Hitachi WJ200-001S Instruction Manual page 252

Analog Command Hold
This function allows you to make the inverter hold the analog command input via the
external analog input terminal when the AHD terminal is made ON.
While the AHD is turned ON, the up/down function can be used based on the analog
signal held by this function as reference data.
When "" is specified for Up/down
memory mode selection (), the result
of up/down processing can be stored in
memory.
If the inverter power is turned on or the
RS terminal turned off with the AHD
terminal left turned on, the data held
immediately before power on or turning
off the RS terminal will be used.
Set frequency remains when the inverter is switched with SET terminal with AHD on.
Turn AHD terminal off to re-hold the set frequency.
Frequent use of this function may result in a shorter in memory component of the
inverter.
Option Terminal
Code Symbol

AHD Analog command hold
~
Valid for inputs:
Required settings
Notes:
Function Name State
OFF
AHD
Analog
input
command
Frequency
command
ON Hold the analog input value
Does not hold the analog input value
Example (default input configuration
shown—see page
7 6 5
See I/O specs on
ON
Hold the data
Description
3-85):
AHD
4 3 2 1 L
PLC
page 4–6.
445
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