Phoenix Contact PSRmodular - Figure 5-57: Overlapping Proximity Switches; Figure 5-58: Slider for Setting the Hysteresis Parameter

Items and operators of the PSRmodular Software
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Gear Ratio Use this parameter if there are two sensors on the selected axis. This parameter enables
you to enter the ratio between the two sensors. If both sensors are located on the same mov-
ing shaft, the ratio is 1; otherwise the ratio must be entered.
Example: an encoder and a proximity switch are positioned on different shafts of a gearbox.
The shaft at the encoder turns twice as fast as the shaft at the proximity switch. Therefore,
the value that needs to be entered is 2.
Overlapping proximity
switches
This option is available if a single axis is monitored by two proximity switches
(proximity switch 1 + proximity switch 2).
If the “Overlapping proximity switches” function has not been selected (default setting), an
input condition where both sensor signals are simultaneously logic “0” is detected as an
input error.
Conditions for using this option:
– The proximity switches must be attached so that at least one of the two signals is logic
“1” at any given time.
– Use PNP proximity switches.
– Use proximity switches of type NO (normally open, N/O contact).
Figure 5-57 Overlapping proximity switches
Hysteresis This value corresponds to the hysteresis as a percentage. Due to possible drive synchroni-
zation fluctuations, a restart hysteresis below the parameterized speed value is observed.
A hysteresis value between 1% ... 50% can be selected. The parameterized speed value
corresponds to the upper limit of the hysteresis.
Figure 5-58 Slider for setting the hysteresis parameter
Speed 1 ... 8 The maximum value for the respective speed threshold should be entered in this field. If the
actual measured speed is higher than the parameterized speed, the “Over” output at the
function block is logic “0”. If the measured speed is lower than the parameterized speed, the
“Over” output is logic “1”.
Frequency 1 ... 8 These fields display the calculated frequencies for the previously determined (switch-off)
threshold values (“fM”). The “fm” parameter, on the other hand, displays the restart value
(hysteresis). The set hysteresis applies for all threshold values.
If the displayed threshold value is green, the result of the frequency calculation is positive.
If the displayed threshold value is red, the parameters need to be modified.
The hysteresis only needs to be modified if the following applies: fM = green; fm = red