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 140. When baseblock ends and a
Run command is active, the drive performs Speed Search to get the motor running again.
Operation
Inputs
Setting 8 (N.O.) Setting 9 (N.C.)
Normal operation Open Closed
Baseblock (Interrupt output) Closed Open
NOTICE: If using baseblock in elevator applications, make sure the brake closes when the drive output is cut off by a Baseblock input.
Failure to do so will result in the motor suddenly coasting when the Baseblock command is entered, causing the load to slip.
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
Figure 5.16 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.
If the Accel/Decel Ramp Hold function is enabled (d4-01 = 1), the drive will save the output frequency to memory whenever
the Ramp Hold input is closed. When the drive is restarted after stop or after power supply interruption, the output frequency
that was saved will become the frequency reference (provided that the Accel/Decel Ramp Hold input is still closed). Refer
to d4-01: Frequency Reference Hold Function Selection on page 93 for details.
Setting F: Not Used/Through Mode
Any digital input that is not used should be set to F. When set to “F”, an input does not trigger any function in the drive. Setting
F, however, still allows the input status to be read out by a PLC via an optional MEMOBUS/Modbus communications interface.
This way external sensors can be connected to unused drive digital inputs, thus reducing the need for separate PLC I/O units.
Setting 10/11: Up/Down Command
Using the Up/Down function allows the frequency reference to be set by two push buttons. One digital input must be
programmed as the Up input (H1-oo= 10) to increase the frequency reference, the other one must be programmed as the
Down input (H1-oo= 11) to decrease the frequency reference.
The Up/Down function has priority over the frequency references digital operator and analog inputs (b1-01 = 0, 1). If the Up/
Down function is used, then references provided by these sources will be disregarded.
The inputs operate as shown in the table below.
Status
Description
Up (10) Down (11)
Open Open Hold current frequency reference
Closed Open Increase frequency reference
Open Closed Decrease frequency reference
5.6 H: Terminal Functions
100
YASKAWA ELECTRIC SIEP C710606 31B YASKAWA AC Drive – J1000 Technical Manual
http://nicontrols.com
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