YASKAWA V1000 Series Technical Manual page 169

Setting 60: DC Injection Braking
When a DC Injection Braking command is input while the drive is stopped, DC Injection Braking operation is activated. When a Run command or a Jog
command is input, DC Injection Braking is released to start operation (Jog operation has priority).
The diagram below illustrates the DC Injection Braking function.
Setting 61: Speed Search 1
Setting 62: Speed Search 2
The speed search function detects the actual speed of a coasting motor and restarts it smoothly from that speed. It is useful for getting the application
going after momentary power loss, and finding the speed of an idling fan.
No. Parameter Name
b3-01 Speed Search Selection at Start
b3-24 Speed Search Method Selection
When the Speed Search method is set for Current Detection Speed Search (b3-24 = 0), then the input terminal set for Speed Search 1 (H1-oo = 60) will
begin looking for the motor speed from the maximum output frequency when enabled. Speed Search 2 (H1-oo = 61) instead starts looking for the motor
speed starting at the frequency reference. When an input terminal set to 60 or 61 closes, Speed Search is performed regardless of whether b3-01 is enabled
or not.
Note: Operator error oPE03 will result if both Speed Search 1 and Speed Search 2 are set to the input terminals at the same time. Only one may be selected. If baseblock occurs,
Speed Search cannot begin until the minimum baseblock time set to L2-03 passes. Speed Search 1 and Speed Search 2 will function the same when using Current Detection
Speed Search (b21-24 = 1).
Setting 65: KEB Ride-Thru 1, N.C.
Setting 66: KEB Ride-Thru 2, N.O.
The Kinetic Energy Braking (KEB) control circuit attempts to maintain the DC bus voltage at an optimum level [1.35 x ~ input voltage (E1-01)] during
momentary power loss, by using load inertia to regenerate voltage back to the DC bus. The drive decelerates at the Fast Stop rate set to C1-09 until power
is restored, or until the time runs out and an undervoltage fault (UV) occurs. The larger the inertia, the longer the deceleration rate can be extended. If the
inertia is small, then the drive must decelerate quickly to regenerate voltage back to the DC bus, and thus the ride-through time is shorter.
No.
E1-01
L2-06
L2-07 Momentary Power Loss Ride-Thru Time
*1. This value is for a 200 V class drive. Double the value when using 400 V class units.
*2. When set to 0.0, the drive accelerates up to speed at the acceleration rate set to C1-01 to 08.
Setting 67: Communication Test Mode
The drive has a built-in function for self-diagnosing the serial communications operation. The test involves wiring the send and receive terminals of the
RS-485/422 port together. The drive transmits data and then confirms the communications are received normally.
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
OFF
DC Injection Braking
Command
OFF
Fwd Run Command
DC Injection
Braking
Output Frequency
Figure 5.47 DC Injection Braking Input Timing Diagram
0: Enabled
1: Disabled
0: Current Detection Type
1: Speed Estimation
Parameter Name
Input Voltage Setting
KEB Deceleration Time
OFF
KEB Ride-Thru
(H1-0x = 65 or 66)
output
frequency
Figure 5.48 KEB Ride-Thru Timing Diagram
ON
OFF
ON
DC Injection
Braking
DC Injection Braking
Start Frequency
(B2-01)
Setting Range
Setting Range
*1
155 to 255
0.0 to 200.0
0.0 to 25.5
ON OFF
L2-06 L2-07
5.7 H: Terminal Functions
OFF
Default
Determined by A1-02
0
Default
*1
200 V
0.0 s
0.0 s *2
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