User guide

CME 2 User Guide Faults
Copley Controls 89
9.2: Fault Latching Notes
9.2.1: Clearing Non-Latched Faults
The amplifier clears a non-latched fault, without operator intervention, as soon as the fault
condition is corrected.
!
DANGER
Risk of unexpected motion with non-latched faults.
After the cause of a non-latched fault is corrected, the amplifier re-enables the PWM
output stage without operator intervention. In this case, motion may re-start
unexpectedly. Configure faults as latched unless a specific situation calls for non-
latched behavior. When using non-latched faults, be sure to safeguard against
unexpected motion.
Failure to heed this warning can cause equipment damage, injury, or death.
9.2.2: Clearing Latched Faults
A latched fault is cleared only after the fault has been corrected and at least one of the
following actions has been taken:
 Power-cycle the amplifier
 Cycle (disable and then enable) an enable input that is configured as
Enables with Clear Faults or Enables with Reset
 Access the CME 2 Control Panel and press Clear Faults or Reset
 Clear the fault over the CANopen network or serial bus
9.2.3: Example: Non-Latched vs. Latched Faults
For example, the amplifier temperature reaches the fault temperature level and the
amplifier reports the fault and disables the PWM output. Then, the amplifier temperature
is brought back into operating range. If the Amp Over Temperature fault is not latched,
the fault is automatically cleared and the amplifier’s PWM outputs are enabled. If the fault
is latched, the fault remains active and the amplifier’s PWM outputs remain disabled until
the faults are specifically cleared (as described above).