Burkert Type 8630 - Manual (Page 107)

8630 - 105
O
PERATING THE PROCESS CONTROLLER
P.Q’LIN
Starting the routine for linearization of the process curve
With the activation of the function P.CONTRL, the functions P.Q’LIN, which are required for process
control, are copied into the main menu. Via these functions, the program is started for autonomous
determination of the fixed points for a correction characteristic.
The program increases in 20 steps the valve stroke from 0 to 100 % and measures the associated
process variables. The pairs of values of the correction characteristic are stored as a freely
programmable characteristic under the menu item
CHARACT/CHAFREE and may be viewed under this
menu item.
If the menu item CHARACT was not transferred under the menu item ADDFUNCT to the main menu,
this is done automatically on execution of the function P.Q’LIN. At the same time, the menu item
CHARACT/CHAFREE is activated.
This function makes sense only when flow control is to be carried out.
➔ ➔ ➔ ➔ ➔ You start the routine for linearization of the process characteristic by calling up the menu item P.Q’LIN
in the main menu and pressing the MANUAL/AUTOMATIC key for 5 seconds.
Display Description
P.Q’LIN 5 Countdown from 5 to 0 for starting
P.Q’LIN 4 der Routine
:
P.Q’LIN 0
¦ P.Q’LIN 0 Display of the fixed point that is being approached at the moment
¦ P.Q’LIN 1 (der Fortgang wird durch einen sich drehenden Balken am linken
¦ P.Q’LIN 2 Rand des Displays angezeigt)
¦ P.Q’LIN 3
:
P.Q’LIN.END (flashing) End of routine
Q.ERR X.X Message on occurrence of an error
(shown on the right is the error number - see chapter
Maintenance
process controller)
Display during call-up and execution of the routine
NOTE The function P.Q’LIN can only be started when the menu item P.CONTRL / P.COINP /
INP FREQ or item P.CONTRL / P.COINP / INP420 has been selected.