KEB COMBIVERT F5 Operation Manual page 100

Drive Faults
Error/Message Alt.
(NUM)
Error Over- EOS
speed (58)
100
/ Description
The internal
overspeed limit is
exceeded.
Cause/Solution/Troubleshoot
The inverter internal overspeed is dictated as 110% of
the US06 Contract Speed. This level is fixed and cannot
be adjusted, except for when performing the Overspeed
Test function (refer to parameters LL15, LL16 for further
information).
Possible causes of an overspeed error include:
Incorrect setting of the Machine Data parameters
LN01-03.
The Machine Data parameters are used as a sca-
lar to convert a linear speed (e.g. ft/min) to a rotary
speed (rpm) used by the inverter. If the machine
data is not set correctly, the overspeed limit may be
calculated too low when control modes which dic-
tate the drive speed exceed this limit (e.g. it is possi-
ble in Serial Speed control mode for the controller to
command a speed higher than the overspeed error
limit calculated from the machine data parameters,
which could cause inadvertent overspeed errors).
Lack of control
Maximum Torque limit or peak inverter current
reached.
Monitor the motor current to see if it reaches a
current corresponding to the LC30 Maximum
Torque or the drive Peak Current rating.
Maximum Torque may be set too low (default =
150%; Typical for high speed/full load operation
= 200-250%)
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