Monitoring Method For Feedback Amount - Toshiba TOSVERT VF-AS1 Instruction Manual

The motor constant parameter (f405 to f413) requires setting according to the motor
used.
For details, refer to the inverter manual.
(1) The PG number of input pulses (f375) is the number of encoder output pulses per
one motor rotation.
(2) For PG input phase number selection (f376), set as follows:
If the encoder pulse is single-phase: 1
If the encoder pulse is two-phase (Phase A and Phase B signal): 2
When the settings for the above (1) and (2) are wrong, the motor rotation will become
abnormal.
(3) Even though when setting up the PG disconnection detection f377=2 (Select (De-
tection of momentary power failure, hardware detection)), if the Selection of number of
PG input phases f376=1(single phase), the detection method is same as
f377=1 (software detection).
When f377 parameter is changed, it is necessary to turn off the power.

4.1.4.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) and (2) for motor speed monitoring.
(1) Speed feedback (real-time value) (Unit: Hz/free unit)
(2) Speed feedback (one-second filter) (Unit: Hz/free unit)
The monitoring for the above (1) and (2) is possible also in cases except for pt= 7, 8 * (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).
* This function is reserved in VF-PS1.
<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.
The real-time display of motor speed can be made (Monitor display setting: 53).
The filtered motor speed (feedback value) is displayed. (Monitor display setting: 54).
(Keep the inverter off until the LED turns off.)
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