ABB SA/S 12.16.6.1 Product Manual - Knx Commissioning
ABB i-bus
®
KNX Commissioning
102 2CDC 505 056 D0207 | SA/S
3.2.4
Communication objects
mode Switch Actuator
3.2.4.1
Communication objects
General
No.
Function
Object name
Data type
Flags
0
In Operation
System
EIS 1, 1 bit
DPT 1.002
C, T
In order to regularly monitor the presence of the Switch Actuator on the ABB i-bus
®
, a
monitoring telegram can be sent cyclically on the bus.
This communication object is always enabled.
Telegram value:
1= system operational
0 = send inactive
1
Safety Priority 1
General
EIS 1, 1 bit
DPT 1.005
C, W, U
This communication object is enabled if in parameter window General the
parameter Function Safety Priority 1 is selected with the option enabled by object value "0" or
enabled by object value "1"
.
The Switch Actuator can receive a 1 bit telegram via this communication object, which another
KNX device, e.g. diagnostics module or wind sensor, sends cyclically. On receipt of the
telegram, the communication capability of the bus or the sensor (signalling device) can be
monitored. If the Switch Actuator does not receive a telegram (value can be programmed) on
the communication object Safety Priority 1, a fault is assumed, and a response programmed in
parameter window A: Safety is implemented. The output of the Switch Actuator goes into a
safety state and does not process any telegrams. Only after the communication object Safety
Priority 1
again receives a 1 or 0 (depending on the parameterization) will incoming telegrams
be processed again and the contact setting changed.
The control period can be adjusted in the parameter General via the parameter Control period
in seconds
.
The safety priority 1 is also triggered if a telegram with the programmable trigger value is
received.
The function Safety Priority 1 has, with the exception of the behaviour at bus voltage failure
and recovery, the highest priority in the Switch Actuator, (see