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3.7
APPLICATION
3.7.2
Emergency
Stop Dynamic
Braking
(DB) Circuit
3.7.1
Switching
Operation
of Multiple
Servomotors
When
an external
DB
circuit
for
emergency
stop
is used,
make
and
break
the DB
circuit in the
When one Servopack
is used for switching operation
sequence
shown
in Fig. 3.26 (a) and
(b) . The
of multiple servomotors (the same type and capacity) , DB resistance value differs depending on the appli-
follow the procedure below [Fig. 3.25 (a) and (b). ]
cable motors and conditions• Examples
are shown
• Input
stop reference
(speed
reference
voltage:
in Table
3.7 as reference.
When
making
a DB
circuit with
the overtravel
0 V) [DCMI
stop].
I
preventive circuit, contact your Yaskawa
repre-
• Input external base off (terminals
(_ and
(_):
sentative.
ON).
i
• Input the externalbase offwith an emergency
• Release DC
output fo_ DCMI
(MCI:
OFF).
stop signal (terminals (_ and
O:
ON).
• Break
TG
circuit for DCMI
(CXI:
OFF).
• Input DB circuit (MC2:
ON)
I
. (Motor
stop)
• Input DC
output
for DCM2
(MC2:
ON).
1
(Speed reference voltage: 0 V)
• Make
TG
circuit for DCM2
(CX2:
ON).
• Break DB circuit ( MC2: OFF)
• Release external base off (terminals (_
and
• Release
the external
base
off (terminals
(_
and
(_): OFF).
i
(_): OFF).
• Input
speed
reference
[DCM2
run].
NOTES
NOTES
1. Arrow 1 shows a delay time greater than the
1. Arrow I shows a delay time greater than the
operating time of one relay.
operating time (10 ms) of one relay.
2. Release the DB circuit after setting the speed
2. Input the external base off after a delay of one
reference to 0 V.
relay
from
the time
the motor
has stopped.
POWER
SUPPLY
I
_1
THREEPHASE
(_
rl_t-°
°_ _lr'l
_ _
,?,
:_
_1 /
DCM
,._,
-_--
I
SERVOPACK
DCM
1
200/220
VAC
i
1 I
/
Y {C ; i
'
! i I
I I
(_ TG
SPEED
-
-
_'-__---'J
I
l
_ :_2 ..... -19----1t
.........
"]
'
CIRCuITREFERENCE
EXTERNAL
"lJ"
II
SPEEDREFERENCE
----<1_'_---
BASE
OFF
_1
]
CIRCUIT
T' I
(a)
DB Circuit
for Emergency
Stop
EXTERNAL
eASE
OFF
(a)
Switching
Operation
Circuit for
INPUTOF EMERGENCY
Multiple (Two) DC Servomotors
STOP SIGNAL
ON
REFERENCE
REFERENCE
EXTERNAL
I
INPUT
INPUT
BASEOFF
OFF
OFF
SPEED REFERENCE
I
_
]
I
OV
I
'
I
I
,
,,
EXTERNAL
eASEOEE OEE ',
!
MC2 OFF ',d S°EED ON
I OFF
i
,
,
REFERENCE
INPUT
i
"
"
SPEED ,
I
MC 1, CX 1
ON
_
I
OFF
REFERENCE
I
0V
SPEED
REFERENCE
---
I
,
....
NPUT
II
' f
;
i
RUNNINGI
I
MC 2, CX2
OFF
i....
.._
"_1
--IlI_,_
i/
I
ON
MOTOR
I
JI J
MOTOR
(DCM 1 )
r- to
I
II
I
__
_
;
---_
STOP
'
!
R_',
,
STOP
,
I
,
_,
DB STOP
RESTART
(DECELERATION)
_
RUNNING
MOTOR
(DCM 2)
STOP
_-_
Note:
Arrow
_ shows
a delay
time
greater
than
the operating
(ACCELERATION)
time
of one
relay.
Notes:
1. Arrow_shows
a delay
time
greater
than
the
operating
time
(b)
Timing Chart when Making and Breaking
(10ms) o f onerelay.
DB Circuit for Emergency
Stop
2. Turn
on
the
external
base
off
after
the
motor
has stopped
completely.
This
can
be done
normally
by
setting
timer
to
from
the speed
reference
OFF (set to greater
than
the
motor
Fig. 3.26
Use of DB Circuit for Emergency
Stop
stopping
time).
3. For
MC1
and
MC2,
use magnetic
contactor
with
high
contact
reliability.
(b)
Switching-operation Timing-chart for
Multiple (Two) DC Servomotors
38
Fig. 3.25
Switching Operation for
Multiple DC Servomotors
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