High-Speed Counter Inputs; Pulse Input Methods Settings - Omron CP1E CPU UNIT SOFTWARE User Manual

11 High-speed Counters

11-2 High-speed Counter Inputs

11-2-1 Pulse Input Methods Settings

There are four pulse input methods for high-speed counters.
• Increment pulse input
• Differential phase input (4×)
• Up/Down pulse input
• Pulse+direction input
Increment Pulse Input
The Increment Pulse Input counts signals on a single-phase pulse input. Only incrementing the count is
possible in this mode.
Pulse
0 1
Differential Phase Input (4×)
The Differential Phase Input uses two phase signals (phase A and phase B) and increments/decre-
ments the count according to the status of Differential Phase (4×).
Phase A
Phase B
×4 0 1
Up/Down Pulse Input
The Up/Down Pulse Input uses two signals, an increment pulse and a decrement pulse.
Increment
pulse
Decrement
pulse
11-8
2 3 4 5 6 7 8
2 3 4 5 6 7 8 9 10 11 12 11 10
0 1 2 3 4 5 6 7
9 10 11 12 13 14 15
9 8 7 6 5 4 3 2 1 2 3 4
8 7 6 5 4 3 2 1
CP1E CPU Unit Software User's Manual(W480)
Conditions for Incrementing
the Count
Pulse Count value
OFF ON Increment
ON No change
ON OFF No change
16
No change
OFF
· Only rising edges are counted.
Conditions for Incrementing/
Decrementing the Count
Phase A Phase B Count value
OFF ON
OFF Increment
ON OFF ON Increment
ON OFF
ON Increment
ON OFF
OFF Increment
5 6 7 8
OFF OFF ON
Decrement
OFF ON ON Decrement
Decrement
ON ON OFF
ON OFF OFF Decrement
Conditions for Incrementing/
Decrementing the Count
Decrement Increment Count value
pulse pulse
OFF ON
OFF Decrement
Increment
OFF ON
ON
ON OFF
ON No change
OFF ON OFF No change
0
Increment
OFF OFF ON
Decrement
OFF ON ON
No change
ON ON OFF
ON OFF OFF No change
· The count is incremented for each increment
pulse and decremented for each decrement
pulse.
· Only rising edges are counted.