ABB i-bus
®
KNX
Parameters
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 264
7.8.1.2.4
Valve purge
Options:
Deactivated
Automatic or triggered by object
Triggered by object
Valve purging by the device is enabled using this parameter. This parameter is used to trigger a
device opening and closing cycle during times when the valve is not in use to prevent the valve
from seizing.
•
Deactivated
: Valve purging is deactivated.
•
Automatic or triggered by object
: Valve purging can be triggered via a group object or it occurs
automatically after an adjustable time has elapsed. The group objects
Status Valve purge
and
Activate valve purge
as well as the parameters
Purge cycle in weeks
,
Reset purge cycle from
control value greater than or equal to
and
Send group object "Status Valve purge"
are enabled.
•
Triggered by object
: The valve purging can be triggered via a group object. The group objects
Status Valve purge
and
Activate valve purge
as well as the parameters
Reset purge cycle from
control value greater than or equal to
and
Send group object "Status Valve purge"
are enabled.
During the valve purging, the valve is opened completely once and closed again, corresponding to
the values set in the
Valve drive opening/closing time
parameter.
The purging cycle time is restarted if automatic valve purging has been activated at start-up of the
device.
The purging cycle time will be restarted at the end of the actual purging period. The parameterized
period of valve purging is included here.
The purging cycle with an active automatic valve purge is reset and restarted if:
•
A manual valve purge is triggered via the group object
Activate purge
.
•
The parameterized value (in Reset purge cycle from...) is exceeded. The purging cycle is only
restarted once the parameterized value is reached or exceeded.
7.8.1.2.4.1
—
Dependent Parameter
Purge cycle in weeks
This parameter is only visible if the
Automatic or triggered by object
option has been selected.
Options:
1…4…12
The cycle for the automatic valve purging is set using this parameter.
The internal automatic purge timer starts directly after a download. The time is reset with each
download.
The time is reset as soon as purging is completed. This can occur either through automatic purging
or via the group object
Trigger purge
.
Note
After bus voltage recovery and download, the automatic purging cycle is restarted. The time be-
fore bus voltage failure is not considered.
If the purge cycle is triggered simultaneously for two valves, the purging is undertaken sequen-
tially and not at the same time.
7.8.1.2.4.2
—
Dependent Parameter
Reset purge cycle from control value greater than or equal to
Options:
1…99
Hereby, the purge cycle is reset to the set control value if it is exceeded.
