Omron V1000 User Manual page 163

5.7 H: Terminal Functions
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,
ends and a Run command is active, the drive performs Speed Search to get the motor running again
Search on page 110 for details).
Operation
Normal operation
Baseblock (Interrupt output)
NOTICE: If using baseblock in hoist 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.
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).
to d4-01: Frequency Reference Hold Function Selection on page 137
Setting B: Drive Overheat Alarm (oH2)
Triggers an oH2 alarm when the contact closes. Because this is an alarm, drive operation is not affected.
Setting C: Analog Inputs A1/A2 Enable
If a digital input programmed for this function is open, both analog inputs A1 and A2 are disabled. Close the input to
enable the inputs.
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 a communication option or MEMOBUS/
Modbus communications (through mode). 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-= 10) to increase the frequency reference, the other one must be programmed as the
Down input (H1-= 11) to decrease the frequency reference.
The Up/Down function has priority over the frequency references digital operator, analog inputs, and pulse input (b1-01
= 0, 1, 4). 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
Up (10) Down (11)
Open Open
Closed Open
162
Setting 8 (N.O.)
OFF ON
Run command
Baseblock input
Frequency
reference
Output frequency
Figure 5.45 Baseblock Operation During Run
Refer to Alarm Detection on page
Inputs
Open
Closed
Baseblock
ON
release
Begin Speed Search from the
previous frequency reference
Output off, motor coasts
for details.
Description
Hold current frequency reference
Increase frequency reference
SIEP C710606 20 OYMC AC Drive - V1000 User Manual
241. When baseblock
(Refer to b3: Speed
Setting 9 (N.C.)
Closed
Open
Refer