Burkert Type 8793 - Manual (Page 99)

99
Start-Up
25.5.2.1. Preparatory measures for execution of P.TUNE in the MANUAL
operating state
Moving.process.actual.value.PV.to.the.operating.point:
Key Action Description
Setting.on.the.process.level:
/ Select PV The process actual value PV is indicated on the display.
MANU Press
Change to MANUAL operating state.
The input screen for manually opening and closing the valve is
displayed.
Open valve OPN or By opening or closing the control valve, move the process actual
value to the required operating point.
Close valve CLS
As soon as the process actual value PV is constant, the P.TUNE function can be started.
Table 48: P.TUNE; preparatory measure for running X.TUNE in the MANUAL operating state
25.5.2.2. Preparatory measure for execution of P.TUNE in the
AUTOMATIC operating state
By inputting a process set-point value SP, move the process actual value PV to the operating point.
Observe.the.internal.or.external.set-point.value.default.for.the.input.
(P,CONTROL → SETUP → SP-INPUT → internal/external):
For.internal.set-point.value.default:..Input the process set-point value SP via the device keyboard
see description below "Table 49" ).
For.external.set-point.value.default:..Input the process set-point value SP via the analog set-point value
input.
Inputting.a.process.set-point.value:
Key Action Description
Setting.on.the.process.level:
/ Select SP The process set-point value is indicated on the display.
INPUT Press
The input screen for inputting the process set-point value is
displayed.
/ Input value
<– Select decimal place
Increase value
The selected set-point value SP should be near the future operating
point.
OK Press
Acknowledge input and return to the display of SP.
Table 49: P.TUNE; preparatory measure for running X.TUNE in the AUTOMATIC operating state
The process variable PV is changed according to the set-point value default based on the factory default PID
parameters.
→
Before running the P.TUNE function, wait until the process actual value PV has reached a stable state.
English
Type 8792, 8793