The Speed Control function block monitors the speed of a
device generating an output 0 (FALSE) when the measured
speed exceeds a predetermined threshold.
When the speed is below the predetermined threshold the
output will be 1 (TRUE).
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: When a Sin/Cos 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.
 When analogue control is disabled, the diagnostic
coverage decreases.
 In addition, the safety level of the project drops from:
SIL 3->SIL 2 / PL e->PL d. Please refer to chapter
"Important safety instructions".
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.
Direction decision: It defines the direction of rotation for
which the set thresholds are made active. The possible
choices are:
- Bidirectional
- Clockwise
- Counterclockwise
If Bidirectional is selected, the excess of the set threshold
is detected whether the axis rotates clockwise or
counterclockwise.
Selecting Clockwise or Counterclockwise, this is detected
only when the axis rotates in the selected direction.
Threshold number: It allows you to enter the number of
thresholds for the maximum value of speed. Changing this
value will increase/decrease the number of thresholds that
can be entered from:
1 to 8 with MOSAIC M1 fw >= 4.0, MOSAIC M1S fw >=5.1 and
MVx fw >= 2.0, with MOSAIC M1S COM and MVx fw >= 2.0