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MDS-D/DH Series Specifications Manual
3-5 Sequence functions
3-5 Sequence functions
3-5-1 Contactor control function
With this function, the contactor ON/OFF command is output from the power supply unit (or servo/spindle
drive unit for integrated type) based on the judgement as to whether it is in emergency stop, emergency stop
cancel, spindle deceleration and stop or vertical axis drop prevention control, etc.
3-5-2 Motor brake control function
With this function, the brake ON/OFF command is output from the servo drive unit based on the judgement
as to whether it is in emergency stop, emergency stop cancel or vertical axis drop prevention/pull-up control,
etc.
When a multiaxis drive unit is connected, all the axes are simultaneously controlled.
3-5-3 External emergency stop function
Besides the emergency stop input from the NC, double-protection when an emergency stop occurs can be
provided by directly inputting an external emergency stop, which is a second emergency stop input, to the
power supply unit (servo/spindle drive unit for integrated type).
Even if the emergency stop is not input from NC for some reason, the contactors will be activated by the
external emergency stop input, and the power can be shut off.
3-5-4 Specified speed output
This function is to output a signal that indicates whether the machine-end speed has exceeded the speed
specified with the parameter.
With this function, the protection door, etc. can be locked to secure the machine operator when the machine-
end speed has exceeded the specified speed. This function can also be used for judging whether the current
machine-end speed is higher than the specified speed.
3-5-5 Quick READY ON sequence
With this function, the charging time during READY ON is shortened according to the remaining charge
capacity of the power supply unit. When returning to READY ON status immediately after the emergency
stop input, the charging time can be shortened according to the remaining charge capacity and the time to
READY ON is shortened.
CN1A
CN4
MDS-D/DH-CV
CN4
3 EMG2
2
(
NC
)
1 EMG1
CN23B
CN23A
OPT1
3 MC2
2
(
NC
)
1 MC1
EMG
MDS-D/DH-V1/V2/SP/SP2
SH21 cable
(24VDC)
External emergency
stop switch
External emergency stop input
Mitsubishi NC
G391 cable
Alarm
Emergency
stop
Optical
communication
Emergency
stop
Alarm
Contactor shutoff
command