Technology Modules
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Possible measurement ranges
Revolutions measurement
Definition
In this operating mode, the counter module counts the pulses received from a rotary sensor within
a predefined integration time. The number of ”sensor pulses per revolution” must be defined
beforehand by parameters in the system. The number of ”sensor pulses per revolution” and the
pulses counted determine the speed of the connected motor.
The integration time is defined by measuring parameters. It can be set in 10 ms increments to
between 10 ms and 10 s.
The speed is indicated in units of 1 × 10
-3
rpm.
Limit value monitoring
The limit values can be configured and defined at a later time via the control interface/process out-
put. The following limit value ranges are possible:
Range defined by parameters
The value range is restricted by the 3 byte parameter length
Lower limit n
u
is 0…16 777 214 × 10
-3
Hz
Upper limit n
u
is 1…16 777 215 × 10
-3
Hz
The upper limit must be greater than the lower limit. The diagnostics messages ”upper limit wrong”
and ”lower limit wrong” indicate parameter definitions that are outside of the permissible value
range. The diagnostics messages are cleared when valid parameters are entered.
Integration time f
min
f
max
10 s 0.1 Hz 200000 Hz
1 s 1 Hz 200000 Hz
0.1 s 10 Hz 200000 Hz
0.01 s 100 Hz 200000 Hz
Fig. 264: Revolutions measurement with release function
Count
signals
Integration time
Start of rotational
speed measurement
End of rotational
speed measurement
n*10 ms n*10 ms
Internal
release
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