YASKAWA A1000 Series Technical Manual page 107

Sequence Circuit Configuration Example
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The braking sequence should be designed as follows:
• A normally open signal (N.O.) should be used to control the brake so that it is released when terminal M1-M2 closes.
• When a fault signal is output, the brake should close.
Figure 4.12
• The brake should release just a bit after the Run command is issued, allowing the motor to build up torque. If using the
V/f, V/f w PG or OLV control modes and the "Frequency detection 2" signal controls the brake, the motor can be given
time to build up torque by setting the brake release level in parameter L4-01. Additionally, DC Injection Braking at
start can be applied. If using CLV or CLV/PM and the "During frequency output" signal controls the brake, initial
excitation should be enabled. Set the initial excitation time to parameter b2-03.
• The time chart below gives a an example sequence.
Figure 4.13
S1-SC
Input
S6-SC
Output
M1-M2
Figure 4.14
S1-SC UP
Input
S6-SC Fast/slow
Output frequency
Output
During Run 2
M1-M2
(H2-01 = 37)
Holding brake
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Drive
UP
S1 Forward Run
DOWN
S2 Reverse
Fault Contact
Run
Fast/Slow
S6 Multi-speed
step 2
SC
"Frequency Detect 2"
or "During Frequency
Output"
Figure 4.13 Sequence Circuit Configuration
OFF
ON
UP
OFF ON
Fast/Slow
b6-02
d1-03
Output frequency
b6-01
0
Brake Open Frequency L4-01
Frequency Detection 2
ON
(H2-01 = 05)
Holding brake
Open
Closed
Figure 4.14 Holding Brake Time Chart (V/f, V/f w/PG, OLV)
OFF
ON
OFF
ON
d1-03
L4-01
0
ON
Open
Closed
Figure 4.15 Holding Brake Time Chart (CLV, CLV/PM)
Holding brake
MA
auxilary relay coil
Safety
MB
BR
Circuit
MC
M1
(250 Vac 1 A or less)
(30 Vdc 1 A or less)
M2
d1-01
b2-04
DC Injection braking
b2-01 (Zero speed level) or E1-09 (Min. output frequency)
OFF
Closed
d1-01
b2-04
Time
Zero speed control
b2-01 (Zero speed level) or E1-09 (Min. output frequency)
OFF
Closed
4.6 Application Selection
YEG
YEG
Time
<1>
YEG
<1>
4
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