ElmoMC SimplIQ Software Manual - Manual (Page 204)

SimplIQ Software Manual Limits, Protections, Faults and Diagnosis
MAN-SIMSW (Ver. 1.4)
13-9
The motor will not start if the voltage of the power supply is not within range, if the
servo drive temperature is too high, or if an active switch prevents motor on. The MO
command returns error code 65 or 66. The failure reason may be read through the status
(SR command) report. If the voltage is in range and the temperature is not excessive, the
drive will attempt to start the motor.
13.8 Motion Faults
Error conditions may cause the drive to automatically shut down the motor, at which
time:
ƒ
The MO variable is set to zero.
ƒ The MF variable is set to reflect the reason for shutdown.
ƒ A flag in the status register (SR command) indicates that the motion has been
aborted.
ƒ The next “Motor enable” (MO=1) is permitted after 150 sample times (TS).
The MF variable may reveal the reason for motor shutdown even if the reason no longer
exists. For example, if the power supply has too large an impedance, its voltage may drop
in full load and the servo drive will be automatically shut down due to under-voltage.
When the motor is shut down, the under-voltage disappears. On the other hand, if an
over-voltage is generated due to an insufficient shunt, the over-voltage will disappear
when the motor is shut down.
The over- or under-voltage conditions that caused the fault are captured in the MF
variable.
Notes:
ƒ MF is reset automatically every “Motor enable” (MO=1) when the fault is no
longer valid.
ƒ The SR variable also reports motor faults, according to the current status of the
drive/motor. When the fault is no longer valid, the indication is removed. For
example, if an “Over-voltage” occurs, SP indicates the fault and MF latches the
fault indication. As soon as the over-voltage conditions end, the fault indication
is removed from SR. The “Fault latch” indication in the SR remains set (bit 6)
and MF indicates “Over-voltage” until the next MO=1.
ƒ When the drive shuts down by exception, the motor continues to run on its own
inertia unless brakes are used (refer to
section 13.6 ).
A drive exception shutdown can be captured and reacted to by placing an AUTO_ER
routine in the user program.
For a full list of the exceptions that can cause automatic shutdown, refer to the MF
command section in the
SimplIQ Command Reference Manual.