As shown in figure "B" of the illustration, what causes the Boolean output at "Q" to be set to 1? See illustration EL-0258.
When the counted pulses at CD decrement from the preset value at PV to zero.
When the counted pulses at CD increment from zero to the preset value at PV.
When the counted pulses at LD decrement from the preset value at PV to zero.
When the counted pulses at LD increment from zero to the preset value at PV.
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