Basic Parameters 2 - Mitsubishi Electric MELSEC-L LD75P User Manual

5.2.2

Basic parameters 2

Item
Value set with GX Works2
The setting range differs depending on the "[Pr.1] Unit setting".
[Pr.8] Speed limit value
( Page 125, Section 5.2.2 (1) (a))
[Pr.9] Acceleration time 0 1 to 8388608 (ms)
[Pr.10] Deceleration time 0 1 to 8388608 (ms)
(1) [Pr.8] Speed limit value
Set the maximum speed during positioning and OPR operations. If the specified speed exceeds speed limit
value, positioning will be limited at the speed limit value.
Set the speed limit value within the range of the following formula. If the speed limit value exceeds the range, the
error "Outside speed limit value range" (error code: 910) will occur.
• The command pulse frequency converted from the speed limit value  Max. output pulse
*1 LD75P: 200kpulse/s
LD75D: 4Mpulse/s
(a) Setting range
[Pr.1] setting value
0: mm
1: inch
2: degree
3: pulse
(2) [Pr.9] Acceleration time 0, [Pr.10] Deceleration time 0
"[Pr.9] Acceleration time 0" specifies the time for the speed to increase from zero to the "[Pr.8] Speed limit value"
(When in the JOG operation control, to the "[Pr.31] JOG speed limit value".)
"[Pr.10] Deceleration time 0" specifies the time for the speed to decrease from the "[Pr.8] Speed limit value"
(When in the JOG operation control, from the "[Pr.31] JOG speed limit value".)
Speed
• If the positioning speed is set lower than the parameter-defined speed limit value, the actual
acceleration/deceleration time will be relatively short. Thus, set the maximum positioning speed equal to or
only a little lower than the parameter-defined speed limit value.
• These settings are valid for OPR, positioning and JOG operations.
• When the positioning involves interpolation, the acceleration/deceleration time defined for the reference axis
is valid.
Setting value, setting range
Value set with program
1 to 8388608 (ms)
1 to 8388608 (ms)
Value set with GX Works2 (unit)
0.01 to 20000000.00 (mm/min)
0.001 to 2000000.000 (inch/min)
0.001 to 2000000.000 (degree/min)
1 to 4000000 (pulse/s)
Pr.8
Actual
acceleration
time
Pr.9 Pr.10
Acceleration time 0
CHAPTER 5 DATA USED FOR POSITIONING CONTROL
Default value
200000
1000
1000
Value set with program (unit)
1 to 2000000000 (10
1 to 2000000000 (10
1 to 2000000000 (10
1 to 4000000 (pulse/s)
Speed limit value
Positioning speed
Time
Actual deceleration time
Deceleration time 0
Setting value buffer memory
address
Axis 1 Axis 2 Axis 3 Axis 4
10 160 310 460
11 161 311 461
12 162 312 462
13 163 313 463
14 164 314 464
15 165 315 465
*1
-2
mm/min)
-3
inch/min)
-3
degree/min)
125
5