Watson-Marlow 720UN and 720SN User Manual
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14.10 Auto-restart
This pump offers an auto-restart feature. When active on power loss, it will restore
the pump when power returns to the operating state it was in when power was lost.
It does not operate when powering down in the middle of a dose; when the pump is
restarted, it will await a press on the
START
key to begin the interrupted dose again.
Auto-restart is retained while the pump is switched off. When the pump starts run-
ning look for the
!
symbol on the display. This
!
symbol indicates that the pump is set
for auto-restart.
Do not use auto-restart for more than 100 starts per
hour. We recommend remote control where a high
number of starts is required.
To turn the auto-restart facility on:
Turn off the mains power switch at the rear of the pump.
Depress the
START
key while switching on the mains power switch at the rear
of the pump.
To turn the auto-restart facility off:
Turn off the mains power switch at the rear of the pump.
Depress the
STOP
key while switching on the mains power switch at the rear of
the pump.
14.11 Manual operation and remote
digital inputs and outputs
The remote run/stop, direction and leak-detected inputs are operational.
The remote status outputs are all fully functional.
The
STOP
key acts as an emergency stop. The run/stop input will not start the pump
in manual mode, but once the
START
key has been pressed, the remote run/stop
input will stop and start the pump according to its operational state.
If you invert the operation of the remote run/stop switch to operate as open=stop,
you must connect the +5V terminal to the i/p terminal on the Run/stop input con-
nector (J4), to be able to start the pump from the keypad. See 19.6
Run/stop input
.
If
STOP
is pressed the remote run/stop switch will have no effect.
You cannot invert the polarity of the remote direction signal.
UN
