Burkert Type 8619 - Manual (Page 52)

50
Adjustmentandcommissioning
8.10.13. configuring an "onoff" control function
This function is used to set the on/off control.
A conductivity control system can be combined with the "time dosing" function (see chap. 8.10.15) to carry out a
prebleed step before dosing.
Once the function has been configured and activated, the result "Fx:" calculated is available in the list of
process variables on the "M0:MAIN" board. This list appears in the output configuring, user view config-
uring and datalogging menus to:
• Assign the result "Fx:" calculated to a physical output (analogue, AO, or digital, DO) (see chap. 8.10.22
and 8.10.22).
• Display the result "Fx:" on one of the user defined "Ux" views: see chap. 8.10.8.
• Logging the values of "Fx:" using the datalogger: see chap. 8.10.18.
Setpoint (SP)
prebleed
ONOFF fallback
position
"Time dosing"
function ("Dos. St.")
Process input
(PV)
result (Fx: CMD1)
System
switch
Figure 38 : "ONOFF" function
1
13:40
1
0
0
2010/06/29 F2:ONOFF
250.0
µS/cm
PV
500.0
µS/cm
SP
0.00
%
CMD1
No Link
F3 Dos.St
Value of the process variable chosen
Value of the setpoint
Result of the ONOFF function
No associated time dosing
press this dynamic key to enter the setpoint value.
SETP MENU
Figure 39 : Example of a view of an "ONOFF" function in Process level with no associated time dosing
Type 8619
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