55
time before the drive automatically foldsback the current limit to 107%. This parameter
adjusts the amount of time the drive must exceed 105% current before foldback is entered.
Armature Current Foldback Status (252, Read-Only)
This status parameter indicates when the drive is in Foldback mode and is limiting the current
output to a maximum of 107%.
Overcurrent Time (253)
At the same time the foldback timer begins, an overcurrent timer also begins counting. If the
drive continually exceeds 105% current for the Overcurrent Time, an overcurrent fault is
generated.
External Fault (490)
This parameter provides an interface for external devices to generate a fault. Typically, a
digital input is used to write to this parameter.
7.29 Fault Log Block
The Elite Pro keeps a log file of the
last 5 faults along with the date and
time. Each time a new fault occurs,
the oldest fault data is lost.
Present Fault Status (255,
Read-Only)
Each of the signals that can
cause a fault are
individually coded with a
hexadecimal weight and
summed (in Fault Logic
Block) to produce the
Present Fault Status
parameter. This parameter
can be examined to determine if there are any
faults currently present. Multiple fault codes sum together. For example, Fault Code 0x0141 is
Phase Lock, Phase Loss, & Field Loss.
Code
Fault
Cause
0x0001
Field Loss
field current feedback < field loss level
0x0002
VFB Loss
loss of feedback signal
0x0004
Over Voltage
armature voltage >120%
0x0008
Over Speed
velocity feedback > overspeed level
0x0010
Over Current
drive exceeded 105% current for timed period
0x0020
Over Temp
heatsink temperature over limit
0x0040
Phase Loss
loss of at least one of the 3 AC line inputs
0x0080
CT ID Error
no CT ID Board installed
0x0100
Phase Lock
phase lock not achieved
0x0200
Thermistor Open
heatsink thermistor open
0x0400
External Fault
external fault present
Table 15: Fault Codes
Latched Fault Status (304, Read-Only)
The signal or signals that generated the fault are latched and stored into this parameter and
the fault log. This is done to help identify the actual cause of the fault.
External Fault Reset (254)
The
External Fault Reset
parameter is typically written to by a digital input and can be used
Figure 50
Summary of Contents for Elite Pro EPN020-000
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