Eaton easy800

5 Function blocks
5.6 C, counter relay
Control Relay easy800 11/11 MN04902001Z-EN www.eaton.com 165
Legend for Figure 112:
1: Counter coil C..C_
2: Upper setpoint value >SH
3: Start value >SV.
4: Lower setpoint value >SL.
5: Counting direction, coil C..D_
6: Transfer start value, coil C..SE.
7: Reset coil C..RE
8: Contact (N/O) C..OF: Upper limit setpoint reached, exceeded
9: Contact (N/O) C..FB lower limit setpoint reached, undershot
10: Actual value equal to zero.
11: Out of value range
• Range A:
– The counter range has the value zero.
– The contacts C..ZE (actual value equal to zero) and C..FB (lower setpoint value undershot) are active.
– The counter receives pulses and increases the actual value.
– C..ZE drops out as well as C..FB after the lower setpoint value is reached.
• Range B:
– The counter relay counts upwards and reaches the upper setpoint 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 setpoint value is undershot, the contact C..FB becomes active.
• Range E:
– The reset coil C..RE is activated. The actual value is 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).
Memory
52 + per 4 Byte/Constant at function block input
Cycle time [μs]
easy800 standard easy800-SWD
46 12