Bus Voltage Failure; Reaction At Bus Voltage Recovery, Download And Reset; Priorities - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Planning and Application
4.5

Bus voltage failure

The device can no longer be controlled at a bus voltage failure. The outputs switch off and the valve drives
assume their position in a no-current state (open or closed). Manual operation is not possible during a bus
voltage failure.
4.6

Reaction at bus voltage recovery, download and reset

Behaviour
Output control
Monitoring control
value
Forced operation
Block
Valve purge
Manual operation
4.7

Priorities

The priorities for telegram processing are defined as follows:
1. Overload/short circuit current
2. Bus voltage failure/recovery
3. Manual operation
4. Block
5. Forced operation
6. Valve purge
7. Control value after control fault
8. Control values (1 bit/byte)
Note
1 corresponds to the highest priority.
50 2CDC 508 101 D0201 | VAA/S x.230.2.1
At bus voltage recovery
Parameterizable preferred
position at bus voltage
recovery is set
Monitoring time will be
restarted
Active, provided that forced
operation was also active
before bus voltage failure
Inactive, communication object
value is reset
Valve purge is inactive.
Communication object value
Status valve purge = 0.
Injection cycle time restarts
(provided that automatic valve
purging is activated)
Can be parameterized
At download (DL)
Control with the
communication object value
before download
Monitoring time will be
restarted. Communication
object value unchanged
Inactive, communication
object value is reset
Inactive, communication
object value is reset
Valve purge is inactive.
Communication object value
Status valve purge = 0.
Injection cycle time restarts
(provided that automatic
valve purging is activated)
Can be parameterized
At reset
Off
Monitoring time will be
restarted. Communication
object value is reset
Inactive, communication
object value is reset
Inactive, communication
object value is reset
Valve purge is inactive.
Communication object value
Status valve purge = 0.
Injection cycle time restarts
(provided that automatic
valve purging is activated)
Can be parameterized