Using Intelligent Input Terminals
Oper
ations
a
nd Moni
tor
ing
4–38
General Purpose
Inputs 1–8
Refer to the Easy Sequence Instruction Manual for information on how to configure and use the
general purpose inputs MI1 to MI8.
Analog Holding
Command
The analog holding function causes the inverter to sample and hold the analog command
(external analog input). The hold operation begins when the intelligent input [AHD] (assign
option code 65) turns ON. While [AHD] terminal is ON, the Up/Down function uses the held
input level as the reference speed (frequency) value. Set parameter C101 (Up/Down memory
Mode Selection) = 01 to store the last frequency adjusted by UP/DWN in memory.
If the inverter power is cycled (OFF and ON) or the [RS] reset terminal receives a reset (ON
and OFF) while [AHD] is ON (holding analog value), the data held at the moment of power
OFF or Reset ON will be used.
The wave form below shows a typical sequence for use of the Analog Holding Command.
NOTE:
Frequent use of the Analog Hold function may damage the corresponding flash
memory register in the inverter.
Opt. Code
and
Symbol
56=[MI1]
57=[MI2]
58=[MI3]
59=[MI4]
60=[MI5]
61=[MI6]
62=[MI7]
63=[MI8]
Valid for
Inputs
[1] to [8]
Required
Settings
See Easy
Sequence
Default
terminal
Requires
config.
Opt. Code
65
Symbol
[AHD]
Valid for
Inputs
[1] to [8]
Required
Settings
C101
Default
terminal
Requires
config.
Analog input command
Analog Holding Command [AHD]
Analog hold ON
t
0
Output frequency command
0
1
0
