Confirmation Of Pg's Rotational Direction; Pg Disconnection Detection Function - Toshiba TOSVERT VF-AS1 Instruction Manual

4.1.5.Confirmation of PG's rotational direction

PG's connection in A and B phases and rotational direction of motor can be confirmed as fol-
lows.
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) = 53 (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 nega-
tive rotation, PG's A/B phase connections and motor wiring are not correct. They must be
corrected.

4.1.6. PG disconnection detection function

* Parameter
Title
f376 Selection of number of PG input phases
f377 PG disconnection detection
* Functions
PG wiring disconnection detection can be confirmed as follows. But the disconnection de-
tection method (f377) is depended on the using encoder type and the wiring method
(f376). Please refer to the table of "Encoder output format and PGFB board interface" of
chapter 3.2 Wiring
Note1) When f377 parameter is changed, it is necessary to turn off the power.
Note2) Even if f377 =1 is set, PG disconnection detection do not work in the following
condition.
>When the drive is stop, it does not work.
>When the operation frequency is less than 4 Hz, it does not work.
>When the drive is deceleration operation, it may not work.
Function Name Adjustment Range
1: Single phase input
2: 2-phase input
0: Deselect
1: Select (with filter)
2: Select (Detection of momen-
tary power failure)
(Keep the inverter off until the LED turns off.)
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Setting at
Shipment
2
0