Mitsubishi Electric FR-A700 Technical Manual page 322

2.15.4 Terminal FM, AM calibration [C0 (Pr. 900), C1 (Pr. 901)*]
By operation panel or parameter unit, terminal FM and terminal AM in
[Pr. ] Name
C0(900)
FM terminal calibration
*1
AM terminal calibration
C1(901)
*1 The setting is available for
*2 The above parameters allow its setting to be changed during operation in any operation mode even if [Pr. 77 Parameter write
selection = 0] (initial value).
(1) FM terminal calibration [C0(Pr. 900)]
common
When using
A700
F700 E700 D700
output. By setting the calibration parameter [C0 (Pr.
900)], the meter connected to the inverter can be
calibrated without using a calibration resistor.
T1
8VDC
Pulse width T1: Adjust using calibration parameter [C0 (Pr.900) ]
Pulse cycle T2: Set with [Pr. 55] (frequency monitor)
Set with [Pr. 56] (current monitor)
1mA
FM
Calibration
resistor
*1
SD
*1 It is not necessary when the operation panel (FR-
DU07) or parameter unit (FR-PU04/FR-PU07) is
used for calibration.
Used when calibration must be made near the
frequency meter for such a reason as a remote
frequency meter.
However, the frequency meter needle may not
deflect to full-scale if the calibration resistor is
connected. In this case, use this resistor and
perform calibration of operation panel or parameter
unit.
Connect an indicator/frequency meter (moving-coil
type DC ammeter 1mA) across terminals FM-SD of
the inverter. (Note the polarity. The terminal FM is
positive.)
Set the monitor description in [Pr. 54] and operate the
inverter. (It is not necessary to connect the motor.)
Initial Setting
Value Range
— —
— —
when it has built-in option FR-A7AY installed.
E700
with [Pr. 291 = 0, 1] and for
, terminal FM is preset to FM
T2
Indicator
1mA full-scale
analog meter
( ) (
)
(*[C1 (Pr. 901)] is not available for
A700
Description
Calibrates the scale of the meter connected to terminal FM.
Calibrates the scale of the analog meter connected to terminal AM.
Read [C0] and turn
The average value of the output voltage will change,
enabling
calibrated. When calibrating a monitor output signal,
which cannot be adjusted to a 100% value without an
actual load and a measurement equipment, set [Pr.
54 = 21] (reference voltage output) and make
calibration. When monitoring the frequency, the FM
terminal output is filled to capacity at the initial value if
the maximum output frequency reaches or exceeds
100Hz. In this case, the [Pr. 55] setting has to be
changed to the maximum frequency.
Using the FM output of the terminal FM, a digital
display can be provided to connect a digital counter.
The monitor value is 1440 pulse/s output at the full-
scale value of monitor description list (page 346) (Pr.
54 FM terminal function selection). Change the
reference value of [Pr. 55, Pr. 56, Pr. 866] to change
the number of pulses at full scale value. ([Pr. 866 ] is
available for only
356
common
(common)
can be calibrated to full scale.
F700
to change the pulse width.
the indicator/frequency
.)
A700
(Digital indicator)
1440 pulse/s (+)
FM
SD
PARAMETER
.)
D700
Available
Inverters
A700
F700 D700
E700
—
meter to be
(-)