ABB i-bus
KNX
Commissioning
SA/S | 2CDC 505 056 D0208 121
The status value to be sent is defined using the parameter
Object value switching status (Object “Status
Switch”)
.
Please note
The contact position is determined by a sequence of priorities and logical connections –
see
Function diagram
, p. 161.
The contact position can only be correctly evaluated if the switching actions occur via KNX. The SA/S
cannot differentiate between manual switching and a cable break or device fault.
Object value switching status
(Object "Status Switch")
Options:
1=closed, 0=open
0=closed, 1 open
•
1=closed, 0=open:
The value 1 is written to communication object
Status Switch
for a closed contact,
0 for an open contact.
•
0=closed, 1=open
: The value 0 is written to communication object
Status Switch
for a closed contact,
1 for an open contact.
The reaction of the heating valve is dependent on the position of the Switch Actuator relay and the valve
type (normally open or normally closed).
Reaction on bus voltage failure
Options:
Contact open
Contact closed
Contact unchanged
This parameter defines how the contacts and accordingly the valve drives are controlled on bus voltage
failure.
For further information see:
Reaction on bus voltage failure, recovery and download
, p. 166
Only enough energy for a switching action is available when the bus voltage fails.
If a normally closed valve is used, a closed contact means an open valve (100 %) or a closed valve (0 %)
if the contact is open.
If a normally open valve is used, a closed contact means a closed valve (100 %) or an open valve (0 %)
if the contact is open.
A middle position cannot be set for the valve on bus voltage failure. It moves either to its closed (0%)
or open (100%) end position.
Содержание i-bus SA/S 2.6.2.1
Страница 1: ...ABB i bus KNX SA S Switch Actuators Product Manual ...
Страница 137: ......