User guide

53
Adjustment and commissioning
CMD SAFE: Confirm (choose "Mode: ON") or do not confirm (choose "Mode:OFF") the use of a fallback
position on the output when the "System switch" event (see chap. 8.10.17) has the state "ON". When use of the
fallback position is confirmed, enter a fallback position value of between 0 and 100% for each output.
press this dynamic key to enter
the setpoint value.
1
13:40
1
0
0
F2:ONOFF
250.0
µS/cm
PV
500.0
µS/cm
SP
0.00
%
CMD1
Off
F3 Dos.St
Measured value of the process variable chosen
Value of the standard setpoint
result of the ONOFF function
Associated Time dosing; dosing status is "Off".
See Figure 41 for the various states of a dosing operation
SETPMENU
2010/06/29
Figure 42 : Example of a view, in Process level, of the ONOFF function associated with a time dosing function
8.10.14. Configuring a PID (proportional integral drift) control
function
This function is available as an option. See chap.. 8.10.4.
Setpoint (in-
ternal or ex-
ternal) (SP)
Process
input (PV)
SplimitCutoff
PID function
A single
channel
Two channels
Direction of the
actuator
Demarcation of
the result
Fallback
position
PID function
Direction of the
actuator
Demarcation of
the result
Fallback
position
system
switch
result
(Fx:PID1)
result
(Fx:PID2)
Figure 43 : PID function
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.
Refer to chap. 8.9 to access Parameters menu.
Type 8619
english