Mitsubishi Electric MELSERVO-J3 Series Manual page 52

Part 2: Review on Replacement of MR-J3-_A_ with MR-J4-_A_
MR-J3-_A_
No. Name and function
PA05 Number of command input pulses per revolution
Turn off the power and then on again after setting
the parameter to validate the parameter value.
When "0" (initial value) is set in [Pr. PA05], the
electronic gear ([Pr. PA06, PA07]) is made valid.
When the setting is other than "0", that value is
used as the command input pulses necessary to
rotate the servo motor one turn. At this time, the
electronic gear is made invalid.
Number of command input pulses
per revolution
Parameter No.PA05
"0"(Initial value)
Command
pulse train
Pt
FBP
Other than "0"
Pt (Encoder resolution of servo motor): 262144 [pule/rev]
[Pr. PA05]
setting
Electronic gear ([Pr. PA06]/[Pr.
0
PA07]) is made valid.
Number of command input
1000 to 50000 pulses necessary to rotate the
servo motor one turn [pulse]
PA06 Electronic gear numerator
PA07 (command pulse multiplying factor numerator)
Electronic gear denominator
(command pulse multiplying factor denominator)
Incorrect setting can lead to unexpected fast
rotation, causing injury.
The electronic gear setting range is
1 CMX
2000
10 CDV
If the set value is outside this range, noise may be
generated during acceleration/ deceleration or
operation may not be performed at the preset speed
and/or acceleration/deceleration time constants.
Always set the electronic gear with servo off state to
prevent unexpected operation due to improper
setting.
Concept of electronic gear
The machine can be moved at any multiplication
factor to input pulses.
Number of command input pulses
per revolution
Parameter No.PA05
"0"(Initial value)
Command
pulse train
Pt
FBP
Other than "0"
[Pr. PA06]
CMX
=
[Pr. PA07]
CDV
Initial
value
0
Electronic gear
Parameter No.PA06, PA07
CMX
Servo motor
CDV
Deviation
M
counter
Encoder
Description
1
1
Electronic gear
Parameter No.PA06, PA07
CMX Servo motor
CDV
Deviation
M
counter
Encoder
MR-J4-_A_
No. Name and function
PA05 Number of command input pulses per revolution
The servo motor rotates based on set command
input pulses.
To enable the parameter value, set "Electronic gear
selection" to "Number of command input pulses per
revolution (1 _ _ _)" of in [Pr. PA21].
Setting range: 1000 to 1000000
PA06 Electronic gear numerator (command pulse
multiplication numerator)
Set the numerator of the electronic gear.
To enable the parameter, select "Electronic gear (0
_ _ _)" or "J3 electronic gear setting value
compatibility mode (2 _ _ _)" of "Electronic gear
selection" in [Pr. PA21].
The following shows a standard of the setting range
of the electronic gear.
1 CMX
< < 4000
10 CDV
If the set value is outside this range, noise may be
generated during acceleration/deceleration or
operation may not be performed at the preset speed
and/or acceleration/deceleration time constants.
Number of command input pulses per
revolution ([Pr. PA05] "1000" to "1000000")
Electronic gear selection
(x _ _ _) ([Pr. PA21])
"0" (initial value)
"1"
Command
pulse train
"2"
X16
"3" (Note)
X32
Pt (servo motor resolution): 4194304 pulses/rev
Note
This parameter is supported with software
version B4 or later.
Always set the electronic gear with servo-off state to
prevent unexpected operation due to improper
setting.
Setting range: 1 to 16777215
PA07 Electronic gear denominator (command pulse
multiplication denominator)
Set the denominator of the electronic gear.
To enable the parameter, select "Electronic gear (0
_ _ _)" or "J3 electronic gear setting value
compatibility mode (2 _ _ _)" of "Electronic gear
selection" in [Pr. PA21].
Setting range: 1 to 16777215
2 - 23
Initial
value
10000
Electronic gear
([Pr. PA06]/[Pr. PA07])
CMX
CDV
Pt
Servo motor
FBP
+
Deviation
M
counter
-
CMX
CDV
CMX
Encoder
CDV
Control
mode
P
1 P
1 P