Setting Example; Detection Of Conveyor Belt Speed - IFM Electronic ecomot200 DW2003 Notice D'utilisation

9. Setting example

Detection of conveyor belt speed and fault monitoring
(see drawing, page 23)
System
Conveyor belt speed
Switching cam shaft
Analogue data recorder
Task
The conveyor belt speed is to be detected between the min and max range and is to be
converted into an analogue standard signal (4...20 mA).
A conveyor belt speed < 50 m/h is to be signalled as fault state.
The output relay of the monitor is to remain in this switching state until a reset is started.
Monitor parameters
FO1 Output
NOC Number of switching cams
FO2 Switching function
Output 2
SO2 Memory function
FH1 Frequency High
(maximum value
of the frequency range)
FL1 Frequency Low
(minimum value
of the frequency range)
SP2 Switch point
Output 2
Analogue output
FO1 = 1 (4...20 mA)
proportional
I [mA]
20
15
10
FL1
4
0
100
(= 270 RPM)
1 (4)
2
2
2
540
270
135
FH1
150 200 V [m/h]
(= 540 RPM)
Example values
min.100 m/h
max. 200 m/h
2 per revolution
4...20 mA
4...20 mA (20...4 mA)
shaft speed in RPM
output relay deenergised when the current value
falls below switch point SP2
(= signalled fault "too low speed"/"blocked").
reset by button or external 24 V DC signal
detection of the input frequency by teach function
with a max. conveyor belt speed of 200 m/h
(here e.g. shaft speed 540 RPM)
detection of the input frequency by teach function
with a min. conveyor belt speed of 100 m/h
(here e.g. shaft speed 270 RPM)
detection of the input frequency by teach function
with a conveyor belt speed of 50 m/h
(here e.g. shaft speed 135 RPM)
or
or numerical entry by conversion on the basis
of the input values FH1 or FL1 detected before.
FO1 = 4 (20...4 mA)
antiproportional
I [mA]
FL1
20
15
10
4
0
100
(= 270 RPM)
MONITOR
FH1
150 200 V [m/h]
(= 540 RPM)
page 35
FA-1