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APPENDIX
(3) Description of signal and function
The following table lists which operation, the forced stop deceleration or the dynamic brake, will function
for each signal input or power-off.
Input signal to
MR-J4 series
Signal logic
servo amplifier
Normally closed
EM2
contact opens
Normally closed
STO1
contact opens
Normally closed
STO2
contact opens
Normally closed
LSP
contact opens
Normally closed
LSN
contact opens
Normally open
Reset command
contact closes
Servo-on
Normally open
command
contact opens
Servo amplifier
Control circuit
power supply
shut-off
Servo amplifier
Main circuit
power supply
shut-off
(4) Basic operation example
The following shows when you use MR-J3-D05 with a MR-J4 series servo amplifier.
The switching of STOA is output to CN8A and usually is input to the MR-J4 series servo amplifier.
The switching of STOB is output to CN8B and usually is input to the MR-J4 series servo amplifier.
A-axis shutdown 1 and 2
A
1
2
B
1
2
B-axis shutdown 1 and 2
EM2 input
EM2
STO1 STO2
MR-J4
MR-J4 series
Servo motor speed
Forced stop
deceleration
Definition
Decelerating to stop
signal
STO1 shut-off signal
STO2 shut-off signal
Stroke end +
Stroke end -
Alarm reset
Servo-off
Energizing (close)
( )
Shut-off (open)
( )
Stop
Operation
( )
Energizing (close)
Shut-off (open)
( )
0 r/min
App. - 17
: operates
: does not
operate
-
-
Unlike the decelerating to stop signal, RES and SON
are prioritized.
-
-
Decelerating to stop starts with dynamic brake after
control circuit power supply shut-off is detected.
Deceleration to stop starts at the detection voltage of
[AL. 10 Undervoltage], and the dynamic brake starts at
80% of the detection voltage.
Shut off delay
Servo motor drivable
Remarks
STO shut-off
STO
STO
STO status
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