6. Function blocks
6.1 Manufacturer function blocks
• Range A:
– The counter range has the value zero.
– The contacts CI..ZE (actual value equal to zero) and CI..FB (lower threshold value undershot) are act-
ive.
– The counter relay receives pulses at I01 and I02 or at I03 and I04 and increments the actual value.
– CI..ZE drops out as well as CI..FB after the lower threshold value is reached.
• Range B:
– The counter relay counts upwards and reaches the upper threshold value.
The “upper setpoint value reached” contact CI..OF becomes active.
• Range C:
– The coil CI..SE is briefly actuated and the actual value is set to the start value.
The contacts go to the respective position.
• Range D:
– The counter relay receives pulses at I02 or I04 and decrements the actual value. The function block
counts down.
– If the lower threshold value is undershot, the contact CI..FB becomes active.
• Range E:
– The reset coil CI..RE is activated. The actual value will be set to zero.
– The contact CI..ZE is active.
• Range F:
– The actual value goes outside the value range of the counter relay.
– The contacts OF, FB, ZE become active according to the direction of the values (positive or negative).
Retention
Counter relays can be operated with retentive actual values. You can select the num-
ber of retentive counter relays in easySoft 8Project view/System settings tab. The
retentive actual value will require 4 bytes of memory space. If a counter relay is
retentive, the actual value will be retained when the operating mode switches from
RUN to STOP and when the power supply is switched off. If the device is started in
RUN mode, the counter relay will continue to work with the non-volatile actual value.
See also
→ Section "C - Counter relay", page 304
→ Section "CF - Frequency counter", page 310
→ Section "CH - High-speed counter", page 316
→ Section "Timing and counter relay example", page 616
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easyE402/24 MN050009ENEaton.com
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