Burkert Type 8635 - Manual (Page 130)

128 - 8635
O
PERATING VIA THE
HART
HAND TERMINAL
(HART)
If the message P.Q’LIN error X appears on the display, this indicates an error.
X stands for the error number. In the chapter Maintenance and Error Elimination on the Process
Controller, you will find an explanation of this error number.
On pressing F4 - OK, you return to the main menu.
OK message after completion of
the function PQLIN
PTUNE
PTUNE serves to determine the optimal control parameters KP, TN, TV and may be started under Main -
PTUNE, provided that the menu item P.CO TUNE has been previously set to active in the menu
Configuration under P-CONTROL.
Procedure
Select PTUNE via the operating key or and then start the function via the operating key .
The following message appears:
SET PTUNE ON
Confirm with the key F4 - OK.
PTUNE is ready to start. The following message appears:
NOTE The function PTUNE can be aborted at any time with the function key F3 – ABORT.
This message serves to explain the method of functioning of PTUNE :
The current process value PV is used as a starting value for the optimization step. It is important here
that the actual value has reached equilibrium. By specification of a setpoint step, parameter optimization
can be started.
Message after the start of
the PTUNE function.