The Window Speed Control function block monitors the
speed of a device, causing a transition from 0 (FALSE) to 1
(TRUE) of the WINDOWS output when the speed is within a
prefixed range.
Parameters
Axis type: It defines the type of axis controlled by the
device. It will be Linear in the case of a translation and will
be rotational in the case of motion around an axis.
Sensor Type: When the previous parameter is Linear, the
Sensor Type defines the type of sensor connected to the
module inputs. It can be rotational (e.g. shaft encoder) or
Linear (e.g. optical array). These choices allows to set other
parameters explained later.
Measuring device: It defines the type of sensor(s) used.
The possible choices are:
- Encoder
- Proximity
- Encoder+Proximity
- Proximity1+ Proximity2
- Encoder1+ Encoder2
Sin/Cos: Disable Analog check: only when a Sin/Cos
Expansion Module is used, it is possible to disable the
analog verification sin
2
θ + cos
2
θ, carrying out a simplified
plausibility check of the Encoder signals.
Please note that when the analog check is disabled the
diagnostic coverage decreases.
Enable direction: (Available only when at least one
Encoder input is present): when checked the DIR output is
enabled on the function block. This output will be 1 (TRUE)
when the axis rotates Counterclockwise and will be 0
(FALSE) when the axis rotates Clockwise
Pitch: If the Axis Type chosen was linear and rotational,
this field allows you to enter the sensor pitch to obtain a
conversion between sensor revolutions and distance
travelled.
Proximity choice: It allows you to choose the type of
proximity sensor from PNP, NPN, Normally Open (NA) and
Normally Closed (NC), with 3 or 4 wires.
(In order to ensure a Performance Level = PLe use a
proximity switch type PNP NO: ref. “Interleaved proximity
-> page 36).
Measurement: Enter in this field the number of
pulses/revolution (in the case of rotational sensor) or
µm/pulse (linear sensor) relating to the sensor used.
Verification: Enter in this field the number of
pulses/revolution (in the case of rotational sensor) or
µm/pulse (linear sensor) relating to the second sensor
used.