Hart, Hart) – Burkert Type 8635 User 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.