Mitsubishi Electric MELSERVO-JN Series Instruction Manual page 357

13. POSITIONING MODE
Connector
Device Symbol
Proportion PC
control
Forward ST1
rotation start
Reverse ST2
rotation start
Forward ST1
rotation start
Reverse ST2
rotation start
Gain changing CDP
pin No.
When PC is turned on, the type of the speed loop switches from the
proportional integral type to the proportional type.
If the servo motor at a stop is rotated even one pulse due to any
external factor, it generates torque to compensate for a position shift.
If locking the axis mechanically after the travel completion (MEND) is
turned on, turn on the proportional control (PC) simultaneously with
the travel completion (MEND). This way suppresses unnecessary
torque to be generated to compensate for the position shift.
In case of locking the servo motor shaft for a long time, turn on the
internal torque limit selection (TL1) simultaneously with the proportion
control (PC). Then, set the internal torque limit 2 (parameter No.
PC14) in order to make the torque lower than the rating.
CN1-6 1. In absolute value command system
Turning ST1 ON for automatic operation executes positioning once
on the basis of the position data set to the point table.
Turning ST1 ON for a home position return immediately starts a
home position return.
Keeping ST1 ON for JOG operation performs rotation in the
forward rotation direction.
Forward rotation indicates the address increasing direction.
2. In incremental value command system
Turning ST1 ON for automatic operation executes positioning once
in the forward rotation direction on the basis of the position data
set to the point table.
Turning ST1 ON for a home position return immediately starts a
home position return.
Keeping ST1 ON for JOG operation performs rotation in the
forward rotation direction.
Forward rotation indicates the address increasing direction.
CN1-7 Use this device in the incremental value command system.
Turning ST2 ON for automatic operation executes positioning once in
the reverse rotation direction on the basis of the position data set to
the point table.
Keeping ST2 ON for JOG operation performs rotation in the reverse
rotation direction.
Reverse rotation indicates the address decreasing direction.
CN1-6 1. For automatic operation mode
Turning ST1 ON executes the program operation selected in DI0
to DI2.
2. For JOG operation in manual operation mode
Keeping ST1 ON performs rotation in the forward rotation
direction. Forward rotation indicates the address increasing
direction.
CN1-7 Keeping ST2 ON in JOG operation in manual operation mode
performs rotation in the reverse rotation direction. Reverse rotation
indicates the address decreasing direction.
ST2 is invalid in other operation modes.
The values of the load to motor inertia moment ratio and the gains
are changed to the value set in parameter No. PB29 to PB34 by
turning CDP on.
Functions/Applications
13 - 6
Positioning
I/O
mode
division
CP CL
DI-1
DI-1
DI-1
DI-1
DI-1
DI-1