Eaton easyE4 series, Руководство пользователя

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6. Function blocks
6.1 Manufacturer function blocks
– The contacts C..ZE (actual value equal to zero) and C..FB (lower threshold value undershot) are act-
ive.
– The counter receives pulses and increases the actual value.
– C..ZE drops out as well as C..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 C..OF becomes active.
• Range C:
The coil C..SE is briefly actuated and the actual value is set to the start value.
The contacts go to the respective position.
• Range D:
– The counting direction coil C..D_ is actuated. If counting pulses are present, downward counting is
initiated.
If the lower threshold value is undershot, the contact C..FB becomes active.
• Range E:
– The reset coil C..RE is activated. The actual value will be set to zero.
– The contact C..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 number
of retentive counter relays in
Project view/System settings tab , please refer to 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 "CF - Frequency counter", page 224
→ Section "CH - High-speed counter", page 230
→ Section "CI - Incremental counter", page 237
→ Section "Timing and counter relay example", page 454
easyE4 11/18 MN050009 EN www.eaton.com
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