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ABB i-bus KNX
© 2010 ABB STOTZ-KONTAKT GmbH
Commissioning
How does a two-way changeover circuit function?
Only the corresponding output of the assigned fan speed is switched
on with the parameterisation as a changeover switch.
The delay time between the speed switchover and a minimum dwell
time in a valve speed are programmable.
The minimum dwell time in a fan speed is only active in automatic
mode.
How does speed switching function?
With step switch control, no erratic and sudden switch on of the fan
is possible. The individual fan speeds are activated consecutively
(outputs switched on) until the required fan speed is achieved.
The parameterised delay time between two fan speeds has the effect
that the current fan speed must be switched on for at least this time
before the next valve speed is switched on.
The parameterised minimum dwell time in a fan speed has the same
effect as a changeover switch, i.e. it is only active in automatic mode
and is added to the switchover delay.
Changeover switch: The following parameter appears:
Delay between fan speed switching
in ms [50...5,000]
Option:
50...500...5,000
A switchover delay can be programmed with this parameter.
As this time is a fan specific factor, it is always considered.
Fan speed on bus voltage failure
Option:
unchanged
OFF
Fan speed on bus voltage recovery
Options:
unchanged
OFF
1
2
3
unchanged: The fan speeds of the fan remain unchanged.
OFF: The fan is switched off.
1, 2 or 3: The fan switches to fan speed 1, 2 or 3.
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