YASKAWA AC Drive-A1000 Technical Manual page 210

5.7 H: Terminal Functions
If the Accel/decel ramp hold function is enabled (d4-01 = 1), the drive saves the output frequency to memory when the Ramp
Hold input is closed. When the drive is restarted after stop or after power supply interruption, the saved output frequency
becomes the frequency reference (provided that the Accel/decel ramp hold input is still closed).
Reference Hold Function Selection on page 173
Setting B: Drive Overheat Alarm (oH2)
Triggers an oH2 alarm when the contact closes. Drive operation is not affected because this is an alarm.
Setting C: Analog Terminal Input Selection (Terminal A1, A2, A3)
When closed, the terminals specified in H3-14 are enabled. When open, the drive disregards the input signal to the analog
terminals.
Setting D: PG Encoder Disable
When closed, the drive disregards PG feedback from the motor when using V/f Control with PG. When the terminal is reopened,
the drive resumes using PG feedback to control motor speed.
Setting E: ASR Integral Reset
Switches between PI control and P control by resetting the integral value. Integral operation is disabled when the terminal is
closed and the drive uses P control. PI control resumes when the terminal opens.
Setting F: Through Mode
Select this setting when using the terminal in a pass-through mode. 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.
Setting 10, 11: Up/Down Function
The Up/Down function allows the frequency reference to be set by two push buttons when one digital input is programmed
as the Up input (H1-oo= 10) to increase the frequency reference and the other digital input is programmed as the Down input
(H1-oo= 11) to decrease the frequency reference.
The Up/Down function takes priority over the frequency references from the digital operator, the analog inputs, and the pulse
input (b1-01 = 0, 1, 4). When using the Up/Down function, 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 occurs when only one of the Up/Down functions is programmed to a digital input.
2. An oPE03 alarm occurs when the Up/Down function is assigned to the terminals and a different digital 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
command (H1-oo = 2).
Using the Up/Down Function with Frequency Reference Hold (d4-01)
• If 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 saved reference value. Close the Up or Down input without an active Run
command to reset the saved value.
Using the Up/Down Function with Frequency Reference Limits
Parameter d2-01 determines the upper frequency reference limit.
The value for the lower frequency reference limit depends on the parameter d4-10 setting. This value can be set by an analog
input or parameter d2-02.
Run command is applied, the lower limits function as follows:
• If the lower limit is set by d2-02 only, the drive accelerates to this limit as soon as a Run command is entered.
• If the lower limit is determined by an analog input only, the drive accelerates to the limit when both the Run command and
an Up or Down command are active. The drive will not start running if only the Run command is active.
210
for details.
Open
Open
Closed
Closed
Refer to d4-01: Frequency Reference Hold Function Selection on page
Refer to d4-10: Up/Down Frequency Reference Limit Selection on page 177
Drive Operation
Hold current frequency reference
Increase frequency reference
Decrease frequency reference
Hold current frequency reference
Refer to Drive Alarms, Faults, and Errors on page
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Refer to d4-01: Frequency
295.
173.
for details. When a