SmartPLC SafeLine AC4S with fieldbus interfaces
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SF_IN_local_forced
43088
Interface type:
Local I/O interface (input)
Library:
sf_logicalinterfaces.library
Symbol in CODESYS:
>
Description
43314
Logical device for safe sensors with 2 positively-driven contacts/channels
SF_IN_local_forced detects the two signals of a safe sensor at the local I/O interface (IN_Channel_A,
IN_Channel_B). The logical device forms the logical AND connector from the two values and provides
the result as safe control signal. The following additional conditions apply for the logical signal
evaluation:
Simultaneity of the signal change of the two contacts/channels is monitored during switch-on and
switch-off. If both signal channels do not take the same switching status during the fixed time, the
logical device changes to the locked error state. (InvalidTime = const. = 100 ms)
The programmer can activate the following functions as option:
EnableIN_Test:
A test signal for cross-fault monitoring generated at a local output channel at the local I/O interface
is evaluated.
StartupTest:
Both signal channels must take the state FALSE simultaneously before the logical device can start
with the signal evaluation.
DisableLogging:
Only error events are transmitted to the online support centre (OSC) of the AC4S user interface.
If cross-fault detection is activated for 2-channel safe devices at the local I/O interface
(EnableIN_Test = TRUE), the following applies:
Signal change at the inputs (IN_Channel_A, IN_Channel_B) must be applied longer than the
cycle time of the test pulses (3 PLC cycles). Otherwise the logical device changes to the
locked error state.
To reset the logical device from the locked error state and to read diagnostic information of the
logical device:
→
CtrlLocalInputs
(
