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5. PARAMETERS
5.7 (H) Protective function parameter
5.7.14 Motor overspeeding detection
The Overspeed occurrence (E.OS) is activated when the motor speed exceeds the overspeed detection level. This function
prevents the motor from accidentally speeding over the specified value, due to an error in parameter setting, etc.
*1 The maximum motor frequency is set in Pr.702 Maximum motor frequency. When Pr.702 = "9999" (initial value), the Pr.84 Rated motor
frequency setting is applied as the maximum motor frequency.
Pr. Name Initial value Setting
range
Description
374
H800
Overspeed detection level 9999 0 to 590 Hz If the motor rotation speed exceeds the speed set in Pr.374
during PM motor control, Overspeed occurrence (E.OS)
occurs, and the inverter output is shut off.
9999 During PM motor control, E.OS occurs when the speed
exceeds the "maximum motor frequency + 10 Hz".
*1
ALM
Motor speed
Time
E.OS
Coast to stop
ON
Pr.374
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