Chapter 5 Relay Ladder Logic Programming
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Counter Mode 1 (Non-Overtake, Non-Retentive)
Mode 1 Counter will count up to a fixed preset value and stop counting when the current count is equal to the preset
value, or count down to 0 and stop counting w
hen the current count is equal to 0. Additionally, the current count value is
non-retentive and will reset to zero or preset value when restart the SG2 unit or change the Run/Stop mode, reset to zero or
preset value depends on the counting direction. In the
example below, the counter will stop counting when it reaches the preset
value of 20. Counter status bit C01 will be ON when the current value is 20.
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Under this mode, the counter current value will be init value when the smart is power up or switching between
RUN and STOP. The initial value equals to zero if the counter is in counting-up mode, but the preset value in
counting-down mode.
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