User`s guide

3-12
Installation 3
The Pause/Resume Input
The Pause/Resume input is used to
pause and restart the 305 pump using
an external contact.
This input is only activated when
the input changes from open to
closed or from closed to open. The
operation of each mode is shown in
the table opposite.
In the Program mode, this input can be configured
to obtain a pause with or without flow. This choice
is offered inside the
software branch I/O,
within the screen :
The default value is with (w) flow, press change to
obtain a pause without (w.o) flow. During a pause
with flow, the flow will continue with the flow rate
and composition which existed when the pause
input was activated. The program will continue
from the same point in the from the same point in
the program when the resume contact is opened.
The pause without input is of particular interest
when the 305 is used as a metering pump to feed a
reagent in high pressure reactors. In this application,
the 305 can wait for correct values of external
parameters (temperature, pressure, composition)
before adding more reagent.
The IN # 1 Input
This input only operates in
the Program mode. It is fully
programmable. It can be used
to make the program wait
until a piece of equipment is
ready.
An example for this input is
when the pumping system is
waiting for a signal from a
sample injector or a fraction
collector.
Input/Output Connections
Mode Input Result
Flow Closed Pause Flow
Open Resume Flow after Pause
Dispense Closed Pause Flow
Open Resume Flow after Pause
Program Closed Pause Program
Open Restart Program
I. Pause/Prog is w. flow
Timed event Input Result
Wait input # 1 Closed Open Wait IN # 1 is closed
Wait input # 1 Closed Closed Continue with program
Wait input # 1 Open Open Continue with program
Wait input # 1 Open Closed Wait IN # 1 is open
For more information, see
Programming the inputs in
Chapter 4.