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High-speed Counters
Section 5-2
• When a high-speed counter is being used (enabled in the PLC Setup), the
input cannot be used as a general-purpose (normal) input, interrupt input,
or quick-response input.
Starting Interrupt Tasks based on Comparison Conditions
Data registered in advance in a comparison table can be compared with the
actual counter PVs during operation. The specified interrupt tasks (registered
in the table) will be started when the corresponding comparison condition is
met.
There are two comparison methods available: Target value comparison and
range comparison.
• Use the CTBL(882) instruction to register the comparison table.
• Use either the CTBL(882) instruction or INI(880) instruction to start the
comparison operation.
• Use the INI(880) instruction to stop the comparison operation.
Target Value Comparison
The specified interrupt task is executed when the high-speed counter PV
matches a target value registered in the table.
• The comparison conditions (target values and counting directions) are
registered in the comparison table along with the corresponding interrupt
task number. The specified interrupt task will be executed when the high-
speed counter PV matches the registered target value.
• Up to 48 target values (between 1 and 48) can be registered in the com-
parison table.
• A different interrupt task can be registered for each target value.
• The target value comparison is performed on all of the target values in the
table, regardless of the order in which the target values are registered.
• If the PV is changed, the changed PV will be compared with the target
values in the table, even if the PV is changed while the target value com-
parison operation is in progress.
Restrictions
A comparison condition (target value and count direction) cannot appear in
the table more than once. An error will occur if a comparison condition is
specified two or more times.
Note When the count direction (incrementing/decrementing) changes at a PV that
matches a target value, the next target value cannot be matched in that direc-
tion.
No. 001 No. 015 No. 000
No. 020
High-speed counter PV
Comparison is
executed without
regard to the order
of the values in the
table.
Target value 1
Target value 2
Target value 3
Target value 4
Interrupt task that is started.
Time
Comparison table
Number of values = 4
Target value 1 (Incrementing)
Interrupt task = 000
Target value 2 (Incrementing)
Interrupt task = 001
Target value 3 (Decrementing)
Interrupt task = 020
Target value 4 (Incrementing)
Interrupt task = 015
Содержание CP1H-CPU - 05-2006
Страница 1: ...OPERATION MANUAL CP1H CPU Unit SYSMAC CP Series CP1H X40D CP1H XA40D CP1H Y20DT D Cat No W450 E1 02...
Страница 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Страница 3: ...iv...
Страница 11: ...xii TABLE OF CONTENTS...
Страница 15: ...xvi...
Страница 19: ...xx...
Страница 31: ...xxxii Conformance to EC Directives 6...
Страница 71: ...40 Function Blocks Section 1 5...
Страница 133: ...102 Computing the Cycle Time Section 2 7...
Страница 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Страница 411: ...380 Clock Section 6 8...
Страница 519: ...488 Replacing User serviceable Parts Section 10 2...
Страница 527: ...496 Standard Models Appendix A...
Страница 535: ...504 Dimensions Diagrams Appendix B...
Страница 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Страница 659: ...628 PLC Setup Appendix G...
Страница 665: ...634 Index work words 159 write protection 370...
Страница 667: ...636 Revision History...