5.7 H: Terminal Functions
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual 183
Parameter Details
5
Setting 2: External reference 1/2 selection
This function can be used to switch the Run command and frequency reference source between External reference 1 and
2 if the drive is in the REMOTE mode.
Note: With default settings 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 117 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 155 for details.
Setting 6: Jog reference selection
The Jog frequency set in parameter d1-17 becomes the frequency reference when the input terminal closes. Refer to d1:
Frequency Reference on page 155 for details.
Setting 7: Accel/decel time selection 1
Used to switch between accel/decel times 1 (C1-01 and C1-02) and 2 (C1-03 and C1-04). Refer to C1-01 to C1-08:
Accel, Decel Times 1 to 4 on page 140 for details.
Setting 8, 9: Baseblock command (N.O., N.C.)
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 digital operator to indicate baseblock. When baseblock ends and a Run
command is active, the drive performs Speed Search to get the motor running again.
NOTICE: If using baseblock in hoist applications, make sure the brake closes when the drive output is cut off by a Baseblock
command triggered via one of the input terminals. Failure to do so will result in the motor suddenly coasting when the Baseblock
command is entered, causing the load to slip.
Figure 5.48
Figure 5.48 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. 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)
DIgital Input Function
Drive Operation
Input Open Input Closed
Setting 8 (N.C.) Baseblock (Interrupt output) Normal operation
Setting 9 (N.O.) Normal operation Baseblock (Interrupt output)
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
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