ElmoMC SimplIQ Command Reference - Manual (Page 101)

MF - Motor Failure
Purpose:
Reports the reason why the motor has been automatically shut down (set to MO=0). MF
normally reports zero (as default). The fact that the motor has been automatically shut
down is reflected as a bit in the status register (SR) report, and MF provides the detailed
information.
After a fault, the MF value remains fixed, even if the reason for the fault no longer exists.
MF is automatically set to zero on the next motor enable MO=1.
Fatal faults (CPU exceptions) are permanent and can be resent only be power reset.
The following table lists the type of faults reported by the MF value.
Reported Fault Value Bit
The motor is on, or the last motor shutdown was the normal
result of a software command. 0
1. Resolver or Analog Halls feedback is not ready – Resolver or
Analog Halls angle was not found yet.
2. The amplitude of the analog sensor is lost or too low.
0x1 0
Reserved. 0x1 0
Reserved. 0x2 1
Feedback loss: no match between encoder and Hall location.
Available in encoder + Hall feedback systems. 0x4 2
The peak current has been exceeded. Possible reasons are drive
malfunction or bad tuning of the current controller. 0x8 3
Inhibit. 0x10 4
Reserved. 0x20 5
Two digital Hall sensors were changed at the same time. Error
occurs because digital Hall sensors must be changed one at a
time. 0x40 6
Speed tracking error DV[2] - VX (for UM=2 or UM=4, 5)
exceeded speed error limit ER[2]. This may occur due to:
’
Bad tuning of the speed controller
’ Too tight a speed error tolerance
’ Inability of motor to accelerate to the required speed
due to too low a line voltage or not a powerful enough motor
0x80 7
Position tracking error DV[3] - PX (UM=5) or DV[3] - PY
(UM=4) exceeded position error limit ER[3]. This may occur due
to:
’
Bad tuning of the position or speed controller
’ Too tight a position error tolerance
’ Abnormal motor load, or reaching a mechanical limit
0x100 8
SimplIQ Command Reference Manual Alphabetical Listing
MAN-SIMCR (Ver. 4.5)
3-88