YASKAWA U1000 Series - Page 152

4.6 Application Selection
152 YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
■ 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
Figure 4.13 Sequence Circuit Configuration
• 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
Figure 4.14 Holding Brake Time Chart (V/f, V/f w/PG, OLV)
Figure 4. 14
Figure 4.15 Holding Brake Time Chart (CLV, CLV/PM)
<1> The drive brakes at the frequency set to b2-01 or E1-09, whichever value is higher.
<1> The drive brakes at the frequency set to b2-01 or E1-09, whichever value is higher.
U1000
(250 Vac 1 A or less)
(30 Vdc 1 A or less)
UP
DOWN
Fast/Slow
S2
MA
MB
MC
S6
M1
M2
SC
Fault Contact
Holding brake
auxilary relay coil
S1 Forward Run
Reverse
Run
Multi-step
speed reference 2
Safety
Circuit
BR
“Frequency Detect 2”
or “During Frequency
Output”
Time
UP
S1-SC
S6-SC
OFF
OFF
d1-03
d1-01
b2-04
OFF
DC Injection braking
ON
ON
ON
M1-M2
Holding brake
Fast/Slow
Output frequency
0
Frequency Detection 2
(H2-01 = 05)
Closed Closed
Open
b6-02
b6-01
Input
Output
Brake Open Frequency L4-01
b2-01 (DC injection braking start frequency)
or E1-09 (Min. output frequency)
<1>
OFF
OFF
d1-03
d1-01
L4-01
OFF
Zero speed control
ON
ON
ON
ClosedClosed
Open
Time
b2-04
UP
Fast/slow
Output frequency
During frequency output
Holding brake
S1-SC
S6-SC
M1-M2
(H2-01 = 37)
Input
Output
0
b2-01 (DC injection braking start frequency)
or E1-09 (Min. output frequency)
<1>
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