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IFM Electronic efector800 VSE001 Montageanleitung Seite 18

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Function
• Up to 4 sensors VSA001 continuously detect the acceleration at
non rotating machine surfaces (total sampling rate 100 kHz). The
diagnostic electronics receives these signals via a current interface
and calculates the amplitudes of the parametized damage
frequencies (e.g. inner race, outer race and rolling elements) of up
to 5 different diagnosis objects per sensor consisting of maximum
20 individual frequencies.
• The rolling element bearings or diagnosis objects to be monitored
are defined at the PC using a software (article no. VES003) and then
transferred as a parameter set to the diagnostic electronics via the
Ethernet interface (pos. 1). The diagnosis objects are evaluated and
monitored relatively to the teach value (reference value).
• Optionally, the diagnostic electronics also calculates the rms value
and maximum value of the acceleration or the vibration velocity.
Evaluation and monitoring are then carried out via absolute limit
values without a reference value, e.g. to DIN 10816.
• The diagnosis object or the level with the highest degree of dam-
age is indicated as early warning and main alarm via switching out-
puts. Optionally, the measured value / object value can also be pro-
vided as an analogue signal.
• At the same time the diagnostic electronics separately indicates the
operating status for every sensor using multi-colour LEDs.
• The diagnostic electronics uses its own object limit values for all set
spectral diagnosis objects for early warning (yellow) and main alarm
(red). The limit values of the diagnosis objects are always related to
the stored teach value and therefore describe a signal fan-out.
"Green" always corresponds to 100 %.
• The diagnosis value is weighted according to the set curve "signal
weighting" to consider differences for the trigger threshold for dif-
ferent rotational speeds in case of a speed-variable operation. Each
diagnosis object has individual weighting curves.
18

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