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159
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
Содержание CP1L - 12-2007
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Страница 13: ...xiv TABLE OF CONTENTS...
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Страница 33: ...xxxiv Conformance to EC Directives 6...
Страница 65: ...32 Function Blocks Section 1 5...
Страница 428: ...395 Clock Section 6 9...
Страница 429: ...396 Clock Section 6 9...
Страница 523: ...488 Troubleshooting Unit Errors Section 9 4...
Страница 531: ...496 Replacing User serviceable Parts Section 10 2...
Страница 563: ...528 Auxiliary Area Allocations by Function Appendix C...
Страница 611: ...576 Auxiliary Area Allocations by Address Appendix D...
Страница 638: ...603 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 639: ...604 Connections to Serial Communications Option Boards Appendix F...
Страница 669: ...634 Index...
Страница 671: ...636 Revision History...