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96
Computing the Cycle Time
Section 2-7
Conditions
Calculation Example
2-7-6
Online Editing Cycle Time Extension
When online editing is executed to change the program from the CX-Program-
mer while the CPU Unit is operating in MONITOR mode, the CPU Unit will
momentarily suspend operation while the program is being changed. The
period of time that the cycle time is extended is determined by the following
conditions.
• Number of steps changed
• Editing operations (insert/delete/overwrite)
• Types of instructions
The cycle time extension for online editing is negligibly affected by the size of
task programs. If the maximum program size for a task is 20 Ksteps, the
online editing cycle time extension will be as follows:
When editing online, the cycle time will be extended by according to the edit-
ing that is performed. Be sure that the additional time will not adversely affect
system operation.
Item
Details
CP1H
CPM1A-40EDR
40-pt I/O Unit
2 Units
CPM1A-20EDT
20-pt I/O Unit
2 Units
CPM1A-8EDA
8-pt Output Unit
1 Unit
User program
5 K steps
LD instructions: 2.5 Ksteps,
OUT instructions: 2.5 Ksteps
USB port connection
Yes and no
Fixed cycle time processing
No
Serial port connection
No
Peripheral servicing with other
devices (Special I/O Units and
CPU Bus Units)
No
Process name
Calculation
Processing time
USB port
connected
USB port not
connected
(1) Overseeing
---
0.7 ms
0.7 ms
(2) Program execution
0.1
µ
s
×
2,500 + 0.1
µ
s
×
2,500
0.5 ms
0.5 ms
(3) Cycle time calculation (Minimum cycle time not
set)
0 ms
0 ms
(4) I/O refreshing
0.39 ms
×
2 + 0.18 ms
×
2 + 0.08
1.22 ms
1.22 ms
(5) Peripheral servicing
(Only USB port con-
nected
0.1 ms
0 ms
Cycle time
(1) + (2) + (3) + (4) + (5)
2.52 ms
2.42 ms
CPU Unit
Increase in cycle time for online editing
CP1H CPU Unit
Maximum: 26 ms, Normal: 14 ms
(for a program size of 20 Ksteps)
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...