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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 241

. 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 110

for details).

Operation

Inputs

Setting 8 (N.O.)

Setting 9 (N.C.)

Normal operation

Open

Closed

Baseblock (Interrupt output)

Closed

Open

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.

Begin Speed Search from the
previous frequency reference

Run command

Baseblock input

Frequency
reference

Output frequency

OFF

Output off, motor coasts

Baseblock

release

Figure 5.45 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 137

for details.

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

Description

Up (10)

Down (11)

Open

Hold current frequency reference

Closed

Open

Increase frequency reference

5.7 H: Terminal Functions

162

SIEP C710606 20 OYMC AC Drive - V1000 User Manual