ABB i-bus
®
KNX
Parameters
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 232
7.7.1
Use forced operation
Options:
No
Forced operation 1 bit; 1 active
Forced operation 1 bit; 0 active
Forced operation 2 bit
The usage of forced operation can be activated using this parameter. In addition, the selection of
the parameter defines which type of forced operation is used.
The forced operation is used to place the outputs on the device in a pre-defined state by switching
a 1- or 2-bit group object. Forced operation overrides the normal control of the device (controller,
value specifications via group objects). For the device to function normally, forced operation must
be actively disabled.
•
Forced operation 1 bit; 1 active
: Forced operation is enabled. The dependent group object
Forced operation 1 bit
is activated.
Forced operation is activated on receiving a "1" via this group object. If a "0" is received, forced
operation is deactivated.
The dependent parameters
Control value
,
Fan output
,
Relay output
are enabled.
•
Forced operation 1 bit; 0 active
: Forced operation is enabled. The dependent group object
Forced operation 1 bit
is activated.
Forced operation is activated on receiving a "0" via this group object. If a "1" is received, forced
operation is deactivated.
The dependent parameters
Control value
,
Fan output
,
Relay output
are enabled.
•
Forced operation 2 bit
: Forced operation is enabled. The dependent group object
Forced
operation 2 bit
is activated.
The dependent parameters
Control value for forced operation ON
,
Fan output for forced
operation ON
,
Relay output for forced operation ON
,
Control value for forced operation OFF
,
Fan output for forced operation OFF
and
Relay output for forced operation OFF
are enabled.
Note
With forced operation 2 bit there can be two forced operation states (forced operation On and
forced operation Off). These states are activated using the 2-bit group object. The first bit defines
whether the forced operation is active (bit 1 (high) = 1) or inactive (bit 1 (high) = 0), the second bit
decides on the Off (bit 2 (low) = 0) or On (bit 2 (low) = 1) state.
Value
Bit 1
Bit 0
Status
0
0
0
Inactive
1
0
1
Inactive
2
1
0
Forced OFF
3
1
1
Forced ON
Table 31: Forced operation states
For information on the priority of the forced operation in comparison to the other properties of the
device, see .
Note
The state of the forced operation is saved on bus voltage failure and retrieved again on bus volt-
age recovery. If forced operation was active on bus voltage failure, it is also active after bus volt-
age recovery.
Note
Forced operation is deactivated on an ETS reset.