Mitsubishi Electric MR-J4 Instruction Manual page 592

APPENDIX
(7) Perform all risk assessments and safety level certification to the machine or the system as a whole.
It is recommended that a Certification Body final safety certification of the system be used.
(8) To prevent accumulation of multiple malfunctions, perform a malfunction check at regular intervals as
deemed necessary by the applicable safety standard. Regardless of the system safety level, malfunction
checks should be performed at least once per year.
(9) If the upper and lower power module in the servo amplifier are shorted and damaged simultaneously, the
servo motor may make a half revolution at a maximum. For a linear servo motor, the primary side will
move a distance of pole pitch.
App. 5.5 Block diagram and timing chart
(1) Function block diagram
+24 V
DCDC
power
0 V
SW1 SW2
(2) Operation sequence
Power supply
A-axis shutdown 1 and 2
SDI
B-axis shutdown 1 and 2
A-axis EMG start/reset
SRES
B-axis EMG start/reset
A-axis STO state 1 and 2
STO
B-axis STO state 1 and 2
Note. Refer to App. 5.10.
App. 5.6 Maintenance and disposal
MR-J3-D05 is equipped with LED displays to check errors for maintenance.
Please dispose this unit according to your local laws and regulations.
SRESA+ SRESA- TOF1A TOF2A
Safety logic
TIMER1
TIMER2
SDI1A- SDI2A- SDI1B- SDI2B-
15 ms or longer
Energizing (close)
Shut-off (open)
Release (close)
Normal (open)
Normal (close)
Shut-off (open)
STO status
TOFA STO1A+ STO2A+
STO1A- STO2A-
50 ms or longer
10 ms or shorter
Control enabled
App. - 21
A-axis circuit
SDO1A+ SDO2A+
B-axis circuit
SDO1A- SDO2A-
Shut off delay (SW1 and SW2) (Note)
STO status
Control enabled