User Manual V 1-4.XX User guide

Control Block Diagrams B-29
The SpdFdbk Loss Fault
SpdFdbk Loss is a configurable fault controlled through bit 0 of Fault
Select 2 and Warning Select 2. You can only get a SpdFdbk Loss
fault/warning if you have an encoder on your system, which is
indicated when Fdbk Device Type (parameter 64) is set to 2. A
SpdFdbk Loss fault/warning occurs when the hardware detects a loss
of encoder input. This can occur for two reasons:
The Mtr Stall Fault
Mtr Stall is a configurable fault controlled through bit 5 of Fault
Select 2 and Warning Select 2. A Mtr Stall fault occurs when the
motor is not running (zero speed) and the drive is in a limit condition
(the drive is putting out maximum torque, current, or power).
You can use Motor Stall Time (parameter 25) to enter the length of
time that the drive must be in current limit and at zero speed before
the drive indicates a Mtr Stall fault.
The MtrOvrld Pnd and MtrOvrld Trp Faults (I
2
T)
MtrOvld Pnd and MtrOvld Trp are configurable faults controlled
through bits 3 and 4 of Fault Select 2 and Warning Select 2. The faults
are generated when points are reached on the motor overload curve.
You can use Service Factor (parameter 9) and Motor Overload %
(parameter 26) to change the curve.
This type of
loss:
Occurs when:
Quadrature
There is a loss of quadrature. The most likely cause is a high level of
noise on one or both encoder channels.
Phase
The hardware detects that any of four wires (A, A NOT, B, B NOT) is
missing.
file:
Monitor
group:
Drive/Inv Status
This condition: Is indicated by:
The motor is not running
Bit 12 in Drive/Inv Status (parameter 15)
being set.
The drive is in a limit condition
Torque Limit Sts (parameter 87) having a
value other than 0.
file:
Fault Setup
group:
Fault Limits
The following curves do not apply to the H frame. Information for
the H frame is not available at the time of printing.