88 GX9 ASD Installation and Operation Manual
UP/DOWN Frequency Disposition at Power Down
Program Frequency UP/DOWN Frequency Settings
When the Frequency Mode 1 Selection (F004) setting is set to UP/DOWN
Frequency, this parameter determines the outcome of the Frequency Mode 1
(frequency) setting when the ASD is powered down, stopped, or tripped.
Settings:
0 — Erase
1 — Store
If Erase is selected, the ASD will not store the frequency setpoint and
establishes a setpoint of 0.0 Hz when restarted.
If Store is selected, the ASD will retain the ending frequency setpoint in
memory at the power down, stop, or trip. This setpoint will be used as the initial
frequency setpoint when the ASD is restarted.
An activated discrete input terminal configured as UP/DOWN Frequency
(clear) will establish a frequency setpoint of 0.0 Hz regardless of the UP/
DOWN Frequency Disposition at Power Down setting (F108) upon restart.
If running with an activated UP/DOWN Frequency (up or down) terminal,
activation of the UP/DOWN Frequency (clear) terminal forces the ASD output
to the Lower Limit Frequency (F013) setting.
UP/DOWN Frequency Function
The UP/DOWN Frequency function allows for an externally-supplied discrete
input signal to increase or decrease the output frequency of the ASD.
This method uses the discrete input terminal settings UP/DOWN Frequency
(up), UP/DOWN Frequency (down), and UP/DOWN Frequency (clear).
Activation of the Up or Down terminals increases or decreases the output
frequency for the duration of the activation at the Accel 1 or Decel 1 rates,
respectively.
To activate-and-hold either terminal will continue the up or down function until
reaching the Upper-Limit Frequency or the Lower-Limit Frequency,
respectively. At which point further activation will be ignored. The UP/DOWN
Frequency (clear) function will clear the stored frequency value if stopped or
command the ASD to output the Lower Limit Frequency if activated while
running.
Setup Requirements
F003 — Set the Command control source to Terminal Board.
F004 — Set the Frequency Mode 1 control source to
UP/DOWN
Frequency.
Set an unused discrete input terminal to UP/DOWN Frequency (up).
Set an unused discrete input terminal to UP/DOWN Frequency (down).
Set an unused discrete input terminal to UP/DOWN Frequency (clear).
F108 — Select the outcome of the Frequency Mode 1 setting when the ASD
is powered down, stopped, or tripped.
Direct Access Number — F108
Parameter Type — Selection List
Factory Default — Erase
Changeable During Run — No
Up/Down Frequency (up) Mode
Up/Down Frequency (down) Mode
F108 F108
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