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Computing the Cycle Time
Section 2-7
5: Peripheral Servicing
2-7-3
Functions Related to the Cycle Time
Minimum Cycle Time
Set the minimum cycle time to a non-zero value to eliminate inconsistencies in
I/O responses. A minimum cycle time can be set in the PLC Setup between 1
and 32,000 ms in 1-ms increments.
This setting is effective only when the actual cycle time is shorter than the
minimum cycle time setting. If the actual cycle time is longer than the mini-
mum cycle time setting, the actual cycle time will remain unchanged.
PLC Setup
Details
Processing time and fluctuation cause
Services USB port.
If a uniform peripheral servicing time hasn’t been set in the PLC Setup for
this servicing, 8% of the previous cycle’s cycle time (calculated in step (3))
will be allowed for peripheral servicing.
If a uniform peripheral servicing time has been set in the PLC Setup, servic-
ing will be performed for the set time. Servicing will be performed for at
least 0.1 ms, however, whether the peripheral servicing time is set or not.
If the ports are not connected, the servicing time is 0 ms.
Services serial ports
Services communications ports.
If a uniform peripheral servicing time hasn’t been set in the PLC Setup for
this servicing, 8% of the previous cycle’s cycle time (calculated in step (3))
will be allowed for peripheral servicing.
If a uniform peripheral servicing time has been set in the PLC Setup, servic-
ing will be performed for the set time. Servicing will be performed for at
least 0.1 ms, however, whether the peripheral servicing time is set or not.
If no communications ports are used, the servicing time is 0 ms.
Services built-in flash memory access.
If a uniform peripheral servicing time hasn’t been set in the PLC Setup for
this servicing, 8% of the previous cycle’s cycle time (calculated in step (3))
will be allowed for peripheral servicing.
If a uniform peripheral servicing time has been set in the PLC Setup, servic-
ing will be performed for the set time. Servicing will be performed for at
least 0.1 ms, however, whether the peripheral servicing time is set or not.
If there is no access, the servicing time is 0 ms.
Serves Memory Cassette access.
Minimum cycle time
(effective)
Minimum cycle time
(effective)
Minimum cycle time
(effective)
Actual cycle
time
Actual cycle
time
Actual cycle
time
Minimum cycle time
Actual cycle
time
Minimum cycle time
Actual cycle
time
Minimum cycle time (effective)
Actual cycle
time
Name
Settings
Default
Minimum cycle time
0000 to 7D00 hex
(1 to 32,000 ms in 1-ms incre-
ments)
0000 hex: Variable cycle time
Summary of Contents for CP1L CPU UNIT - 03-2009
Page 1: ...Cat No W462 E1 06 CP1L CPU Unit SYSMAC CP Series CP1L L_0D_ CP1L M_0D_ OPERATION MANUAL...
Page 2: ......
Page 4: ...iv...
Page 10: ...x...
Page 22: ...xxii...
Page 34: ...xxxiv Conformance to EC Directives 6...
Page 70: ...36 Function Blocks Section 1 5...
Page 584: ...550 Trouble Shooting Section 8 7...
Page 627: ...593 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Page 630: ...596 Sample Application Section 9 12...
Page 654: ...620 Troubleshooting Unit Errors Section 11 4...
Page 662: ...628 Replacing User serviceable Parts Section 12 2...
Page 668: ...634 Standard Models Appendix A...
Page 698: ...664 Auxiliary Area Allocations by Function Appendix C...
Page 746: ...712 Auxiliary Area Allocations by Address Appendix D...
Page 773: ...739 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 774: ...740 Connections to Serial Communications Option Boards Appendix F...
Page 806: ...772 Index...
Page 808: ...774 Revision History...