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E6582171
3.1.2 Monitoring method for feedback amount
Motor rotation speed can be monitored.
The motor is equipped with status monitor which is displayed on the panel and analog monitor which used analog
output terminals ([FM], [AM] terminals)
Set items (1) or (2) for motor speed monitoring.
(1) Speed feedback (real-time value) with sign(+/-) (Unit: Hz/free unit)
The real-time display of motor speed can be made (Monitor display setting: “153”).
(2) Speed feedback (one-second filter) with sign(+/-) (Unit: Hz/free unit)
The filtered motor speed (feedback value) is displayed. (Monitor display setting: “154”).
The monitoring for the above (1) or (2) is possible also in cases except for <Pt> = “10, 11, 12 (PG feedback vector
control operation)”. For example, the monitoring can be used for confirmation of the initial PG feedback amount in
open loop (V/f operation and the like).
<Setting method for status monitoring>
In order to monitor motor rotation speed in condition monitoring, it is necessary to change the setting for extended
parameters (<F710> to <F718>).
Refer to Monitoring Operating Condition section of the inverter manual.
<Setting method for analog monitoring>
In order to monitor motor rotation speed by the analog output terminal, it is necessary to change the setting for basic
parameters (<FMSL>, <FM>).
Refer to Meter Setting and Calibration section of the inverter manual.
3.1.3 Confirmation of resolver's rotational direction
Resolver’s connection in Sin, Cos waves and rotational direction of motor can be confirmed as follows.
Set the parameters changed back to the original values following confirming the rotational direction.
(1) Set parameter <Pt: V/f pattern> = “0: constant torque characteristics”.
(2) Set parameter <F711: status monitor 1 display selected> = “153: Signed speed feedback (real-time value)”.
(3) Enter an operating command for positive rotation and command frequency of 1-10Hz to the inverter.
(4) Confirm the motor be turning in the positive direction.
(5) Display status monitor “1” by using the status monitor indication of inverter.
(6) Monitor display, when resolver signal input is determined positive turn 3Hz, “+3.0” is indicated into the display.
When it is determined negative turn 3.0Hz, “-3.0” is indicated. When determined negative rotation, resolver's
Sin, Cos waves connections and motor wiring are not correct. They must be corrected.
3.1.4 Abnormal speed detection function
■ Parameter
Table 3-4. Parameters for abnormal speed detection
Title Function Name Adjustment Range Default Setting
F622 Abnormal speed detection time 0.01 – 100.00sec 0.01
F623 Abnormal speed increase band 0.0: Disabled, 0.01 – 30.00Hz 0.00
F624 Abnormal speed decrease band 0.0: Disabled, 0.01 – 30.00Hz 0.00
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