Function Safety - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Planning and application
At first, the communication object Switch is evaluated with the communication object Logical connection 1.
The result is then linked with the communication object Logical connection 2.
The following functions Connection/Logic are possible:
Logical
function
AND
OR
XOR
GATE
The function Connection/Logic is always re-calculated when a communication object value is received. .
Example GATE
The GATE logic is programmed, so that a disable is implemented as soon as the communication object
Logical connection x receives a 0.
The output of the logical connection is 0.
The communication Logical connection 1 receives a 0, i.e. the GATE blocks.
The communication object Switch receives 0, 1, 0, 1. The output of the logical connection remains 0.
The communication Logical connection x receives a 1, i.e. the GATE is enabled if it is set in the
parameters.
The output of the logical connection is recalculated.
4.1.8

Function Safety

The function Safety is explained in detail under parameter window
window
Values of the communication objects
Switch Connection 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 disabled
0 enabled
1 disabled
1 enabled
A: Safety, page 70.
Result Connection 2
0 0
0 1
0 0
1 1
0 0
1 1
1 0
1 1
0 0
1 1
0
1
0 1
- disabled
0 enabled
- disabled
1 enabled
A:
Explanations
Output
0 The result is 1 if both input
values are 1. The output is 1 if
0
both input values are 1.
0
1
0 The result is 1 if one of both
input values is 1.
1
1
1
0 The result is 1 when both input
values have a different value.
0
1
1
The communication object
(CO) Switch is only allowed
0
through if the GATE (connec-
tion) is open. Otherwise, the
receipt of the CO Switch is
1
ignored.
Function, page 55 and parameter
SE/S 3.16.1 | 2CDC 505 084 D0203 133