The object flags define the bus behavior of the object they represent.
6 different object flags are defined:
- C: the Communication flag
- R: the Read flag
- T: the Transmit flag
- W: the Write flag
- U: the Update flag
- I: the Initialization flag
If set:
C-flag
All other flags are enabled for this object.
R-flag
The device will for this object react to a GroupValueRead telegram coming from the bus, i.e. it will send a GroupValueResponse telegram to the bus.
T-flag
The device will for this object transmit any updated object value, i.e. it will send a GroupValueWrite telegram to the bus. For a push button object this e.g. means that a rocker representing this object was manipulated.
W-flag
The device will for this object react to a GroupValueWrite telegram coming from the bus, i.e. it will overwrite the object value. For a switch actuator this e.g. means that a relay representing this object will be opened or closed.
U-flag
The device will for this object react to a GroupValueResponse telegram coming from the bus, i.e. it will overwrite the object value. For a switch actuator this e.g. means that a relay representing this object will be opened or closed.
I-flag:
The device will for this object after device reset send a GroupValueRead telegram. The purpose is to get the object value via a GroupValueResponse. The reason for the device reset could be a power failure, an explicit bus reset or an explicit device reset request via a telegram.