92
Computing the Cycle Time
Section 2-7
4: I/O Refreshing
5: Peripheral Servicing
Details
Processing time and fluctuation cause
CPU Unit built-
in I/O and I/O
on CPM1A
Expansion
Units and
Expansion I/O
Units
Outputs from the CPU Unit to the actual
outputs are refreshed first for each Unit,
and then inputs.
I/O refresh time for each Unit multiplied by the number of
Units used.
CJ-series Spe-
cial I/O Units
Words allocated in CIO Area
I/O refresh time for each Unit multiplied by the number of
Units used.
Unit- specific
data
Example: CompoBus/S
remote I/O
CJ-series CPU
Bus Units
Words allocated in CIO and DM Areas
I/O refresh time for each Unit multiplied by the number of
Units used.
Unit- specific
data
Examples:
• Data links for Control-
ler Link Units
• DeviceNet remote I/O
• Send/receive data for
protocol macros
• Socket services for
specific control bits for
Ethernet Units
Details
Processing time and fluctuation cause
Services events for CJ-series Special I/O
Units.
Note
Peripheral servicing does not include
I/O refreshing,
If a uniform peripheral servicing time hasn’t been set in the PLC Setup for
this servicing, 4% 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 Units are mounted, the servicing time is 0 ms.
Services events for CJ-series CPU Bus
Units.
Note
Peripheral servicing does not include
I/O refreshing.
Services USB port.
If a uniform peripheral servicing time hasn’t been set in the PLC Setup for
this servicing, 4% 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, 4% 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, 4% 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.
Summary of Contents for CP1H-CPU - 05-2006
Page 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Page 3: ...iv...
Page 11: ...xii TABLE OF CONTENTS...
Page 15: ...xvi...
Page 19: ...xx...
Page 31: ...xxxii Conformance to EC Directives 6...
Page 71: ...40 Function Blocks Section 1 5...
Page 133: ...102 Computing the Cycle Time Section 2 7...
Page 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Page 411: ...380 Clock Section 6 8...
Page 519: ...488 Replacing User serviceable Parts Section 10 2...
Page 527: ...496 Standard Models Appendix A...
Page 535: ...504 Dimensions Diagrams Appendix B...
Page 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Page 659: ...628 PLC Setup Appendix G...
Page 665: ...634 Index work words 159 write protection 370...
Page 667: ...636 Revision History...