Acceleration/Deceleration Is Not Smooth; Motor Current Is Large; Speed Does Not Increase; Speed Varies During Operation - Mitsubishi FR-E520-0.1KN Instruction Manual

5.2.4 Acceleration/deceleration is not smooth

$ Check that the acceleration and deceleration time settings are not too short.
$ Check that the load is not too heavy.
$ Check that the torque boost setting is not too large to activate the stall prevention
function.

5.2.5 Motor current is large

$ Check that the load is not too heavy.
$ Check that the torque boost setting is not too large.

5.2.6 Speed does not increase

$ Check that the maximum frequency setting is correct.
$ Check that the load is not too heavy. (In agitators, etc., load may become heavier
in winter.)
$ Check that the torque boost setting is not too large to activate the stall prevention
function.
$ Check that the brake resistor is not connected to terminals P-P1 accidentally.

5.2.7 Speed varies during operation

When slip compensation is selected, the output frequency varies with load fluctuation
between 0 and 2Hz. This is a normal operation and is not a fault.
1) Inspection of load
$ Check that the load is not varying.
2) Inspection of input signal
$ Check that the frequency setting signal is not varying.
$ Check that the frequency setting signal is not affected by noise.
3) Others
$ Check that the setting of the applied motor capacity (Pr. 80) is correct for the
inverter and motor capacities in general-purpose magnetic flux vector control.
$ Check that the wiring length is within 30m in general-purpose magnetic flux
vector control.
$ Check that the wiring length is correct in V/F control.
PROTECTIVE FUNCTIONS
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