Mitsubishi Electric MELSERVO MR-J4-03A6-RJ, Instruction Manual

Page: 348 / 610

7. PARAMETERS
7 - 43
No./
symbol/name
Setting
digit
Function
Initial
value
[unit]
Control mode
CP/BCD
CL
PS
PC02
STB
Deceleration
time constant
1 Set a deceleration time constant for the automatic operation of the indexer method.
Set a deceleration time from the rated speed to 0 r/min.
Additionally, when 20000 ms or more value is set, it will be clamped to 20000 ms.
Setting range: 0 to 50000 0
[ms]
PC03
*STC
S-pattern
acceleration/
deceleration
time constant This enables to start/stop the servo motor or linear servo motor smoothly.
Set the time of the arc part for S-pattern acceleration/deceleration.
Setting "0" will make it linear acceleration/deceleration.
Servo is usually operated with linear acceleration and deceleration; however, smooth
start and stop are enabled by setting [Pr. PC03 S-pattern acceleration/deceleration
time constants]. When the S-pattern acceleration/deceleration time constants are set,
smooth positioning is enabled as shown in the following figure. Note that when it is set,
a time period from the start to output of MEND (Travel completion) is longer by the
S-pattern acceleration/deceleration time constants.
Acceleration
time constant
Servo motor
speed
0 [r/min]
Deceleration
time constant
Ta
Ta + STC Tb
Tb + STC
Rated speed
Preset speed
Ta: Time until preset
speed is reached
Tb: Time until stop
When the STC value is set longer than the constant speed time, the speed may not
reach to the command speed.
Additionally, when a value of 1000 ms or more is set, it will be clamped to 1000 ms.
Setting range: 0 to 5000
0
[ms]
PC05
SC1
Automatic
operation
speed 1 Set a positioning speed for the automatic operation speed 1, 2 of the indexer method.
Setting range: 0 to permissible instantaneous speed 100
[r/min]
PC06
SC2
Automatic
operation
speed 2 Set a positioning speed for the automatic operation speed 1, 2 of the indexer method.
Setting range: 0 to permissible instantaneous speed 500
[r/min]
PC07
SC3
Manual
operation
speed 1 Set a JOG speed of the manual operation mode, JOG operation, and home position
return mode of the indexer method.
Setting range: 0 to permissible instantaneous speed 1000
[r/min]
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