Omron CP1L CPU UNIT - 03-2009, Operation Manual

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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
2 2 1 1 0 0 7 6 8 7 6 5 5 4 4 3 3
Increment pulse
Decrement pulse
Decrement
pulse
Increment
pulse
Count value
↑
L Decrement
H
↑
Increment
↓
H No change
L
↓
No change
L
↑
Increment
↑
H Decrement
H
↓
No change
↓
L No change
14 2 15 1 16 0 9 10 8 7 6 11 5 12 4 13 3
Pulse
Pulse Count value
↑
Increment
H No change
↓
No change
L No change