126 Rockwell Automation Publication 2097-UM002D-EN-P - April 2017
Chapter 7 Troubleshoot the Kinetix 350 Drive
F 43
(1)
Feedback Signal Loss
One or more A/B channel signals from a feedback device are open, shorted,
missing, or severely attenuated. Specifically, the detected voltage levels of
the signals are below the Feedback Signal Loss Factory Limit. The offending
feedback channel is encoded in the associated Fault/Alarm Sub Code.
Disable/Coast
F 45 Feedback Data Loss
The number of consecutive missed or corrupted serial data packets over the
serial data channel from a feedback device has exceeded the Feedback Data
Loss Factory Limit. The offending feedback channel is encoded in the
associated Fault/Alarm Sub Code. The threshold is set at four misses.
Disable/Coast
F 47 Feedback Device Failure
The feedback device has detected an internal error. Stegmann encoders
return an error code and Tamagawa encoders have an error flag.
Disable/Coast
F 50 Hardware Overtravel Positive
Axis that is moved beyond the physical travel limits in the positive direction
and activated the Positive Overtravel limit switch.
Decel/Disable
F 51 Hardware Overtravel Negative
Axis that is moved beyond the physical travel limits in the negative direction
and activated the Negative Overtravel limit switch.
Decel/Disable
F 54
(1)
Excessive Position Error
The Position Error value of the position control loop has exceeded the
configured value for Position Error Tolerance.
Decel/Disable
F 55
(1)
Excessive Velocity Error
The Velocity Error value of the velocity control loop has exceeded the
configured value for Velocity Error Tolerance.
Decel/Disable
F 56 Overtorque Limit
Motor torque has risen above user-defined maximum torque level that is
given by Overtorque Limit.
Decel/Disable
F 57 Undertorque Limit
Motor torque has dropped below user-defined minimum torque level that is
given by Undertorque Limit.
Decel/Disable
F 61 Enable Input Deactivated Enable has been deactivated while the axis is in Running state. Decel/Disable
F 62 Controller Initiated Exception Exception generated specifically by controller. Disable/Coast
(1) When a TTL encoder loses its A/B signals, it is not detected directly. Instead a secondary fault to detect the condition, typically excessive position or velocity error. In this case, the motor coasts to a stop,
but is still be enabled in Logix Designer application.
Table 58 - Drive Behavior, F xx Fault Codes (Continued)
Four-digit Display Exception Description
Best Stopping Method
(Only Major Fault)
IMPORTANT The fault detection ability of TTL encoders is not as advanced as with
Stegmann Hiperface or Tamagawa 17-bit serial encoders. When a TTL
encoder loses its A/B signals, the Kinetix 350 drive is unable to detect this
fault directly. Instead it relies on a secondary fault to detect the condition,
typically excessive position or velocity error. There are some cases,
particularly in Torque mode where the fault isn't detected at all. In this case,
the motor coasts to a stop, but is still enabled in Logix Designer application.
Table 59 - Drive Behavior, Fcxx Custom Fault Codes
Four-digit Display Exception Description
Best Stopping Method
(Only Major Fault)
Fc02 Motor Voltage Mismatch The motor voltage is incompatible with the applied drive voltage. Disable/Coast
Fc05 Feedback Battery Loss
The battery voltage on a battery-backed motor encoder is low enough
such that absolute position is not longer available. This fault occurs when
the battery is too low and encoder main power has been removed.
Decel/Disable
Fc06 Feedback Battery Low
The battery voltage on a battery-backed motor encoder is below a
caution level. This fault occurs when the battery is too low, but main
power has not yet been removed.
Decel/Disable
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