YASKAWA HV600 Technical Reference page 189

Ac drive bypass for hvac fan and pump applications
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The bypass uses a communications option card or input option card connected to the bypass control board to enter the
Run command.
Refer to the instruction manual included with the option card to install and set the option card.
Note:
If b1-02 = 3, but you did not connect an communications option card, oPE05 [Run Cmd/Freq Ref Source Sel Err] will flash on the keypad.
7 : AUTO Command + Term Run
The bypass uses the AUTO Command to put the bypass into AUTO Mode, and uses the terminal set for Run [Z2-xx =
21, 37] to enter the Run command.
8 : AUTO Command + Serial Run
The bypass uses the AUTO Command to put the bypass into AUTO Mode, and uses the Serial Run command
(register 0001) to enter the Run command.
9 : AUTO Command + Option Run
The bypass uses the AUTO Command to put the bypass into AUTO Mode, and uses a communications option card
connected to the bypass control board to enter the Run command.
b1-03: Stopping Method Selection
No.
Name
(Hex.)
b1-03
Stopping Method Selection
(0182)
Select the applicable stopping method for the application from these four options:
0 : Ramp to Stop
When you enter the Stop command or turn OFF the Run command, the drive ramps the motor to stop.
The drive ramps the motor to stop as specified by the deceleration time. The default setting for the deceleration time
is C1-02 [Deceleration Time 1]. The actual deceleration time changes as the load conditions change (for example,
mechanical loss and inertia).
If the output frequency is less than or equal to the value set in b2-01 [DC Injection/Zero SpeedThreshold] during
deceleration, the drive will do DC Injection Braking.
• Ramp to Stop
Parameter b2-01 sets the frequency to start DC Injection Braking at stop. If the output frequency is less than or
equal to the value set in b2-01 during deceleration, the drive will do DC Injection Braking for the time set in b2-04
[DC Inject Braking Time at Stop].
b2-01: DC Injection/Zero SpeedThreshold
b2-04: DC Inject Braking Time at Stop
Note:
When b2-01 ≤ E1-09 [Minimum Output Frequency], the drive will start DC Injection Braking from the frequency set in E1-09.
1 : Coast to Stop
When you enter the Stop command or turn OFF the Run command, the drive turns OFF the output and coasts the
motor to stop.
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Sets the method to stop the motor after removing a Run command or entering a Stop command.
Figure 5.3 Ramp to Stop
Description
E1-09: Minimum Output Frequency
5.2 b: Application
Default
(Range)
1
(0 - 3)
5
189

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