Meter (Frequency Meter) Calibration (Pr. 900) (200V Class, 100V Class) - Mitsubishi Electric FR-E500 Instruction Manual

4.2.49 Meter (frequency meter) calibration (Pr. 900)
(200V class, 100V class)
Pr. 900 "FM terminal calibration"
z By using the control panel or parameter unit, you can calibrate a meter connected to
terminal FM to full scale deflection.
z Terminal FM provides the pulse output. By setting Pr. 900, you can calibrate the
meter connected to the inverter from the parameter unit without providing a
calibration resistor.
z You can display a digital value on a digital counter using the pulse train signal from
terminal FM. A 1440 pulses/sec. output is provided at the full scale value as
explained in the section of Pr. 54. When the running frequency has been selected
for monitoring, the ratio of this FM terminal output frequency can be set in Pr. 55.
T1
DC8V
T2
Pulse width T1
Pulse period T2
(1)Calibration of terminal FM
1) Connect a meter (frequency meter) across inverter terminals FM-SD.
(Note the polarity. FM is the positive terminal.)
2) When a calibration resistor has already been connected, adjust the resistance to
"0" or remove the resistor.
3) Set any of "0 to 2" in Pr. 54.
When the running frequency or inverter output current has been selected as the
output signal, preset in Pr. 55 or Pr. 56 the running frequency or current at which
the output signal is 1440Hz.
At this 1440 pulses/sec., the meter normally deflects to full scale.
Meter
1mA full scale
Analog meter
1mA
FM
SD
: Adjusted with Pr. 900
: Set in Pr. 55 (frequency monitoring)
Set in Pr. 56 (current monitoring)
153
PARAMETERS
Related parameters
Pr. 54 "FM terminal function
selection"
Pr. 55 "frequency monitoring
reference"
Pr. 56 "current monitoring
reference"
1440 pulses/sec.
(Digital meter)
( − ) ( + )
Note : The parameter is factory-set to 1mA
full-scale or 1440 pulses/sec. FM
output frequency at 60Hz.
FM
SD
4