119
2121331-04-04/19 (Translation of the original operating instructions)
Operating Instructions
Modular Safety Control System MSC
EN
Enable Direction: Select this parameter to activate the DIR output
on the function block. This output is "1" (TRUE) if the axis is rotating
counter clockwise and "0" (FALSE) if the axis is rotating clockwise
(see adjacent figure).
Direction decision: Defines the direction of rotation for which the limits
entered are activated. The following can be selected:
Ì
Bidirectional
Ì
Clockwise
Ì
Counterclockwise
If "Bidirectional" is selected, the measurement is made on exceeding
the limit entered, both clockwise and counter clockwise. If "Clockwise"
or "Counterclockwise" is selected, the measurement is only made if
the axis is rotating in the selected direction.
Figure 126: Example for the rotation of the axis
clockwise
Thresholds number: Number of max. speed limits. By changing this
value the number of limits is increased or reduced from at least 1 to
a maximum of 4. If the number is greater than 1, the input pins for
the selection of the specific limit appear in the bottom part of the
function block.
In1
Limits
0
Speed 1
1
Speed 2
Table 65: 2 limits set
In2
In1
Limits
0
0
Speed 1
0
1
Speed 2
1
0
Speed 3
1
1
Speed 4
Table 66: 4 limits set
Pitch: If the axis type "Linear" and the sensor type "Rotational" are
selected, this field enables you to enter the pitch for converting the
rotation of the sensor into the distance covered.
Figure 127: Pitch
Proximity choice: Enables you to select between PNP, NPN, NO con-
tact, NC contact, 3-wire or 4-wire for the proximity sensor.
(To ensure Performance Level = Pl e, PNP NO must be used (see
7.1.3. Proximity switch input on speed monitoring modules SPM on
page 29).
Encoder Resolution: Entry for the number of pulses/revolution (for a
rotary sensor) or μm/pulse (for a linear sensor) in relation to the 1st
measuring device.
Figure 128: Proximity choice
Verification: In this field you can enter the number of pulses/revolution (for a rotary sensor) or µm/pulse (for a linear sensor)
in relation to the 2nd measuring device.
Gear Ratio: This parameter is active if there are two sensors on the selected axis. This parameter enables you to enter the
gear ratio between the two sensors. If the two sensors are on the same moving object, the ratio is 1, otherwise the figure
for the ratio must be entered. Example: There is an encoder and a proximity switch and the latter is on the moving object
that (due to a gear ratio) moves at twice the speed of the encoder. For this reason, this value must be set to 2.
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