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- Cause: It occurs two ways:
a) In steady state condition, when the main uC finds the safety
contact controlled by the slave uC has been opened, but no alarm
information has been communicated from the slave uC to justify
the opening of the safety contact.
b) at key on, when the main uC has closed its own safety contact,
it grants the local status bus to the slave uC that is expected to
change properly the status bus configuration within 300msec. In
case it doesn’t, this alarm occurs.
- Remedy: It is necessary to replace the controller.
4) MICRO SLAVE #8
CAN Bus Code = 212
- Cause: It occurs when the encoder counting of the main uC is not matched
with the encoder counting of the slave uC.
- Remedy: It is necessary to replace the controller.
5) INPUT ERROR #1
CAN Bus Code = 99
- Cause: It occurs when the voltage on CNA#4 (NK1: Lower Potential
Terminal of the Safety Contacts (see 6.6) is higher than 12 V
before to turn the safety contacts closed.
- Remedy: When the safety contacts are open, the voltage on CNA#4 is
expected to be close to 0 Vdc and this is independent from
whether the safety contacts are connected to a plus battery or to a
minus battery (see 6.6). In the first case (safety contacts
connected to a plus battery), when the safety contacts are open,
CNA#4 is connected to a minus battery through a load. Only a
harness mistake may connect NK1 to a higher than 12 V voltage.
6) SERIAL ERR #1
CAN Bus Code = 6
- Cause: Main uC and Slave uC communicate via a local serial interface.
This alarm occurs when the slave uC does not receive the
communication from the main uC through this serial interface.
- Remedy: It is necessary to replace the controller.
7) SLAVE COM. ERROR
CAN Bus Code = 227
- Cause: Main uC and Slave uC communicate via a local serial interface.
This alarm occurs when the main uC does not receive the
communication from the slave uC through this serial interface.
- Remedy: It is necessary to replace the controller.
8) NO SYNC
CAN Bus Code = 226
- Cause: Every 16msec, inside the code cycle, the main uC rises and then
lowers an input for the slave uC (SYNC). When the slave uC
detects no edge for more than 100 msec on this input, this alarm
occurs. This is just a watch dog function: when the main uC does
not execute the code cycle it does not update the SYNC signal and
the slave uC cuts off the steer and traction.
- Remedy: It is necessary to replace the controller.
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