Burkert Type 8635 - Manual (Page 131)

8635 - 129
O
PERATING VIA THE
HART
HAND TERMINAL
(HART)
NOTE Contrary to the execution of PTUNE via the SIDE Control, the process value PV, and
hence the starting value for the optimization step, cannot be changed by switching over
to the MANUAL mode and opening and closing the valve.
After confirmation with F4 - OK, the process value PV is read in for 10 s. You thus have the possibility
of checking whether the actual value is constant and you can decide whether the PTUNE function
should be initiated (enter Yes) or whether the process value PV should be read in again for a further
10 s (enter No).
User query
After entry of Yes, you now have the possibility of initiating control parameter optimization by
specifying a setpoint step.
Start PTUNE by choosing a new setpoint SP
Confirm the message with F4 - OK.
On the HART hand terminal, the entry mask for the setpoint appears.
Entry mask for specifying a setpoint step.
Enter the new value and confirm with F4 - ENTER.
Self-optimization of the process controller runs autonomously. On the HART hand terminal, the
following message appears:
Running PTUNE
Running of the function PTUNE is ended by an OK message.
OK message after completion of
the function PTUNE.