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5. PARAMETERS
Class
No.
Symbol
Name and Function
Initial
Value
Unit
Setting
Range
Control
Mode
Internal speed command 3:
Used to set speed 3 of internal speed commands.
S
10
SC3
Internal speed limit 3:
Used to set speed 3 of internal speed limits.
1000
r/min
0 to
instan-
taneous
permi-
ssible
speed
T
Acceleration time constant:
Used to set the acceleration time required to reach the rated speed
from zero speed in response to the analog speed command and
internal speed commands 1 to 3.
Time
Parameter
No.12 setting
Parameter
No.11 setting
Zero
speed
Rated
speed
Speed
If the preset command speed is
lower than the rated speed,
acceleration/deceleration time
will be shorter.
Example: Set 3000 (3s) to increase speed from 0r/min to 1000r/min in
1 second.
POINT
y
When configuring an external position loop, set 0 or minimal
values in parameters No. 11 and 12.
11
STA
0
12
STB
Deceleration time constant:
Used to set the deceleration time required to reach zero speed from
the rated speed in response to the analog speed command and
internal speed commands 1 to 3.
0
ms
0
to
20000
S
x
T
B
asi
c p
ara
meters
13
STC
S-pattern acceleration/deceleration time constant:
Used to smooth start/stop of the servo motor.
STA: Aeceleration time constant (parameter No.11)
STB: Deceleration time constant (parameter No.12)
STC: S-pattern acceleration/deceleration time con-
stant (parameter No.13)
Command speed
Servo m
ot
or
Speed
0r/min
STC
STA
STC
STC
STB STC
Time
0
ms
0
to
1000
S
x
T
