18
BIPOLAR ANALOG OUTPUT
4.3.2 Calibration of the indicator (Pr. 838, Pr. 857, C0)
Refer to the following flow chart to calibrate the indicator.
CAUTION
⋅
If calibration is porformed without setting "21" (reference voltage output) in
Pr. 838
, terminal FM of the
inverter is calibrated.
⋅
When FR-A7AZ is remounted on other inverter, use
Pr. 857
and
C0 (Pr. 900)
of the inverter with the option to
calibrate again.
⋅
When FR-A7AZ and FR-A7AY are used together with "1 or 11" set in
Pr. 309 Analog output signal voltage/current
switchover
and "21" set in
Pr. 310 Analog meter voltage output selection
,
C0 (Pr. 900)
calibrates terminal AM0 of the
FR-A7AY. (
Pr. 309
and
Pr. 310
are parameters for FR-A7AY. Refer to
the Instruction Manual of the FR-A7AY
for
details of
Pr. 309
and
Pr. 310
.)
At this time, check that the polarity is correct. Terminal DA1 is plus.
Turn to adjust the indicator needle to deflect to full-scale,
then press to set.
If the inverter is at a stop, (press the or ) to start the inverter.
(Motor needs not be connected.)
Setting "21" in
Pr. 838
outputs 10VDC to deflect the indicator needle.
If the indicator needle does not point to 0 when voltage output is 0,
adjust the setting value of
Pr. 857
DA1 0V adjustment
in between 900%
and 1100%.
Start
Run the inverter
Use
C0 (Pr. 900)
to make adjustment, then set.
End
Connect the indicator across terminals DA1
and terminal 5.
Use
Pr. 857
to make calibration of indicator at
0 voltage.
Set "21" (reference voltage output) in
Pr. 838
.
Use
Pr. 838
to set the types of the signals to be monitored.
(Refer to page 19.)
