAN Bus Code = 250
- Cause: It occurs when the information on the status bus between the main
uC and the slave uC is frozen to the 0xFF value (the slave uC
does not update the status bus configuration).
- Remedy: It is necessary to replace the controller.
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