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AW00123402000
5.13 Checking the Status of the I/O Lines
5.13.1 Checking the Status of an I/O Line
You can determine the current status of any I/O line that depends on whether an electrical signal is
applied to the line and whether the line inverter is disabled or enabled. In addition, factory settings
determine fundamentally whether a given electrical signal level will be considered to correspond to
a "high" or "low" line status.
For example, consider output line Line 2:
When no electrical signal (output signal) is applied and when the line inverter is disabled, the
signal level will be "high" according to factory settings and the LineStatus parameter value will
be "true" (see
Table
When an electrical signal is applied and when the line inverter is disabled, the signal level will
be "low" and the LineStatus parameter value will be "false".
When no electrical signal is applied and when the line inverter is enabled, the signal level will
be "low" and the LineStatus parameter value will be "false" (see
When an electrical signal is applied and when the line inverter is enabled, the signal level will
be "high" and the LineStatus parameter value will be "true"
The line status of a GPIO line (Line3, Line 4) does not depend on the configuration
of the GPIO line for input or output.
The signal levels and corresponding LineStatus parameter values for all I/O lines are listed below,
depending on whether an electrical signal is applied (as indicated by electrical signal level) and
whether line inverters are enabled
electrical signal levels and line inverter settings result in identical line status (compare
Table 19
on one hand and
No electrical signal applied and line inverters disabled:
I/O Line
Electrical Signal /
Electrical Signal
Line 1 (input)
Line 2 (output)
Line 3 (input/output)
Line 4 (input/output)
Table 16: I/O Lines and Line Status With no Electrical Signals Applied and All Line Inverters Disabled
Basler ace USB 3.0
16).
(Table 16
through
Table 17
and
Table 18
Logical LineStatus
Parameter Value
Level
Off/Low
Off/Low
Off/Low
Off/Low
Table
Table 19).
Note that certain combinations of
on the other).
Binary Expression
of the Line Status
Parameter Value
False
0
True
1
True
1
True
1
Physical Interface
17)
Table 16
and
79
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