5.2 b: Application
138 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Setting 1: Control Circuit Terminal
This setting requires that the Run and Stop commands are entered from the digital input terminals. The following
sequences can be used:
• 2-wire sequence 1:
Two inputs (FWD/Stop-REV/Stop). Initializing the drive by setting A1-03 = 2220, presets the terminals S1 and S2 to
these functions. This is the default setting of the drive. Also refer to Setting 40, 41: Forward run, Reverse run
command for 2-wire sequence on page 221.
• 2-wire sequence 2:
Two inputs (Start/Stop-FWD/REV). Also refer to Setting 42, 43: Run and direction command for 2-wire sequence 2
on page 221.
• 3-wire sequence:
Three inputs (Start-Stop-FWD/REV). Initialize the drive by setting A1-03 = 3330 presets the terminals S1, S2, and S5
to these functions. Also refer to Setting 0: 3-Wire Sequence on page 215.
Setting 2: MEMOBUS/Modbus Communications
To issue a Run command via serial communications, set b1-02 to 2 and connect the RS-485/422 serial communication
cable to control terminals R+, R-, S+, and S- on the removable terminal block. For instructions, Refer to MEMOBUS/
Modbus Communications on page 477.
Setting 3: Option Card
To issue the Run command via the communication option board, set b1-02 to 3 and plug a communication option board
into the CN5-A port on the control PCB. Refer to the manual supplied with the option board for instructions on
integrating the drive into the communication system.
Note: If b1-02 is set to 3, but an option board is not installed in CN5-A, an oPE05 operator programming error will be displayed on the
digital operator and the drive will not run.
■ b1-03: Stopping Method Selection
Select how the drive stops the motor when the Run command is removed or when a Stop command is entered.
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, Zero Speed
Control or Short Circuit Braking, depending on the selected control mode. Refer to b2-01: DC Injection Braking Start
Frequency on page 144 for 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.
Figure 5. 3
Figure 5.3 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. To start the motor back up before it has stopped
completely, use DC Injection at start (refer to b2-03: DC Injection Braking Time at Start on page 145) or Speed Search (refer to
b3: Speed Search on page 146).
No. Parameter Name Setting Range Default
b1-03 Stopping Method Selection 0 to 3, 9 0
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