Mitsubishi Electric MELSERVO-JN Series Instruction Manual page 67

3. SIGNALS AND WIRING
Device Symbol
Speed selection 1 SP1
Speed selection 2 SP2
Speed selection 3 SP3
Proportion control PC
Forced stop EM1
Clear CR
Connec-
tor pin
No.
<Internal speed control mode>
Used to select the command speed for operation. (Max. 8 speeds)
(Note) Input device
SP3 SP2
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
Note. 0: off
1: on
<Internal torque control mode>
Used to select the limit speed for operation. (Max. 8 speeds)
(Note) Input device
SP3 SP2
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
Note. 0: off
1: on
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. When the
servo motor shaft is to be locked mechanically after positioning
completion (stop), switching on the proportion control (PC) upon
positioning completion will suppress the unnecessary torque generated to
compensate for a 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.
When EM1 is turned off (contact between commons is opened), the
CN1-8
servo amplifier falls in a forced stop state in which the base circuit is shut
off, and the dynamic brake activates.
When EM1 is turned on (contact between commons is shorted) in the
forced stop state, the state can be reset.
When CR is turned on, the droop pulses of the position control counter
CN1-5
are cleared on its leading edge. The pulse width should be 10ms or
more.
The delay amount set in parameter No. PB03 (position command
acceleration/deceleration time constant) is also cleared. When parameter
No. PD22 is set to "
on.
Functions/Applications
Speed command
SP1
Internal speed command 0 (parameter No. PC05)
0
Internal speed command 1 (parameter No. PC06)
1
Internal speed command 2 (parameter No. PC07)
0
Internal speed command 3 (parameter No. PC08)
1
Internal speed command 4 (parameter No. PC31)
0
Internal speed command 5 (parameter No. PC32)
1
Internal speed command 6 (parameter No. PC33)
0
Internal speed command 7 (parameter No. PC34)
1
Speed limit
SP1
Internal speed limit 0 (parameter No. PC05)
0
Internal speed limit 1 (parameter No. PC06)
1
Internal speed limit 2 (parameter No. PC07)
0
Internal speed limit 3 (parameter No. PC08)
1
Internal speed limit 4 (parameter No. PC31)
0
Internal speed limit 5 (parameter No. PC32)
1
Internal speed limit 6 (parameter No. PC33)
0
Internal speed limit 7 (parameter No. PC34)
1
1 ", the pulses are always cleared while CR is
3 - 18
Control
I/O
mode
division
P S T
DI-1
DI-1
DI-1
DI-1
DI-1
DI-1