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5.2.3
(2)
(3)
(4)
(5)
* This
circuit
receives
operation,
stop,
forward
operation,
reverse
operation
and
multistage
speed
commands
for
execution.
e This
circuit
commands
the
display
on
the
digital
operation
panel.
e Stall
is
prevented
when
overcurrent
and
overvoltage
occur.
The
analog
module
unit
is
an
interface
circuit
for
trans-
mitting
analog
frequency
command
and
analog
detecting
signal
to CPU.
The
interface
circuit
unit
transmits
to
CPU
various
external
commands,
including
operation/stop
commands,
multistage
speed
command,
jogging
operation
command
and
reset
command
given
by a digital
signal.
The base
drive
circuit
unit,
receiving
a sine
coded
PWM
signal
controlled
by CPU,
drives
the
inverter
module.
The
digital
operation
panel
unit
allows
various
displays,
using
a 16-digit
LCD,
and
also
has
a built-in
control
Protection
description
For
HFC-VWS3
protecting
description
and
display
contents,
refer
to the
"Troubleshooting
and Message
Contents"
paragraph
given
under
para.
12.
-~ 14 -
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