MDS-E/EH Series Instruction Manual
9 Power Backup System
446
IB-1501229-F
9.1 Deceleration and Stop Function at Power Failure
The deceleration and stop function at power failure is a function to safely decelerate the servo axes and the spindle
when a power failure occurs. This function prevents a damage on the machine due to an overrun of the servo axes, and
at the same time, realizes a protection against overvoltage for high-speed IPM spindle motors and high-speed DDMs.
9.1.1 Specifications of Stop Method for Deceleration and Stop Function at Power Failure
System
The power backup system is a system to protect the machine and drive units at a power failure. When it is used, stop
methods during some operations are different from those of when it is not used. See below for the stop methods of
<servo system> and <spindle system> when the power backup system is not used ((1) in the tables) and when it is used
((2) in the tables) depending on what is occurring.
< Servo system >
(Note 1) A deceleration and stop operation is carried out in the case of some MDS-E/EH-CV alarms. (ALM66, 68 to 6E, 70,
75)
< Spindle system >
(Note 1) A deceleration and stop operation is carried out in the case of some MDS-E/EH-CV alarms. (ALM66, 68 to 6E, 70,
75)
CAUTION
The power backup unit (MDS-D/DH-PFU) and regenerative resistor unit (R-UNIT6,7) options are required when using the
deceleration and stop function at power failure.
What is occurring
Servo power
backup setting
Power failure
NC power
down
External
emergency
stop
MDS-E/EH-
CV alarm
MDS-D/DH-
PFU
alarm
(Another
axis) Drive
unit alarm
(Its own axis)
Drive unit
deceleration
and stop
alarm
(Its own axis)
Drive unit
dynamic stop
alarm
(1) No power
backup system
Dynamic stop
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Dynamic stop
-
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Dynamic stop
(2) Deceleration
and stop function
at power failure
Deceleration
c PFU
regeneration
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Deceleration
c PFU
regeneration
Dynamic stop
in the case of
some alarms
(Note 1)
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Dynamic stop
What is occurring
Servo power
backup setting
Power failure
NC power
down
External
emergency
stop
MDS-E/EH-
CV alarm
MDS-D/DH-
PFU
alarm
(Another
axis) Drive
unit alarm
(Its own axis)
Drive unit
deceleration
and stop
alarm
(Its own axis)
Drive unit
dynamic stop
alarm
(1) No power
backup system
Coast to a
stop
Coast to a
stop
Deceleration
c
Power
regeneration
Coast to a
stop
-
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Coast to a
stop
(2)-1 Deceleration
and stop function
at power failure
*When using IM or
low-speed IPM
motor
Deceleration
c PFU
regeneration
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Deceleration
c PFU
regeneration
Coast to a
stop in the
case of some
alarms (Note
1)
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Coast to a
stop
(2)-2 Deceleration
and stop function
at power failure
*When using high-
speed IPM motor
Deceleration
c PFU
regeneration
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Deceleration
c PFU
regeneration
Coast to a
stop in the
case of some
alarms (Note
1)
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Deceleration
c
Power
regeneration
Overvoltage
protection
control
(Coast to a
stop from
deceleration
operation only
during high-
speed
rotation)
Summary of Contents for MDS-E
Page 1: ......
Page 3: ......
Page 15: ......
Page 17: ......
Page 19: ......
Page 21: ......
Page 31: ......
Page 32: ...1 IB 1501229 F 1 Installation ...
Page 76: ...45 IB 1501229 F 2 Wiring and Connection ...
Page 132: ...101 IB 1501229 F 3 Safety Function ...
Page 142: ...111 IB 1501229 F 4 Setup ...
Page 277: ...MDS E EH Series Instruction Manual 4 Setup 246 IB 1501229 F ...
Page 278: ...247 IB 1501229 F 5 Servo Adjustment ...
Page 351: ...MDS E EH Series Instruction Manual 5 Servo Adjustment 320 IB 1501229 F ...
Page 352: ...321 IB 1501229 F 6 Spindle Adjustment ...
Page 404: ...373 IB 1501229 F 7 Troubleshooting ...
Page 455: ...MDS E EH Series Instruction Manual 7 Troubleshooting 424 IB 1501229 F ...
Page 456: ...425 IB 1501229 F 8 Maintenance ...
Page 475: ...MDS E EH Series Instruction Manual 8 Maintenance 444 IB 1501229 F ...
Page 476: ...445 IB 1501229 F 9 Power Backup System ...
Page 494: ...463 IB 1501229 F 10 Appx 1 Cable and Connector Assembly ...
Page 504: ...473 IB 1501229 F 11 Appx 2 D A Output Specifications for Drive Unit ...
Page 514: ...483 IB 1501229 F 12 Appx 3 Protection Function ...
Page 523: ...MDS E EH Series Instruction Manual 12 Appx 3 Protection Function 492 IB 1501229 F ...
Page 524: ...493 IB 1501229 F 13 Appx 4 Compliance to EC Directives ...
Page 528: ...497 IB 1501229 F 14 Appx 5 EMC Installation Guidelines ...
Page 540: ...509 IB 1501229 F 15 Appx 6 Higher Harmonic Suppression Measure Guidelines ...
Page 550: ......
Page 554: ......