YASKAWA T1000V, Technical Manual

Page: 161 / 444

5.7 H: Terminal Functions
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual 161
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Setting 2: External Reference 1/2 Selection
The external reference 1/external reference 2 selection function allows the user to switch between the frequency
reference and Run command source between external reference 1 and 2.
Note: The default setting of the drive is not to allow switching between external reference 1 and 2 during run. Refer to b1-07: LOCAL/
REMOTE Run Selection on page 111 if this feature is required by the application.
Setting 3 to 5: Multi-Step Speed Reference 1 to 3
Used to switch Multi-Step Speed frequency references d1-01 to d1-08 by digital inputs. Refer to d1-01 to d1-08, d1-17:
Frequency Reference 1 to 8 and Jog Frequency Reference on page 143 for details.
Setting 6: Jog Frequency Reference Selection
Used to select the Jog frequency set in parameter d1-17 as active frequency reference. Refer to d1-01 to d1-08, d1-17:
Frequency Reference 1 to 8 and Jog Frequency Reference on page 143 for details.
Setting 7: Accel/Decel Time Selection 1
Used to switch between accel/decel times 1 and 2. Refer to C1-01 to C1-08: Accel, Decel Times 1 to 4 on page 133 for
details.
Setting 8/9: External Baseblock (N.O.) and External Baseblock (N.C.)
Setting 8 or 9 assign the Baseblock command to digital input terminals. When the drive receives a Baseblock command,
the output transistor stop switching and the motor coasts to stop. During this time, the alarm “bb” will flash on the LED
operator to indicate baseblock. For more information on alarms,
Refer to Alarm Detection on page 256 . When baseblock
ends and a Run command is active, the drive performs Speed Search to get the motor running again ( Refer to b3: Speed
Search on page 115 for details).
Figure 5.38
Figure 5.38 Baseblock Operation During Run
Setting A: Accel/Decel Ramp Hold
When the digital input programmed for the Accel/Decel Ramp Hold function closes, the drive will lock ("hold") the
output frequency. All acceleration or deceleration will cease, and the drive will hold the current speed. Acceleration or
deceleration will resume once the input is opened again.
Setting B: Drive Overheat Alarm (oH2)
Triggers an oH2 alarm when the contact closes. Because this is an alarm, drive operation is not affected.
Status Description
Open External reference 1 is used (defined by parameters b1-01 and b1-02)
Closed External reference 2 is used (defined by parameters b1-15 and b1-16)
Operation
Inputs
Setting 8 (N.O.) Setting 9 (N.C.)
Normal operation Open Closed
Baseblock (Interrupt output) Closed Open
Begin Speed Search from the
previous frequency reference
Run command
Baseblock input
Frequency
reference
Output frequency
OFF ON
Output off, motor coasts
ON
Baseblock
release