Toshiba TOSVERT VF-AS1 Instruction Manual page 94

[Terminal AM-related parameters]
Title
AM terminal meter selection
AM terminal meter
adjustment
AM output gradient
characteristic
AM bias adjustment
Resolution
Both the terminals FM and AM have a maximum resolution of 1/1024.
With the default settings, FM terminal outputs about 10V (external impedance is • ‡ ) or about 1mA (external
impedance is 0Ω), when running frequency is 80Hz. AM terminal outputs about 10V or about 1mA, when the
output current reading on the operation panel is 185%.
[Example of the calibration of the frequency meter connected to the terminal FM]
* Use the meter's adjustment screw to pre-adjust zero-point.
Key operated
5
For meter connection, the VF-AS1 inverter has two output terminals; FM and AM, which can be used
simultaneously.
Meter adjustment 1 when the inverter is at rest (adjustment by setting
: Fixed output 2,
If it is difficult to calibrate a meter because of large fluctuations of its reading, you may put the inverter out of
operation to make its calibration easier.
It is possible to adjust the meter for the data item selected with the parameter
levels (a) through (d) shown in the table on the previous page change according to the settings of fixed outputs 1
through 3, as shown in the table below. Use this table as a reference when calibrating the meter(s).
Values adjusted with fixed outputs are put out from the FM (AM) terminal when values in the table are used for
operation. For examples of adjustments, see the next page.
Fixed output 1 comes in handy for adjusting items at adjustment level (a) or (c).
Fixed output 2 comes in handy for adjusting items at adjustment level (b).
Fixed output 3 comes in handy for adjusting items at adjustment level (d).
Function
Same as
–
:Negative gradient (downward-sloping),
:Positive gradient (upward-sloping)
–
LED display
–
MODE
ENT
ENT ⇔
MODE
: Fixed output 3)
Adjustment range
( :AM output disabled)
~ %
Displays the operation frequency.
(When standard monitor display selection
The first basic parameter "History function (
Press either the or key to select "
Press the ENTER key to display the operation frequency.
Press either the key or the
The meter reading will change at this time but be careful because there will
be no change in the inverter's digital LED (monitor) indication.
By setup, before the needle of meter beings to sway, it will take time.
The adjustment is complete.
alternately.
The display returns to its original indications.
(When standard monitor display selection
E-28
Default setting
Operation
= [Output frequency])
)" is displayed.
."
key to adjust the meter.
[Hint]
It's easier to make the
adjustment if you push and
hold for several seconds.
and the frequency are displayed
= [Output frequency])
( ) to : Fixed output 1,
or . Adjustment
E6581301
–