Econ OP320 - Function Key (Switch Quantity Operation)

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of
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9
F
unction key (switch
quantity operation
)
C
lick
button to place the function key, select “>” button,
the
correspond address is
M20, its function is
momentary
set
M20 relay to
be
ON, and
keep
the hand
diagram
. It
status
s that when
you
click on the “>” button, M20
of PLC
is set to
be
ON, an
d the
motor
begins to
run forward
.
(PLC program, us
e
s
M20 to trigger Y0); when
you
releas
e
the “>”
button
,
M21
of PLC
goes back
to
the
OFF
state,
, and the motor
will
stop
running.