<When used with the FR-A5AP option>
(1) Addition of Pr. 285 "excessive speed deviation detection frequency"
In case the motor speed is increased or decreased due to load, etc. during vector control and can not be
controlled to meet the speed command value, alarm stop occurs (E. OSD).
Excessive speed deviation
Speed command value
Pr. 285 shares the function with Pr. 285 "overspeed detection frequency" of the
inverter's brake sequence function. This function is made valid when vector control is
selected in Pr. 370 "control mode selection".
(2) Addition of Pr. 376 "wire break detection selection"
Alarm stop (E.ECT) occurs if the encoder signal's interruption is detected during orientation, encoder
feedback or vector control.
Wire break detection
0 to 30Hz,
|(Actual speed) - (speed command value) | > (Pr. 285)
Alarm stop occurs if speed
deviation becomes greater than
frequency set in Pr. 285.
Alarm "E.OSD" results in alarm stop.
E.OSD activated timing
Note: When an encoder is connected,
setting "6" in Pr. 52 makes
the running speed monitor
value equivalent to the actual
Convert |(Actual speed) -
(speed command value)|
9999: Not detected
0: Function invalid
1: Function valid