Meter Setting And Adjustment - Toshiba TOSVERT VF-AS1 Instruction Manual

5.16

Meter setting and adjustment

 : FM terminal meter selection

 : FM voltage/current output switching
 : Inclination characteristic of FM output
 : FM bias adjustment
 : AM terminal meter selection

 : Inclination characteristic of AM output
 : AM bias adjustment
• Function
The signal output from the FM and AM terminal is an analog voltage signal. (positive (+) side output. For signed
data, an absolute value is output. To output data with positive and negative sings, you need to use two extended
terminal boards (optional).)
For the meter, use either a full-scale 0-1mAdc ammeter or full-scale 0-7.5Vdc (or 10Vdc) voltmeter. To the AM
terminal, connect a full-scale 0-1mAdc ammeter. Note that the FM terminal can be switched to a 0-20mAdc (4-
20mAdc) current output terminal by turning on the SW2 switch and changing the setting of f681. The output
5
current can also be changed to 4-20mAdc, using the parameters f682, f683.
To calibrate the meter connected to the terminal FM or AM, use the FM terminal meter adjustment  or the AM
terminal meter adjustment  respectively.
Connect meters as shown below.
<Connection to terminal FM>
VF-AS1
A frequency meter QS60T is optionally available.
: FM terminal meter adjustment
: AM terminal meter adjustment
Meter: Frequency meter
(default setting)
+
FM
-
CC
The reading of the
frequency meter
fluctuates during
calibration.
<Connection to terminal AM>
AM
VF-AS1
CC
Make the maximum ammeter scale at least 150% of
theinverter's rated output current.
E-26
E6581301
Meter: Ammeter
(default setting)
+
-
The reading of the
ammeter fluctuates
during calibration.