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Analog I/O (XA CPU Units)
Section 5-5
Handling Unit Errors
When an error occurs in the built-in analog I/O system, analog input data will
be set to 0000 and the analog output will be set to 0 V or 0 mA.
If a CPU error occurs, the analog output will be set to is set to 0 V or 0 mA
even if the output range is 1 to 5 V or 4 to 20 mA. For any other fatal errors in
the CPU Unit, 1 V or 4 mA will be output if the output range is 1 to 5 V or 4 to
20 mA.
!Caution
If an interrupt task program is executed continuously for more than 6 ms, the
built-in analog function will not operate properly and a Built-in Analog Error
will occur. When using the built-in analog function, design the system so that
interrupt task programs are not executed too long or too frequently. Test the
system thoroughly in trial operation before operating the system.
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...