Emerson Machinery Health AMS 6300 SIS Operating Manual page 146

Overspeed protection system
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Functions and applications
February 2023
Simulation of speed and rotational direction
The function of the AMS 6300 SIS can also be checked by the simulation of the sensor
signals. For this, you need a function generator, suitable to generate signal levels
according to the requirements of the sensor input. Ideally, this signal with DC portion and
amplitude should correspond exactly to the real sensor signal to avoid changes in the
parameter setting regarding sensor input (trigger thresholds, gap limits). If the rotational
direction is to be tested, use a three-channel function generator with a phase shift of 120°
between the channels. Depending on the configured sensor type see
7-10, or
the protection system. Change the signal frequency to change the speed. The frequency
to be adjusted at the function generator depends on the number of teeth of the trigger
wheel. Use the following formula to calculate the required signal frequency [Hz] for a
desired speed [rpm] depending on a certain number of teeth [n].
Frequency = (Speed * n) / 60s
Example with speed = 3000 rpm and a trigger wheel with 32 teeth:
Frequency
To simulate a speed of 3000 rpm, generate a signal with a frequency of 1600 Hz.
146
Figure 7-11
for an example how to connect a function generator to a monitor of
= (3000 rpm * 32) / 60s = 1600 Hz
Generator
Operating Manual
MHM-97442
Figure
7-9,
Figure
MHM-97442, Rev. 2.06

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