Gira KNX 2139 00 Product Documentation page 67

Valve outputs | Valve output - General
– Case 3
Command value change, e.g. from 80% to 30% during the opening phase of
the valve (opening phase too long) (see figure 10).
Before the reception of the new command value (30%), the old setpoint (80%)
was active. The new command value is received during the opening phase of
the valve. At this point, the actuator detects that it is necessary to cancel the
opening phase immediately and close the valve, so that the duty factor corres-
ponds to the new command value (30%). The cycle time remains unchanged,
but the starting time of the period is shifted automatically.
The new duty factor is set immediately after the reception of the new com-
mand value.
Image 10: Example of a command value change 80% -> 30% during the opening
– Case 4
Command value change, e.g. from 30% to 80%, during the opening phase of
the valve (see figure 11).
Before the reception of the new command value (80%), the old setpoint (30%)
was active. The new command value is received during the opening phase of
the valve. At this point, the actuator detects that it is still possible to extend the
open phase, so that it corresponds to the new command value (80%). The
cycle time is not affected by this operation.
The new duty factor is set immediately after the reception of the new com-
mand value.
Image 11: Example of a command value change 30% -> 80% during the opening
– Case 5
Command value change, e.g. from 30% to 80%, during the closing phase of
the valve (see figure 12).
Before the reception of the new command value (80%), the old setpoint (30%)
was active. The new command value is received during the closing phase of
the valve. At this point, the actuator detects that it is still possible to reduce the
closing phase, so that it corresponds to the new command value (80%). The
cycle time remains unchanged, but the starting time of the period is shifted
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
phase of the valve (opening phase too long)
phase of the valve
Page 67 of 257