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.
 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.
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 a minimum of 1 to a maximum of 8
with M1 fw >= 4.0, M1S fw >=5.1 and MVx fw >= 2.0 and
4 with M1 fw <4.0 or or M1S< 5.1 or MVx fw < 2.0. In the
case of thresholds greater than 1, the input pins for the
selection of the specific threshold will appear in the lower
part of the function block. Let the user to choose which
threshold has to be enabled.
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