SmartPLC SafeLine AC4S with fieldbus interfaces
240
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SF_IN_local_independent
43093
Interface type:
Local I/O interface (input)
Library:
sf_io.library
Symbol in CODESYS:
>
Description
43307
Logical device for a safe sensor with 2 contacts/channels acting independently of each other
SF_IN_local_independent detects switching states of 2 input channels of 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:
The simultaneity of the signal change is not monitored.
If the signal state of the two channels is invalid longer than the firmly set time, both signal
channels have to take the state FALSE simultaneously before switch-on is possible again.
(InvalidTime = const. = 140ms)
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 read the diagnostic information of the logical device:
→
CtrlLocalInputs
(
