Positions - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Planning and application
4.4

Positions

Reference movement
Each output continuously determines the current position of the blind/shutter as well as the position of the
slat angle using the duration of the individual movements. Over longer periods of time, slight inaccuracies
in position detection can occur due to temperature variations and aging processes. For this reason, the
JRA/S use the upper and lower end position for clear determination of the current position of the
blind/shutter. Each time the blind/shutter is located in the upper or lower end position, the position is
updated in the memory of the device.
If, during normal operation, the end positions are not reached, then a telegram can be used to trigger a
reference movement to the very top or the very bottom. Depending on the parameterization, after the
reference movement, the blind/shutter will remain in the reference position or will move back to the saved
position.
Direct and indirect movement to the position
The Move to position parameter can be used to set whether the blind/shutter is to move directly from its
current position to the target position in the case of a movement command, or whether, on receipt of a
Move to position telegram, a reference movement is to be carried out indirectly via the top or indirectly via
the bottom.
Move to position 0...100 %
The blind/shutter can be moved into any position via an 8-bit value. In the Control with slat adjustment
(blind) operation mode, the slats can also be positioned into any angle via an 8-bit value. In this way, it can
be decided for each movement telegram to which position the blind/slat should move, e.g. it is possible to
set the position via a display or a visualization terminal.
Move to preset position
For each output, it is possible to parameterize up to 4 preset positions individually, which are then recalled
via a 1 bit telegram. When moving into one of these preset positions, the target position must be set in
advance, either via the parameters during programming or by setting a preset position. This preset target
position can then, for example, be recalled as often as required by pressing a push button.
116 2CDC 506 051 D0204 | JRA/S