Electronic Gear Settings - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

Cumulative pulse
Cumulative pulse
overflow times
Clear signal
(X52, X53)
 Cumulative pulse storage
• The cumulative pulse monitor value and cumulative pulse overflow times can be retained when the power is turned OFF
or the inverter is reset.
Cumulative pulse monitor/ Cumulative pulse overflow times
Pr.638
setting
At power-OFF
0 Not stored in the EEPROM
1 Stored in the EEPROM
2 Not stored in the EEPROM
3 Stored in the EEPROM
NOTE
• When the power is turned OFF during the reset process, the cumulative pulse monitor value and the cumulative pulse overflow
times are not stored in the EEPROM.
• For storing the cumulative pulse monitor value and the cumulative pulse overflow times, in the EEPROM at power OFF,
connect R1/L11 with P/+, and S1/L21 with N/- so that the control power is retained. When connecting the FR-HC2 high power
factor converter or the converter unit (FR-CC2), assign the FR-HC2/FR-CC2 instantaneous power failure detection (X11)
signal to an input terminal to input the IPF signal from the FR-HC2/FR-CC2 to the terminal for X11 signal.
Parameters referred to
Pr.52 Operation panel main monitor
5.5.9

Electronic gear settings

Vector Vector Vector PM PM PM
Set the gear ratio between the machine gear and motor gear.
Pr. Name
Command pulse scaling factor
420
numerator (electronic gear
B001
numerator)
Command pulse multiplication
421
denominator (electronic gear
B002
denominator)
424 Position command acceleration/
B005 deceleration time constant
 Gear ratio calculation (Pr.420, Pr.421)
The position resolution (travel distance per pulse ∆ [mm]) is the travel distance per motor rotation ∆s [mm] and
the feedback pulse Pf[pulse/rev] of the detector.
Δ : Travel distance per pulse [mm]
Δs
Δ Δs: Travel distance in one motor rotation [mm]
＝
Pf
pf: Number of feedback pulses [pulse/rev] (the number of pulses after the number encoder
pulses is quadruplicated)
The travel distance in 1 command pulse can be separately specified with a parameter and so an integer can be set as the travel
distance in 1 command pulse.
ON
Cleared at the ON edge
At reset
Cleared
Retained
Cleared
Retained
selectionpage 424
Initial value
1
1
0 s
Δs
＝
Δ
Pf
5.5 Position control under vector control and PM sensorless vector control
Cumulative pulse
Cumulative pulse
overflow times
Clear signal
(X52, X53)
Cumulative pulse monitor/ Cumulative pulse overflow times
(Control terminal option)
At power-OFF
Not stored in the EEPROM
Not stored in the EEPROM
Stored in the EEPROM
Stored in the EEPROM
Setting
range
1 to 32767
Set the electronic gear.
Pr.420 is the numerator and Pr.421 is the denominator.
1 to 32767
Use it when the rotation is not smooth because the
0 to 50 s electronic gear ratio is large (10 times or larger) and the
rotation speed is slow.
Pr.420
×
Pr.421
ON
Cleared while the signal is ON
At reset
Cleared
Cleared
Retained
Retained
Description
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
309