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MELSEC-
A
5 DATA USED FOR POSITIONING CONTROL
Pr.2
to
Pr.4
Movement amount per pulse
Set the movement amount per pulse count when outputting a pulse train from the
D75P2. The setting is made with
Pr.2 to Pr.4 . (The case for the " Pr.1 Unit
setting" is "mm" is explained below.)
The movement amount per pulse is expressed with the following expression.
Movement amount per pulse =
Movement amount per rotation (Al)
No. of pulses per rotation (Ap)
* When carrying out positioning, an error (mechanical error) could occur between
the designated movement amount and actual movement amount. In that case,
the error can be compensated with the "movement amount per pulse". (Refer to
section "12.3.2 Electronic gear function".)
POINT
If the movement amount per pulse is less than 1, command frequency variations
will occur.
Smaller setting will increase variations and may cause machine vibration.
If the movement amount per pulse becomes less than 1, also use the electronic
gear function of the drive unit and make setting so that the movement amount per
pulse is 1 or greater.
Pr.2
No. of pulses per rotation (Ap)
Set the No. of pulses required for the motor shaft to rotate once. When using the
Mitsubishi servo amplifier MR-H, MR-J2/J2S* or MR-C, set the "resolution per
servomotor rotation" given in the speed/position detector specifications.
No. of pulses per rotation (Ap) = Resolution per servomotor rotation
*: Since the "resolution per servomotor revolution" of our servo amplifier MR-J2S
exceeds 65535 pulses, make setting after referring to the Servo Amplifier
Instruction Manual.
[Table 1]
Pr.1
setting value
Value set with peripheral device
(unit)
Value set with sequence program
(unit) *
0 : mm
0.1 to 6553.5 (
m)
1 to 65535 (
10
-1
m)
1 : inch 0.0001 to 0.65535 (inch)
1 to 65535 (
10
-5
inch)
2 : degree 0.00001 to 0.65535 (degree)
1 to 65535 (
10
-5
degree)
3 : pulse 1 to 65535 (pulse) 1 to 65535 (pulse)
* 1 to 32767 : Set as a decimal
32768 to 65535 : Convert into hexadecimal and set
1
2
3
4
Pr.
6
7
8
9
10
11
12
13
14
APPEN-
DICES