100
Computing the Cycle Time
Section 2-7
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.
Note
When there is one task, online editing is processed all in the cycle time follow-
ing the cycle in which online editing is executed (written). When there are mul-
tiple tasks (cyclic tasks and interrupt tasks), online editing is separated, so
that for n tasks, processing is executed over n to n
×
2 cycles max.
2-7-7
I/O Response Time
The I/O response time is the time it takes from when an input turns ON, the
data is recognized by the CPU Unit, and the user program is executed, up to
the time for the result to be output to an output terminal. The length of the I/O
response time depends on the following conditions.
• Timing of Input Bit turning ON.
• Cycle time.
Minimum I/O
Response Time
The I/O response time is shortest when data is retrieved immediately before I/
O refresh of the CPU Unit. The minimum I/O response time is calculated as
follows:
Minimum I/O response time = Input ON delay + Cycle time + Output ON delay
Note
The input and output ON delays depend on the type of terminals used on the
CPU Unit or the model number of the Unit being used.
Maximum I/O Response
Time
The I/O response time is longest when data is retrieved immediately after I/O
refresh period of the CPU Unit. The maximum I/O response time is calculated
as follows:
Maximum I/O response time = Input ON delay + (Cycle time
×
2) + Output ON
delay
Input
I/O refresh
Input ON delay
Output ON delay
Cycle time
Cycle time
(Interrupt to
CPU Unit)
Output
Minimum I/O
response time
Instruction
execution
Instruction
execution
Instruction
execution
Summary of Contents for Sysmac CP1H
Page 2: ......
Page 3: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised October 2014...
Page 4: ...iv...
Page 10: ...x...
Page 18: ...xviii...
Page 22: ...xxii...
Page 34: ...xxxiv Conformance to EC Directives 6...
Page 76: ...42 Function Blocks Section 1 5...
Page 176: ...142 CP series Expansion I O Unit Wiring Section 3 6...
Page 372: ...338 Analog I O XA CPU Units Section 5 5...
Page 578: ...544 Trouble Shooting Section 8 7...
Page 622: ...588 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Page 668: ...634 Standard Models Appendix A...
Page 744: ...710 Auxiliary Area Allocations by Address Appendix D...
Page 771: ...737 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 772: ...738 Connections to Serial Communications Option Boards Appendix F...
Page 800: ...766 Specifications for External Power Supply Expansion Appendix H...
Page 806: ...772 Index W Work Area 165 work bits 165 work words 165 write protection 379...
Page 808: ...774 Revision History...
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