![background image](http://html1.mh-extra.com/html/omron/cp1h-cpu-05-2006/cp1h-cpu-05-2006_operation-manual_742082177.webp)
146
Overview of I/O Memory Area
Section 4-1
4-1-3
Clearing and Holding I/O Memory
Note
1.
Mode changed from PROGRAM to RUN/MONITOR or vice-versa.
2.
The PLC Setup’s IOM Hold Bit Status at Startup setting determines wheth-
er the IOM Hold Bit’s status is held or cleared when the PLC is turned ON.
4-1-4
Hot Start/Hot Stop Functions
Operating Mode Changes
Hot Start
Turn ON the IOM Hold Bit to retain all data* in I/O memory when the CPU Unit
is switched from PROGRAM mode to RUN/MONITOR mode to start program
execution.
Hot Stop
When the IOM Hold Bit is ON, all data* in I/O memory will also be retained
when the CPU Unit is switched from RUN or MONITOR mode to PROGRAM
mode to stop program execution.
Area
Mode changed
1
Fatal error generated
PLC power turned ON
Execution of FALS
Other fatal errors
PLC Setup set to
clear IOM Hold Bit
status
2
PLC Setup set to
hold IOM Hold Bit
status
2
IOM Hold
Bit OFF
IOM Hold
Bit ON
IOM Hold
Bit OFF
IOM Hold
Bit ON
IOM Hold
Bit OFF
IOM Hold
Bit ON
IOM Hold
Bit OFF
IOM Hold
Bit ON
IOM Hold
Bit OFF
IOM Hold
Bit ON
CIO
Area
I/O Area
Cleared
Retained
Retained
Retained
Cleared
Retained
Cleared
Cleared
Cleared
Retained
Built-in Analog I/O Areas
(XA CPU Units only)
Data Link Area
CPU Bus Unit Area
Special I/O Unit Area
Serial PC Link Area
DeviceNet Area
Internal I/O Area
Work Area (W)
Cleared
Retained
Retained
Retained
Cleared
Retained
Cleared
Cleared
Cleared
Retained
Holding Area (H)
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Auxiliary Area (A)
Status treatment depends on address.
Data Memory Area (D)
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Timer Completion Flags (T)
Cleared
Retained
Retained
Retained
Cleared
Retained
Cleared
Cleared
Cleared
Retained
Timer PVs (T)
Cleared
Retained
Retained
Retained
Cleared
Retained
Cleared
Cleared
Cleared
Retained
Counter Completion Flags (C)
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Counter PVs (C)
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Task Flags (TK)
Cleared
Cleared
Retained
Retained
Cleared
Cleared
Cleared
Cleared
Cleared
Cleared
Index Registers (IR)
Cleared
Retained
Retained
Retained
Cleared
Retained
Cleared
Cleared
Cleared
Retained
Data Registers (DR)
Cleared
Retained
Retained
Retained
Cleared
Retained
Cleared
Cleared
Cleared
Retained
PROGRAM
Retain
I/O memory
CIO and
other areas
MONITOR or RUN
PROGRAM
Retain
MONITOR or RUN
I/O memory
CIO and
other areas
Содержание CP1H-CPU - 05-2006
Страница 1: ...OPERATION MANUAL CP1H CPU Unit SYSMAC CP Series CP1H X40D CP1H XA40D CP1H Y20DT D Cat No W450 E1 02...
Страница 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Страница 3: ...iv...
Страница 11: ...xii TABLE OF CONTENTS...
Страница 15: ...xvi...
Страница 19: ...xx...
Страница 31: ...xxxii Conformance to EC Directives 6...
Страница 71: ...40 Function Blocks Section 1 5...
Страница 133: ...102 Computing the Cycle Time Section 2 7...
Страница 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Страница 411: ...380 Clock Section 6 8...
Страница 519: ...488 Replacing User serviceable Parts Section 10 2...
Страница 527: ...496 Standard Models Appendix A...
Страница 535: ...504 Dimensions Diagrams Appendix B...
Страница 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Страница 659: ...628 PLC Setup Appendix G...
Страница 665: ...634 Index work words 159 write protection 370...
Страница 667: ...636 Revision History...