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6. Function blocks
6.1 Manufacturer function blocks
6.1.2.2 CF - Frequency counter
easyE4 base devices provide 4 frequency counters
CF01…CF04. These high-speed frequency counters are intern-
ally connected with the digital inputs I01…I04 and operate inde-
pendently of the cycle time. The contacts will switch according
to the actual value.
Operating principle
For the entire configured measuring interval, the pulses at the input are counted inde-
pendently of the cycle time and are then used to determine the frequency. The number
of pulses counted within the measuring interval is then provided as a value at function
block output QV. Finally, as a result, output QF delivers a value equal to ten times the fre-
quency so that the measurement can be accurate to the decimal place despite the fact
that the value range is of type integer.
This means that the frequency is the value at QF multiplied by 0.1.
F= QF*0,1
The CF01…CF04 frequency counters are not dependent on the cycle time.
The minimum counter frequency is 4 Hz.
The maximum counter frequency is 5 kHz.
Only square wave signals are permissible.
The mark-to-space ratio is 1:1.
The counter wiring must observe the following digital input assignment:
l
I01 counter input for frequency counter CF01
l
I02 counter input for counter CF02
l
I03 counter input for counter CF03
l
I04 counter input for counter CF04
NOTICE
Avoid unforeseeable switching states.
Switch C, CF, CH, CI function blocks only at one single point in the pro-
gram.
Otherwise, previous counts will be overwritten.
224
easyE4
11/18 MN050009 EN www.eaton.com
Содержание easyE4 series
Страница 1: ...Manual 11 18 MN050009 EN easyE4 Manual...
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Страница 22: ...0 1 About this manual 18 easyE4 11 18 MN050009 EN www eaton com...
Страница 40: ...1 easyE4 control relays description 1 10 Safety regulations 36 easyE4 11 18 MN050009 EN www eaton com...
Страница 169: ...easyE4 11 18 MN050009 EN www eaton com 165...
Страница 462: ...6 Function blocks 6 4 Timing and counter relay example 458 easyE4 11 18 MN050009 EN www eaton com...
Страница 490: ...7 System settings 7 16 Time and Date setting 486 easyE4 11 18 MN050009 EN www eaton com...
Страница 520: ...9 easyE4 inside 9 7 NET network 516 easyE4 11 18 MN050009 EN www eaton com...
Страница 524: ...10 Diagnostics messages of the operating system 10 2 Diagnostics buffer 520 easyE4 11 18 MN050009 EN www eaton com...
Страница 570: ...11 Connection to other devices 11 6 E mail function 566 easyE4 11 18 MN050009 EN www eaton com...
Страница 578: ...12 Faults 12 4 Functionality of the NET faulty 574 easyE4 11 18 MN050009 EN www eaton com...
Страница 582: ...13 Maintenance 13 3 Storage transport and disposal 578 easyE4 11 18 MN050009 EN www eaton com...
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