Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 233

5. HOW TO USE THE PROGRAM
(i) Current position latch (LPOS)
The current position at switch-on of LPS (Current position latch input) is stored. The stored position
data can be read with the communication function.
The current position latch function, which is set during the execution of the program, is reset when
the program ends. The function is also reset at an operation mode change, forced stop, alarm
occurrence, or servo-off. The function is not reset at a temporary stop only.
Command
SPN (500)
STA (200)
STB (300)
MOV (1000)
LPOS
STOP
Forward rotation
Servo motor speed 0 r/min
Reverse rotation
Current position
LPS (Latch input)
POINT
When the current position is stored using LPS (Current position latch input), the
value varies depending on the servo motor speed at switch-on of LPS.
The program does not proceeds to the next step until LPS (Current position
latch input) is switched on.
The stored data is not cleared without power-off of the servo amplifier.
After the input of LPS (Current position latch input) becomes valid by the
"LPOS" command, the input is cleared in the following conditions.
When the rising edge of LPS (Current position latch input) is detected
When the program ends
When the operation mode is changed
When the servo motor forcibly stops
When an alarm occurs
When the servo motor enters the servo-off status
Servo motor speed
Acceleration time constant
Deceleration time constant
Absolute value travel command
Set a current position latch.
Program stop
ON
OFF
5 - 26
www.kavrammuhendislik.com.tr
Description
500 [r/min]
200 [ms]
300 [ms]
STM
μm]
1000 [×10
a)
μm]
STM
Current position300 [×10
is memorized.
1000
LPS turns on at on edge
by LPOS. (a))