Mitsubishi Electric MR-E A Series Instruction Manual page 279

15. MR-E-
Class No. Symbol
8
9
10
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11
12
13
AG SERVO AMPLIFIER COMPATIBLE WITH ANALOG INPUT
SC1 Internal speed command 1
Used to set speed 1 of internal speed commands.
Internal speed limit 1
Used to set speed 1 of internal speed limits.
SC2 Internal speed command 2
Used to set speed 2 of internal speed commands.
Internal speed limit 2
Used to set speed 2 of internal speed limits.
SC3 Internal speed command 3
Used to set speed 3 of internal speed commands.
Internal speed limit 3
Used to set speed 3 of internal speed limits.
Acceleration time constant
STA
Used to set the acceleration time required to reach the rated speed
from 0r/min in response to the analog speed command and internal
speed commands 1 to 7.
Speed
Rated
speed
Zero
speed
Parameter
No.11 setting
For example for the servo motor of 3000r/min rated speed, set 3000
(3s) to increase speed from 0r/min to 1000r/min in 1 second.
Deceleration time constant
STB
Used to set the deceleration time required to reach 0r/min from the
rated speed in response to the analog speed command and internal
speed commands 1 to 7.
S-pattern acceleration/deceleration time constant
STC
Used to smooth start/stop of the servo motor.
Set the time of the arc part for S-pattern acceleration/deceleration.
Speed command
0r/min
STA: Acceleration time constant (parameter No.11)
STB: Deceleration time constant (parameter No.12)
STC: S-pattern acceleration/deceleration time con-
stant (parameter No.13)
Long setting of STA (acceleration time constant) or STB (deceleration time
constant) may produce an error in the time of the arc part for the setting of the
S-pattern acceleration/deceleration time constant.
The upper limit value of the actual arc part time is limited by
2000000
for acceleration or by
STA
(Example)
At the setting of STA 20000, STB 5000 and STC 200,
the actual arc part times are as follows:
During acceleration: 100[ms]
During deceleration: 200[ms]
Name and function
If the preset speed command is
lower than the rated speed,
acceleration/deceleration time
will be shorter.
Parameter
No.12 setting
STC STB STC
STA STC
STC
2000000
for deceleration.
STB
Limited to 100[ms] since
2000000
100[ms] 200[ms].
20000
200[ms] as set since
2000000
400[ms] 200[ms].
5000
15 - 34
Initial
Unit
value
100 r/min
500 r/min
1000 r/min
0 ms
Time
0
0 ms
Time
Setting Control
range mode
0 to S
instan-
taneous
permi- T
ssible
speed
S
0 to
instan-
taneous
permi- T
ssible
speed
S
0 to
instan-
taneous
permi- T
ssible
speed
0 S T
to
20000
0 S T
to
1000