Siemens LMV5 Series Basic Documentation page 267

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At curvepoint 2 and at the highest curvepoint, the system adapts itself when storing.
This is accomplished by measuring the delay time (τ) of the boiler plant. Based on
these values, the PI control parameters, the controller locking time after load
readjustment and the min. value delay for the O
measure the time constant (τ), the burner will be driven back to the ratio curve. With the
other curvepoints, the system returns to the ratio curve without adaption after setting
the O setpoint. After setting all points, O
2
18.11.6 Checking and changing the controller parameters
The adapted controller parameters and the measured time constant (τ) of the boiler can
be viewed on the «Controller parameters» menu, and changed, if required.
The O2 setpoint must lie at least 0.5 % above the O2 min. value and 1 % below the O2
ratio value.
Basic Documentation LMV51...
18 Addendum 4: LMV52... with O2 trim control and O2 module
h e r n -
r f e n -
2
trim control can be activated.
2
> E N T E R
> E S C
monitor will be calculated. To
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CC1P7550en
01.10.2003