Omron CP1L - Page 213

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High-speed Counters Section 5-1
Conditions for Incrementing/Decrementing the Count
• The count is incremented when the direction signal is ON and decre-
mented when it is OFF.
• Only up-differentiated pulses (rising edges) can be counted.
Up/Down Mode The up/down mode uses two signals, an increment pulse input and a decre-
ment pulse input.
Conditions for Incrementing/Decrementing the Count
• The count is incremented for each increment pulse input and decre-
mented for each decrement pulse input.
• Only up-differentiated pulses (rising edges) can be counted.
Increment Mode The increment mode counts single-phase pulse signal inputs. This mode only
increments the count.
Conditions for Incrementing/Decrementing the Count
Direction
signal
Pulse
signal
Count value
↑ L No change
H ↑ Increment
↓ H No change
L ↓ No change
L ↑ Decrement
↑ H No change
H ↓ No change
↓ L No change
22 1 1 0 0 7 6876 55 44 33
Increment pulse
Decrement pulse
Decrement
pulse
Increment
pulse
Count value
↑ LDecrement
H ↑ Increment
↓ H No change
L ↓ No change
L ↑ Increment
↑ HDecrement
H ↓ No change
↓ L No change
142 151 16 0 9 10876 115 124 133
Pulse
Pulse Count value
↑ Increment
H No change
↓ No change
L No change