Toshiba TOSVERT VF-AS3 Instruction Manual page 22

3. 1. 2
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 feed-
3
back 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 parameter ([FMSL], [FM]).
Refer to Meter Setting and Calibration section of the inverter manual.
3. 1. 3
9
PG's connection in A and B phases 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 control selected] = "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 PG input is determined positive turn 3Hz, "3.0" is displayed. When it is
determined negative turn 3.0Hz, "-3.0" is displayed. When determined negative rotation, PG's
A/B phase connections and motor wiring are not correct. They must be corrected.
3. Functional Description
Monitoring method for feedback amount
Confirmation of PG's rotational direction
3-4
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