2
02
1-
10
12
Functional Safety HiD282*, HiD284*
Planning
3.3
Safety Function and Safe State
Safe State
In the safe state of the safety function the output is de-energized.
Safety Function
The safety function of the device is defined: the output switches to the safe state
when the input signal is within the expected range. A safety function can be implemented
in the normal mode of operation or in the inverse mode of operation.
The line fault detection must be enabled.
LB/SC Diagnosis
If the line fault detection is active (mandatory, see datasheet), the input loops of all device
versions are supervised. The related safety function is defined as the outputs are de-energized
(safe state), if there is a line fault detected.
Reaction Time
The fault reaction time is < 20 ms.
Input channel
Switch
Position Function
1
S1
ON
Mode of operation
inverse
S1
OFF
normal
S2
ON
Line fault detection
enabled
2
S3
ON
Mode of operation
inverse
S3
OFF
normal
S4
ON
Line fault detection
enabled
3
S5
ON
Mode of operation
inverse
S5
OFF
normal
S6
ON
Line fault detection
enabled
4
S7
ON
Mode of operation
inverse
S7
OFF
normal
S8
ON
Line fault detection
enabled
Table 3.1 Switch settings
Note
The fault indication output is not safety relevant.
Note
See corresponding datasheets for further information.
