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85
PC Link System I/O Response Time
Appendix C
Maximum I/O Response Time (in Asynchronous Mode)
Maximum I/O response time =
Input ON delay + Cycle time of PLC #0 + Peripheral processing time of PLC
#0 + (PC Link cycle time
×
2) + Polling sequence processing time + (Periph-
eral processing time PLC #7
×
2) + Cycle time of PLC #7 + Output ON delay
• Example Calculation
Maximum I/O response time = 1.5 + 20 + 3 + (32.4
×
2) + 120 + (3
×
2) + 50 + 15 = 280.3 ms
Note
The I/O response time may be extended by environmental factors such as noise.
Node 0
(PLC #0)
PC Link transmission
Input
PC Link buffer
Node 7
(PLC #7)
Output
Peripheral
processing cycle
PC Link buffer
Instruction
execution cycle
Peripheral
processing cycle
Instruction
execution cycle
Cycle
time
Instruction execution
I/O refreshing
Max. transmission time
PC Link
cycle time
Cycle
time
Instruction
execution
Solicitation
sequence
processing
Input ON delay
1.5 ms
Output ON delay
15 ms
Cycle time of PLC #0
20 ms
Peripheral processing time of PLC #0
3 ms
Cycle time of PLC #7
50 ms
Peripheral processing time of PLC #7
3 ms
PC Link Cycle Time
2.8
×
8 Units + 10 = 32.4 ms
Polling sequence processing time
15 ms
×
(16 Units
−
8 Units) = 120 ms
Содержание CVM1 Series
Страница 1: ...Cat No W434 E1 01 SYSMAC CVM1 CV Series CVM1 LK401 PC Link Unit This manual is PDF file only...
Страница 2: ...CVM1 LK401 PC Link Unit Operation Manual Produced July 2004...
Страница 3: ...iv...
Страница 5: ...vi...
Страница 41: ...26 Differences from Earlier PC Link Units Section 2 6...
Страница 77: ...62 Replacement Checklists Section 3 6...
Страница 95: ...80 Link Adapter Specifications Appendix B...
Страница 101: ...86 PC Link System I O Response Time Appendix C...
Страница 103: ...88 PC Link Settings and Status Areas Appendix D...
Страница 105: ...Revision History 90...