Watson-Marlow 720DuN User Manual
73
If the remote direction input is active and the direction-enable link is applied,
the
DIRECTION (SHIFT, 1)
key is disabled. If keypad lock is set, only
STOP
and
START
(available as an extended keypress to toggle keypad lock) are
active.
The pump displays whichever of five auto running screens is appropriate
according to the previously selected auto mode - 4-20mA, 1-5V or 0-10V with
or without scaling in place.
The auto running screens display four pieces of information: the speed at which
the pump rotates after receiving a low signal on Analogue 1 (4mA, 1V or 0V);
the speed at which the pump rotates after receiving a high signal on Analogue
1 (20mA, 5V or 10V); the set speed (that is: the speed at which the pump is
currently rotating according to the analogue speed signal and the analogue
scaling signal if scaling is set); and the flow rate in the units selected (see 18.8
Flow units
). The scaling percentage is also displayed if it is set.
Note
: The dis-
play shows low signal speed, high signal speed, cumulative volume and run
time if that option was selected during set-up (see 18.3
Display
), or if it is
selected by pressing
ENTER
or
START
. The scaling percentage is also dis-
played if it is set.
If manual scaling is enabled using the Setup menu (see 18.2
Analogue
), the
scaling percentage can be adjusted between 0% and 100% using the
UP
and
DOWN
keys.
The pump responds to remote digital inputs. If the run/stop input stops the
pump, the bottom line of the auto running screen shows “Remote stop”. When
it starts the pump again, this will disappear and the pump returns to normal
running mode.
If the pump is stopped because a leak is detected, the screen displays “LEAK
DETECTED. Check and reset, then press Stop”. See 25.1
Error codes
.
The remote status outputs operate fully.
How to get out of auto operation
If you entered auto operation by pressing
AUTO (SHIFT, 9)
and selecting
Analogue
, return to manual operation by pressing
MAN (SHIFT, 6)
.
If you entered auto operation by making the remote auto / manual input go
high, leave auto operation by making that input go low (0V).
The pump returns to manual operation and retains the set speed and run
status from its previous operation in analogue mode.
