Chapter 5. Power Supply / CPU
5-10
• If the counting value (CV) increments and reaches the setting value (PV), the output contact (Q) turns on. When
the reset signal is turn on, the counting value is set to 0’ and the output contact (Q) turns off.
(2) Decrement Counter
• It should have input condition (CD), load (LD) and setting value (PV).
• If the counting value (CV) decrements and reaches 0’, the output contact (Q) turns on. If the load (LD) signal is
turned on, the counting value is set to the setting value and the output contact (Q) turns off.
(3) Increment / Decrement Counter
• It should have Increment input condition (CU); Decrement input condition (CD), load (LD) and setting value (PV).
• If reset signal (R) turns on, counting value (CV) is set to 0.
• If load signal (LD) turns on; counting value is set to setting value (PV).
• It is increased by 1 at the rising edge of increment input (CU) and decreased by 1 at the edge of decrement input
(CD). If counting value (CV) is equal or larger than setting value (PV), QU will be on, and if counting value (CV) is
equal or less than setting value (PV), QD will be on.
Current value
Counter output
Preset value
Load input
Down count pulse input
Current value
Down counter output
Load input
Up counter output
Reset input
Down count pulse input
Up count pulse input
Preset value
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