ABB i-bus
®
KNX
Parameters
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 251
7.8.1.1.1.2.3.1
—
Dependent Parameter
Number of changes until adjustment
Options:
30…500…65,535
This parameter determines the number of valve controls after which automatic adjustment is to be
triggered.
The adjustment counter is incremented by 1 at the end of a drive adjustment.
Note
If the parameterized number of valve controls is reached, the reference adjustment is started.
The closed position is then moved past by 5 % of the parameterized switch on time based on the
last control value for the valve drive (at least 1 second, not more than 60 seconds). This function
cannot be interrupted. Thereafter, the currently calculated control value is approached, and the
adjustment counter is set to zero.
Example:
Switch on time for valve drive from 0 to 100 %: 100 s
Current control value: 50 %
Reference adjustment to 0 %: 50 s + 5 s
50 s = normal movement time from 50 % to 0 % + 5 s = 5 % of 100 s
The following events trigger a reference adjustment:
•
Bus voltage recovery
•
ETS reset
•
Download
•
Reset of a remedied fault (via
Reset
button or via
Reset fault on valve output X
group object)
The output is only actuated if the calculated change in the valve position (based on the opening
time for the drive and the change in the control value) is greater than one second. This condition
prevents small position changes and protects the drive against unnecessary movements. The wear
on the drive is reduced.
7.8.1.1.1.3
Open/close signal
7.8.1.1.1.3.1
—
Dependent Parameter
Valve drive operating principle, de-energized
This parameter is visible if, in the
Valve output
parameter, the
Thermoelectric (PWM)
or
Open/
Close signal
option has been selected.
Options:
Closed
Open
This parameter determines the function of the valve drive.
•
Closed
: If no current flows in the valve drive, the valve is closed. If current flows in the valve
drive, the valve opens.
•
Open
: If no current flows in the valve drive, the valve opens. If current flows in the valve drive,
the valve then closes.