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 sen-
sor into the distance covered.
Proximity choice: Selecting the proximity switch enables you to select be-
tween PNP, NPN, NO contact, NC contact, 3-wire or 4-wire.
(To ensure Performance Level=Ple, a PNP NO contact must be used (see "Proximity
switch input on speed monitoring modules SPM", page 27).
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.
Verification: Entry for 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 parame-
ter 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 in relation to the Encoder. The value 2 is therefore entered.
Hysteresis (%): Represents the hysteresis (in percent) below which the speed change is filtered
out. Enter a value other than 1 to prevent continuous switching of the input.
Speed 1, 2, 3, 4: Enter the highest value for the speed in this field. If the speed is exceeded, the
OVER output on the function block is "0" (FALSE). Conversely, if the speed measured is below the
value entered, the OVER output on the function block is "1" (TRUE).
Frequency: Defines the calculated values for the maximum frequency fM and fm (reduced by
the hysteresis entered). If the value displayed is GREEN, the calculated frequency is in the correct
range. If the value displayed is RED, the parameters given in the following formula must be
changed.
1. Rotary axis, rotary sensor. The calculated frequency is:
v][pulses/resolutionRe
60
[rev/min]rpm
[Hz]f
2. Linear axis, rotary sensor. The calculated frequency is:
v][pulses/reRe
[mm/rev]*60
1000*[m/min]
[Hz] solution
pitch
speed
f
3. Linear axis, linear sensor. The calculated frequency is:
[µm/pulse]solutionRe
1000*[mm/s]speed
[Hz]f
4. Hysteresis. Only to be changed if: fM = green; fm = red
KEY:
f = Frequency
Rpm = Rotary speed
Resolution = Resolution
Speed = Linear speed
Pitch = Pitch
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