Yaskawa AC Drive Z1000 AC Drive HVAC Fan User Manual
Page 26
Three inputs (Start-Stop-FWD/REV). Set A1-03 to 3330 to initialize the drive and preset terminals S1, S2, and S5 to these
functions.
Refer to Setting 0: 3-Wire Sequence on page 73
Setting 2: Serial Communication (APOGEE FLN, BACnet, MEMOBUS/Modbus, Metasys N2)
This setting requires entering the Run command via serial communications by connecting the RS-422/RS-485 serial
communication cable to control terminals R+, R-, S+, and S- on the terminal block.
for instructions.
Setting 3: Option Card
This setting requires entering the Run command via the communication option board by plugging a communication option
board into the CN5 port on the control PCB. Refer to the option card manual for instructions on integrating the drive into the
communication system.
Note:
If b1-02 is set to 3, but an option card is not installed in CN5, an oPE05 Programming Error will be displayed on the HOA keypad and the
drive will not run.
n
b1-03: Stopping Method Selection
Selects how the drive stops the motor when the Run command is removed or when a Stop command is entered.
No.
Parameter Name
Setting Range
Default
b1-03
Stopping Method Selection
0 to 3
1
Setting 0: Ramp to Stop
When the Run command is removed, the drive will decelerate the motor to stop. The deceleration rate is determined by the
active deceleration time. The default deceleration time is set to parameter C1-02.
When the output frequency falls below the level set in parameter b2-01, the drive will start DC injection or Short Circuit
Braking depending on the selected control mode.
Refer to b2-01: DC Injection Braking Start Frequency on page 29
details.
Setting 1: Coast to Stop
When the Run command is removed, the drive will shut off its output and the motor will coast (uncontrolled deceleration) to
stop. The stopping time is determined by the inertia and the friction in the driven system.
Drive output is shut off
Run
command
Output
frequency
Motor speed
ON
OFF
Figure 1.3 Coast to Stop
Note:
After a stop is initiated, any subsequent Run command entered will be ignored until the minimum baseblock time (L2-03) has expired. Do
not enter Run command until it has come to a complete stop. Use DC Injection at Start (
Refer to b2-03: DC Injection Braking Time at
) or Speed Search (
Refer to b3: Speed Search on page 31
) to restart the motor before it has completely stopped.
Setting 2: DC Injection Braking to Stop
When the Run command is removed, the drive will enter baseblock (turn off its output) for the minimum baseblock time
(L2-03). When the minimum baseblock time has expired, the drive will inject the amount DC current set in parameter b2-02
into the motor windings to brake the motor. The stopping time in DC Injection Braking to Stop is significantly faster compared
to Coast to Stop.
Note:
This function is not available in OLV/PM control mode (A1-02 = 5).
1.2 b: Application
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YASKAWA ELECTRIC SIEP YAIZ1U 03A YASKAWA AC Drive – Z1000 Programming Manual