Remote Control Up And Down Functions - Hitachi L300P Series Instruction Manual

4–30
Using Intelligent Input Terminals
Remote Control
Up and Down
Functions
The [UP] [DWN] terminal functions can adjust the output frequency for remote control while
the motor is running. The acceleration time and deceleration time used with this function is the
same as for normal operation ACC1 and DEC1 (2ACC1,2DEC1). The input terminals operate
as follows:
• Acceleration - When the [UP] contact is turned ON, the output frequency accelerates from
the current value. When it is turned OFF, the output frequency maintains its current value.
• Deceleration - When the [DWN] contact is turned ON, the output frequency decelerates
from the current value. When it is turned OFF, the output frequency maintains its current
value.
In the graph below, the [UP] and [DWN] terminals activate while the Run command remains
ON. The output frequency responds to the [UP] and [DWN] commands.
Output
frequency
[UP]
[DWN]
[FW, RV]
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.
Opt.
Symbol Function Name
Code
27 UP Remote Control
UP Function
28 DWN Remote Control
DOWN Function
29 UDC Remote Control
Data Clear
C001, C002, C003, C004,
Valid for inputs:
C005
A001 = 02
Required
C101 = 01 (enables memory)
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 Remote Control Up/Down function
varies the inverter speed by directly writing to
the F001 output frequency setting.
Input
Description
State
ON Accelerates (increases output frequency)
motor from current frequency
OFF Output to motor operates normally
ON
Decelerates (decreases 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: (Requires input configuration—
see page 3–43. Jumper position shown is
for –xFU/-xFR models; for –xFE models,
see page 4–11.)
UDC
TH FW
5
P24 PLC CM1
See I/O specs on page 4–8.
t
DWN
UP
4 3 2 1