High-Speed Counter - Eaton easyE4 Manual

6. Function blocks
6.1 Manufacturer function blocks
6.1.2.3 CH - High-speed counter
316
CH function blocks can be used to quickly count rising edges forward and backward.
You can set a lower and higher limit as comparison values for the high-speed
counter function block, as well as a start value.
There are four high-speed counters available.
Square wave count pulses are required to ensure a 1:1 mark-to-space
ratio.
The maximum count frequency is 5000 Hz.
Note that the digital inputs I1 to I4 are permanently assigned to the fre-
quency counter function blocks provided:
I1: Counter input for counter CH01.
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I2: Counter input for counter CH02.
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I3: Counter input for counter CH03.
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I4: Counter input for counter CH04.
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General
easyE4 base devices provide 4 high-speed counters
CH01...CH 04.
The high-speed up and down counters are internally hard-
wired with the digital inputs I01...I04 and operate inde-
pendently of the cycle time.
Operating principle
The contacts will switch according to the actual value. The appropriate function
block outputs switch according to the actual value determined. The counter relays
enable a preset start value to be defined at the SV input.
Only square wave signals are permissible.
The mark-to-space ratio is 1:1.
The counter wiring must observe the following digital input assignment:
I01 Counter input for the CH01 counter relay
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I02 counter input for CH02 counter relay
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I03 counter input for CH03 counter relay
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I04 counter input for CH04 counter relay
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easyE4 02/24 MN050009EN Eaton.com