Hitachi CONVENTION 14 instruction manual 4 28

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
Code
Terminal
Symbol FunctionName State Description
ON Accelerates (increases output frequency) motor
from current frequency
27 UP Remote Control UP
Function(motorized
speed pot.)OFF Output to motor operates normally
ON Decelerates (increases output frequency) motor
from current frequency
28 DWN Remote Control
DOWN Function
(motorized speed pot.)OFF Output to motor operates normally
ON Clears the Up/Down frequency memory29 UDC Remote Control Data
Clear OFF No effect on Up/Down memory
Validfor inputs:C001~C005
Requiredsettings A001 = 02
Notes:
xThis feature is available only when the frequency
command source is programmed for operator
control. Confirm A001 is set to 02.
xThis function is not available when [JG] is in use.
xThe range of output frequency is 0 Hz to the value
in A004 (maximum frequency setting).
Example (default input configuration shown—see
page 3–49):
See I/O specs on page 4–6.
xThe minimum ON time of [UP] and [DWN] is 50 ms.
xThis setting modifies the inverter speed from using F001 output frequency setting as a starting point.
54321L
PCS P24
UP
DWN
428
4 28
Operations and
Monitoring