ABB i-bus KNX Product Manual page 146

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ABB i-bus KNX
Parameters
With forced operation 2 bit there can be two forced operation states (forced operation On and forced
operation Off). These states are activated using the 2-bit group object. The first bit defines whether the
forced operation is active (bit 1 (high) = 1) or inactive (bit 1 (high) = 0), the second bit decides on the Off
(bit 2 (low) = 0) or On (bit 2 (low) = 1) state.
Value
0
1
2
3
Table 17: Forced operation states
For information on the priority of the forced operation in comparison to the other properties of the device,
see Priorities.
The state of the forced operation is saved on bus voltage failure and retrieved again on bus voltage
recovery. If forced operation was active on bus voltage failure, it is also active after bus voltage recovery.
Forced operation is deactivated on an ETS reset.
Forced operation overrides the outputs and places them in a defined state. However, this action has no
effect on the control values sent by the controller via the bus or the master/slave communication;
this communication continues to take place.
So that an actuator actuated by the controller in this device behaves the same, forced operation must be
correspondingly parameterized also on this device and it must be linked to the same group address.
144 2CDC508220D0211 Rev. A | VC/S 4.x.1
Note
Bit 1
0
0
1
1
Note
Note
Bit 0 Status
0 Inactive
1 Inactive
0 Forced OFF
1 Forced ON