Hitachi L300P Engineering Note page 2

Notes and Precautions
1. Do not use this setting (A85 = 02) on a machine where a constant
acceleration and/or deceleration time is desired.
2. Do not use this setting (A85 = 02) if the load inertia exceeds about 20 times
the motor shaft inertia.
3. Do not use this setting (A85 = 02) if the inverter will increase and decrease
speed frequently, as nuisance trips may occur.
4. Do not use this setting (A85 = 02) if internal or external regenerative braking
is being used.
5. Do not use this setting (A85 = 02) with any of the Vector Control modes
(A44 = 03, 04, or 05). This function is ONLY compatible with V/F Control
modes (A44 = 00, 01, or 02).
6. If the load exceeds the rating of the inverter, the acceleration time may be
increased.
7. If using a motor the capacity of which is one size smaller than the inverter
rating, enable the Overload Restriction function (B21/B24) and set the
Overload Restriction Level (B22/B25) to 1.5 times the motor nameplate
current.
8. Be aware that the acceleration and deceleration times will vary depending on
the actual load conditions that exist during each individual operation of the
inverter.
PGC - 2/13/02
EN-021302-1
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