ABB SA/S 12.16.6.1 Product Manual - Knx Commissioning
ABB i-bus
®
KNX Commissioning
SA/S | 2CDC 505 056 D0207 115
Connected valve type
Options: normally
closed
normally
open
Using this parameter, the valve type for the connected valve is set.
How does a normally closed valve behave?
If no current flows in the control circuit, the valve is closed. The valve
is opened as soon as current flows in the control circuit.
How does a normally open valve behave?
If no current flows in the control circuit, the valve is opened.
The valve is closed as soon as current flows in the control circuit.
Control telegram is received as
The heating actuator can either be controlled via the 1 bit communication
object Switch or the 1 byte communication object Control value (PWM).
Options:
1 bit (PWM or 2-step)
1 byte (continuous)
1 bit (PWM or on-off control): The room thermostat controls the heating
actuator via standard switching telegrams. An on-off control of the
control value is implemented in this way. The 1 bit value can originate
from pulse width modulation (PWM), which a room thermostat has
calculated. During a malfunction when the control signal is not received
by the room thermostat, the Switch Actuator will undertake an
autonomous PWM calculation. For this purpose, the SA/S uses the
programmable PWM cycle time.
1 byte (continuous): A value of 0…255 (corresponds to 0 %…100 %) is
preset by the room thermostat. This process is also known as
“continuous-action control”. At 0 %, the valve is closed, and at 100 % it
is fully opened. The Heating actuator controls intermediate values via
pulse width modulation.
For further information see:
, page 156 and