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163
High-speed Counters
Section 5-1
Restrictions
• There are no negative values in ring mode.
• If the max. ring count is set to 0 in the PLC Setup, the counter will operate
with a max. ring count of FFFFFFFF hex.
Reset Methods
Phase-Z Software
Reset
The high-speed counter's PV is reset when the phase-Z signal (reset input)
goes from OFF to ON while the corresponding High-speed Counter Reset Bit
is ON.
The CPU Unit recognizes the ON status of the High-speed Counter Reset Bit
only at the beginning of the PLC cycle during the overseeing processes. Con-
sequently, when the Reset Bit is turned ON in the ladder program, the phase-
Z signal does not become effective until the next PLC cycle.
Software Reset
The high-speed counter's PV is reset when the corresponding High-speed
Counter Reset Bit goes from OFF to ON.
The CPU Unit recognizes the OFF-to-ON transition of the High-speed
Counter Reset Bit only at the beginning of the PLC cycle during the oversee-
ing processes. Reset processing is performed at the same time. The OFF-to-
ON transition will not be recognized if the Reset Bit goes OFF again within the
same cycle.
Note
The comparison operation can be set to stop or continue when a high-speed
counter is reset. This enables applications where the comparison operation
can be restarted from a counter PV of 0 when the counter is reset.
One cycle
Phase-Z
Reset Bit
PV not
reset
PV not
reset
PV
reset
PV
reset
PV
reset
PV
reset
One cycle
Reset Bit
PV not
reset
PV
reset
PV not
reset
PV not
reset
Содержание CP1L-L14D Series
Страница 2: ...CP1L L14D CP1L L20D CP1L M30D CP1L M40D CP1L CPU Unit Operation Manual Revised June 2007...
Страница 3: ...iv...
Страница 9: ...x...
Страница 13: ...xiv TABLE OF CONTENTS...
Страница 21: ...xxii...
Страница 33: ...xxxiv Conformance to EC Directives 6...
Страница 65: ...32 Function Blocks Section 1 5...
Страница 153: ...120 CP CPM1A series Expansion I O Unit Wiring Section 3 6...
Страница 523: ...490 Troubleshooting Unit Errors Section 9 4...
Страница 531: ...498 Replacing User serviceable Parts Section 10 2...
Страница 563: ...530 Auxiliary Area Allocations by Function Appendix C...
Страница 611: ...578 Auxiliary Area Allocations by Address Appendix D...
Страница 638: ...605 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 639: ...606 Connections to Serial Communications Option Boards Appendix F...
Страница 669: ...636 Index...
Страница 671: ...638 Revision History...