Omron J1000 User Manual page 94

5.6 H: Terminal Functions
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 84
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-= 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 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
Up (10) Down (11)
Open
Closed
Open
Closed
Note: 1. An oPE03 alarm will occur when only one of the functions Up/Down is programmed for a digital input.
2. An oPE03 alarm will occur if the Up/Down function is assigned to the terminals while another input is programmed for the Accel/
Decel Ramp Hold function. For more information on alarms,
3. The Up/Down function can only be used for external reference 1. Consider this when using Up/Down and the external reference
switching function (H1- = 2).
Using the Up/Down Function with Frequency Reference Hold (d4-01)
• When the frequency reference hold function is disabled (d4-01 = 0), the Up/Down frequency reference will be reset to
0 when the Run command is cleared or the power is cycled.
• When d4-01 = 1, the drive will save the frequency reference set by the Up/Down function. When the Run command or
the power is cycled, the drive will restart with the reference value that was saved. The value that was saved can be reset
by closing either the Up or Down input without having a Run command active.
Hold Function Selection on page
92
OFF ON
Run command
Baseblock input
Frequency
reference
Output frequency
Figure 5.16 Baseblock Operation During Run
Open
Open
Closed
Closed
84.
Setting 8 (N.O.)
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
Decrease frequency reference
Hold current frequency reference
Refer to Drive Alarms, Faults, and Errors on page
Inputs
Setting 9 (N.C.)
Open
Refer to d4-01: Frequency Reference
SIEP C710606 33A OYMC AC Drive – J1000 User Manual
Refer
121.