IFM Electronic ecomat 200 FS-3 Notice D'utilisation page 33

9. Setting examples
Skew monitoring on a spindle lifting system
(see drawing, page 22)
System
Rotational speed of the spindle
Assignment spindle 1
Assignment spindle 2
Stroke per spindle rotation
switching cams per spindle
Task
In case of a skew (difference in height) of 200 mm the monitor outputs are to switch.
When the difference in height is evened out by controlling the drives accordingly the monitor
outputs are to switch off automatically.
Monitor parameters
FO 1/2 switching function
NC1/2 number of switching cams
SP 1/2 number of differential pulses
HY1/2 number of hysteresis pulses
SOP latching function
General remarks
In this case the number of differential pulses is a measure of the skew of the lifting
system. The rotational speed of the spindles is not important for the monitoring. It
only indicates the shortest time in which the skew is reached.
Switching operation
If e.g. spindle 1 runs slower than spindle 2, there will be a difference in height.
Output 2 switches when a difference of 200 mm (this corresponds to 4 differential
pulses) is reached. According to the switching function the relay de-energises.
Spindle 2 can run slower if the drive is controlled accordingly.
The difference in height is reduced and thus the number of differential pulses.
Output 2 switches back when ±1 differential pulse is reached.
According to the switching function the relay energises again.
The inactive latching function enables output 2 to switch back automatically.
example values
60 RPM
input 1
input 2
100 mm
2 per revolution
4 (default value!)
2 (this corresponds to a linear difference in height of
50 mm per pulse)
4 (this corresponds to 4 x 50 mm = 200 mm difference
in height)
3 (this corresponds to switch-off point according to
SPx - HYx = 4 - 3 = 1)
0 (inactive)
FS-3 / FS-3N
MONITOR
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