67
Computing the Cycle Time
Section 2-7
Calculation Example
Conditions:
Input ON delay
1 ms (normal input with input
constant set to 0 ms)
Output ON delay
0.1 ms (transistor output)
Cycle time
20 ms
Minimum I/O response time = 1 ms + 20 ms + 0.1 ms = 21.1 ms
Maximum I/O response time = 1 ms + (20 ms
×
2) + 0.1 ms = 41.1 ms
Input Response
Times
Input response times can be set in the PLC Setup. Increasing the response
time reduces the effects of chattering and noise. Decreasing the response
time allows reception of shorter input pulses, (but the pulse width must be
longer than the cycle time).
PLC Setup
Input
I/O refresh
Input ON delay
Output ON delay
Cycle time
Cycle time
(Interrupt to
CPU Unit)
Output
Maximum I/O
response time
Instruction
execution
Instruction
execution
Instruction
execution
Input
Input response time
Input
I/O refresh
CPU Unit
CPU Unit
Input response time
The pulse width is
less than the input
response time, so
it is not detected.
I/O refresh
Name
Description
Settings
Default
Input constants
Input response times 00 hex: 8 ms
10 hex: 0 ms
11 hex: 0.5 ms
12 hex: 1 ms
13 hex: 2 ms
14 hex: 4 ms
15 hex: 8 ms
16 hex: 16 ms
17 hex: 32 ms
00 hex (8 ms)
Summary of Contents for CP1L-EL20DR-D
Page 3: ...CP1L EL20D CP1L EM30D CP1L EM40D CP1L EL EM CPU Unit Operation Manual Produced July 2017...
Page 4: ...iv...
Page 10: ...x...
Page 22: ...xxii...
Page 34: ...xxxiv Software Licenses and Copyrights 7...
Page 192: ...158 Trial Operation and Debugging Section 5 3...
Page 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Page 666: ...632 Trouble Shooting Section 11 7...
Page 696: ...662 Standard Models Appendix A...
Page 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Page 836: ...802 PLC Setup Appendix G...
Page 838: ...804 TCP Status Transitions Appendix H...
Page 840: ...806 Ethernet Network Parameters Appendix I...
Page 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Page 844: ...810 Ethernet Specifications Appendix K...
Page 851: ...Index 817 work words 118 write protection 447...
Page 852: ...818 Index...
Page 854: ...820 Revision History...
Page 855: ......