Chapter 5 Relay Ladder Logic Programming 88
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Counter Mode 6 (Overtaking, Up-Down Count, Retentive)
Mo
de 6 Counter’s operation is similar to Mode 4, its current count value is overtaking and retentive. Its status bit will
be ON when the counter current value is not less than its preset value and will be OFF when the current value is less than
its preset value. Additionally, the Mode 6 counter is always reset to zero, regardless of the state of its direction bit. The
current count value is retentive and will keep its current count after power lost. And Counter will keep current value if “C
Keep” is active. In the example below, the counter will continue counting after its preset value of 20. Counter status bit
C01 will be ON when the current value is not less than 20.
Th
is mode is similar to mode 5, but:
※ The current value is kept when power lost in Run mode.
※ The current value is kept when change the mode between RUN and STOP if “C Keep” is active.
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