Balluff BFD 3SAP-19N000-U01-LA2-C Serie Konfigurationsanleitung Seite 120

BFD 3SAP-19N000-U01-LA2-C_ _ _ _ _
Ultrasonic sensors
5
Primary Device Functions (continued)
Overview of LSSC – Profile
– Multiple switching channels are possible (up to
4 channels currently supported).
– Two switching points (setpoints) per switching channel.
– Adjustable hysteresis.
– Multiple switching modes are possible: Single-Point
Mode, Two-Point Mode and Window Mode.
– The following teach commands are available for both
setpoint 1 and setpoint 2: Single Value Teach, Two
Value Teach and Dynamic Teach (profile spec. and
Balluff spec.).
Switchpoint Logic
With switching logic High Active, the switching output
switches to high if the current measurement value is
greater than the set (taught) setpoint. With Low Active this
logic is inverted.
High Active
Low
Fig. 5-1: Switchpoint logic High Active
Low Active
High
Fig. 5-2: Switchpoint logic Low Active
Switchpoint Mode
The hysteresis can be set and adjusted in the
LSSC profile. The interpretation of the hysteresis
can be implemented in both profiles specific to the
product. For example, as a percentage in contrast
to generic implementation as fixed value.]
Single Point Mode
In Single Point Mode, only one switching point (setpoint) is
defined.
Switching behavior:
– Measurement value ≥ switching point: output active
– Measurement value ≤ switching point minus a defined
hysteresis: output inactive
28 english
High
SP1 Measured value
Low
SP1
Measured value
Low
SP1-Hys SP1
Fig. 5-3: Single-Point Mode
Two-Point Mode
In Two-Point Mode, two switching points (setpoints) are
defined.
Switching behavior:
– Measurement value ≥ switching point 1: output active
– Measurement value ≤ switching point 2: output inactive
Low
SP2 SP1
Fig. 5-4: Two-Point Mode
Window Mode
In Window Mode, two switching points (setpoints) are
defined.
Switching behavior:
– If the output is inactive and the measurement value is
greater than or equal to switching point 2 + 50% of the
set hysteresis or the measurement value is less than or
equal to switching point 1 – 50% of the set hysteresis,
the output switches to active.
– If the output is active and the measurement value is
less than or equal to switching point 2 – 50% of the set
hysteresis or the measurement value is greater than or
equal to switching point 1 + 50% of the set hysteresis,
the output switches to inactive.
Hyst.
Low
SP2
Fig. 5-5: Window Mode
Teach Process
For a successful teach-in as well to directly set a setpoint,
the following conditions must be met:
– The setpoint that is to be taught must be in the validity
range of the measurement value signal.
Additionally in Two-Point and Window Mode:
High
Measured value
High
Measured value
Hyst.
High
SP1
Measured
value