4B Watchdog Super Elite, Руководство по эксплуатации

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The example CLI1 settings below are based on 4B’s Milli-Speed switch. The Milli-Speed has
a 4-20 mA output designed to detect belt slip, belt underspeed, stop motion, low speed or zero
speed.
Referring to the manual for the Milli-Speed, at calibrated speed the output will be set to 17 mA
(100%). If the speed input increases to equal 123% of the calibrated speed, the output will be 20
mA and will not rise above this. An input rate of less than 10% of the calibrated speed is treated
as zero speed (4 mA). Once the speed reaches 10% of calibrated speed, the output will change
from 0% (4 mA) to 10% (5.3 mA). The output will then continue linearly up to the maximum rate
of 123% (20 mA). In belt slip applications, the machinery must shutdown with no more than 20%
belt slip to prevent damage to the belt. On a fixed motor speed application where the Milli-Speed
is calibrated for normal running speed (100%), 80% of the calibrated speed is 14.4 mA.
EXAMPLE MENU SETTINGS
1. CLI1 Custom Label: %
% was chosen since speed is being monitored. This is can be changed
based on individual requirements.
2. CLI1: Input Range: 4 to 20
The Milli-Speed output is from 4 to 20 mA.
3. CLI1 Min Scaled Value: 0
The minimum scale for the Milli-Speed is 0% (4 mA).
4. CLI1 Max Scaled Value: 123
The maximum scale for the Milli-Speed is 123% (20 mA).
5. CLI1 Absolute Alarm Low: 80
2 0% underspeed alarm (100% running speed - 20%), will provide an alarm
and shut down equipment (if setup).
6. CLI1 Pre-Absolute Alarm Low: 90
10% underspeed alarm (100% running speed - 10%), will provide an alarm
but will not shut down equipment.
7. CLI1 Pre-Absolute Alarm High: 110
10% overspeed alarm (100% running speed + 10%), will provide an alarm
but will not shut down equipment.
8. CLI1 Absolute Alarm High: 120
20% overspeed alarm (100% running speed + 20%), will provide an alarm
and will shut down equipment (if setup)
9. CLI1 Alarm Delay: 1
The default alarm delay of 1 second is being used.
10. CLI1 Stop Delay: 1
The default stop delay of 1 seconds is being used for immediate shutdown
on severe underspeed and overspeed conditions.
Since sensor outputs can vary, it is vital to use the information provided in the sensor’s manual to
properly setup the WDC4.