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Building Technologies Division User Manual LMV5... CC1A7550.5en
COx supervision and control 07.07.2015
4.8 Display on the AZL52
If a COx signal occurs, a notification is output on the AZL52.
The notification is automatically deleted if no further COx signals are present.
4.9 Displaying the O2 trim controller status
Also refer to the chapter Displaying the O2 trim controller status in the LMV5 Basic
Documentation (P7550).
The status of the O2 trim controller can be read out with the AZL52 via data point State
O2 Ctrl.
deactivated The O2 trim controller is not active. The system operates along the
ratio control curves.
locked The manipulated variable of the O2 trim controller is held at the last
value.
LockTStart Locking time following startup until the O2 trim controller is initialized
or released. The locking time is necessary in order to ensure that the
actual O2 value is measured. The O2 trim controller is still
deactivated or locked
InitContr The O2 trim controller is initialized. The O2 trim controller is locked.
LockTLoad The O2 trim controller is locked due to a load change.
active The O2 trim controller is active and operates to the O2 setpoint.
LockTCAct If switching functions (control interventions by the O2 trim controller)
are active, the O2 trim controller is locked for 2 x Tau.
LockCOx If the manipulated variable is affected due to the COx signal, the O2
and COx controllers are locked.
Process data
display values
State O2 Ctrl (deactivated, locked, LockTStart, InitContr,
LockTLoad, active, LockTCAct, LockCOx)
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