Filter
Top Products
E-11
[Terminal AM-related parameters]
Title Function Adjustment range
Default setting
AM Terminal meter selection
Same as (: disabled)
AM Terminal meter adjustment
Resolution
Both the terminals FM and AM have a maximum resolution of 1/1024.
Calibrating a meter when the inverter is out of operation
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 hte data item selected with the parameter or
. Refer to the table on the next page for the calibration procedure.
Adjustment level:
(a): The output voltage FM/AM-CC reaches 100% at the maximum frequency ().
(b): The output voltage at FM/AM-CC reaches 100% when the reading on the control panel is 150%.
(c): The output voltage at FM/AM-CC reaches 100% when the reading on the control panel is 100%.
(d): Special output (Refer to the instruction manual for the applicable device.)
(e): The output voltage at FM/AM-CC reaches 100% when the electric power is
3 200V(400V) (inverter rated current).
[Example of the calibration of the frequency meter connected to the terminal FM-CC]
*Before proceeding to calibration, make the zero-adjustment of the meter itself.
Key operated, LED display Operation
The running frequency is displayed.(If the monitor display
mode setting is set at [Running frequency])
Press the MON key to call up the first basic parameter
(automatic acceleration/deceleration).
Select by pressing the or key.
Press the Enter key to display the running frequency.
Adjust the meter by pressing the or key.
Note that the meter reading varies during adjustment,
though the reading in the digital LED (monitor) on the
control panel does not change.
By setup, before the needle of meter begins to sway,
it will take time.
Press the Enter key to terminate the meter calibration.
Then, and the running frequency are displayed
alternately.
Press the Monitor key to return to the running frequency
display mode.(If the monitor display mode setting parameter
is set at [Running frequency])
For meter connection, the VF-A7 inverter has two output terminals; FM and AM,
which can be used simultaneously.
ENT
ENT
MON
MON
[Point] Holding down the key for several
seconds facilitates this adjustment.
With the default settings, FM terminal outputs about 16 V (external impedance is
infinity) or about 3mA (external impedance is 0 ohm), when running frequency
is 80Hz. AM terminal outputs about 16 V or about 3mA, when the output current
reading on the control panel is 150%