8I20 8
OPERATION
FAULT CONDITIONS
NAME
BIT
FUNCTION
ULOOPCURRENTFAULT
5
U current >125% of MAXCURRENT
VLOOPCURRENTFAULT
6
V current >125% of MAXCURRENT
WLOOPCURRENTFAULT
7
W current >125% of MAXCURRENT
BUSLOVFAULT
8
Low motor voltage fault
BUSHIVFAULT
9
High motor voltage fault (settable)
MAXBUSVFAULT
10
High motor voltage fault (fixed at 400V)
MODULEFAULT
11
Module over temperature or low gate
voltage
OERRFAULT
14
8I20 serial port overrun error
FERRFAULT
15
8I20 serial port framing error
CLEARING FAULTS
Faults can not be cleared by writing the fault register but are cleared by setting the
CLEARFAULT flag. The host must then poll the state of CLEARFAULT until it is zero.
FAULT MASK
Certain faults can be masked so that they do not affect the external fault output.
Currently only the BUSLOVFAULT is maskable. A zero bit in the FAULTMASK register will
mask the corresponding fault bit.