YASKAWA A1000 Technical Manual page 118

4.6 Application Selection

Sequence Circuit Configuration Example
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
<1> The drive brakes at the frequency set to b2-01 or E1-09, whichever value is higher.
Figure 4.14
S1-SC
Input
S6-SC
Output
M1-M2
<1> The drive brakes at the frequency set to b2-01 or E1-09, whichever value is higher.
118
Drive
UP
S1 Forward Run
DOWN
S2 Reverse
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
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
UP
OFF
ON
Fast/slow
d1-03
Output frequency
L4-01
0
During Run 2
ON
(H2-01 = 37)
Holding brake
Open
Closed
Figure 4.15 Holding Brake Time Chart (CLV, CLV/PM)
Holding brake
MA
auxilary relay coil
Safety
MB
Circuit
MC
Fault Contact
M1
(250 Vac 1 A or less)
(30 Vdc 1 A or less)
M2
d1-01
d1-03
b2-04
DC Injection braking
b2-01 (Zero speed level) or E1-09 (Min. output frequency)
OFF
Closed
d1-01
b2-04
Zero speed control
b2-01 (Zero speed level) or E1-09 (Min. output frequency)
OFF
Closed
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
BR
Time
Time
<1>
<1>