Watson-Marlow 720DuN User Manual
72
23 Automatic control and operation
Check that the pump is ready to run before selecting automatic operation. Remote
control signals may start the pump without warning.
How to get into auto operation
While the manual mode main screen is displayed, press
AUTO (SHIFT, 9)
, or
apply a high signal (5-24V) to the remote auto / manual input.
If auto entry was triggered remotely, the pump responds to the analogue signal
as soon as this is done and shows the “AUTO” icon.
If auto entry was triggered using
AUTO (SHIFT, 9)
, the pump offers three
choices:
Analogue
,
Manual
and
Network
. Use the
UP
and
DOWN
keys to
choose and press
ENTER
to confirm.
Selecting
Manual
returns the user to the manual mode main screen. See 14
Manual operation
.
Selecting
Network
puts the pump into network (RS485) mode. See 24
Network control and operation
.
Selecting
Analogue
puts the pump into analogue mode. It responds to the
analogue signal as soon as this is done and shows the “AUTO” icon.
The pump is automatically switched into auto-restart mode and displays the
!
icon. The only keys active are
STOP
,
MAN (SHIFT, 6)
,
DIRECTION (SHIFT,
1)
,
START
and
ENTER
(the last two available only to change the display—see
18.3
Display
; with
START
also available as an extended keypress to toggle
keypad lock).
UP
and
DOWN
keys are available if manual scaling has been set
(see below).
