Hitachi CONVENTION 14 Instruction Manual page 177

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It is possible for the inverter to retain the frequency set from the [UP] and [DWN]
terminals through a power loss. Parameter C101 enables/disables the memory. If
disabled, the inverter retains the last frequency before an UP/DWN adjustment. Use
the [UDC] terminal to clear the memory and return to the original set output frequency.
Option Terminal
Code Symbol
27 UP
28 DWN
29 UDC
Valid for inputs:
Required settings
Notes:
This feature is available only when the frequency
command source is programmed for operator
control. Confirm A001 is set to 02.
This function is not available when [JG] is in use.
The range of output frequency is 0 Hz to the value
in A004 (maximum frequency setting).
The minimum ON time of [UP] and [DWN] is 50 ms.
This setting modifies the inverter speed from using F001 output frequency setting as a starting point.
Function Name
Remote Control UP
Function (motorized
speed pot.)
Remote Control
DOWN Function
(motorized speed pot.)
Remote Control Data
Clear
C001~C005
A001 = 02
State
ON Accelerates (increases output frequency) motor
from current frequency
OFF Output to motor operates normally
ON Decelerates (increases output frequency) motor
from current frequency
OFF Output to motor operates normally
ON Clears the Up/Down frequency memory
OFF No effect on Up/Down memory
Example (default input configuration shown—see
page 3–49):
5
See I/O specs on
Description
DWN UP
4 3 2 1 L PCS P24
page 4–6.