![background image](http://html1.mh-extra.com/html/omron/cp1l-l14d-series/cp1l-l14d-series_operation-manual_742090161.webp)
128
Overview of I/O Memory Area
Section 4-1
Auxiliary Area Flags and Words
When the IOM Hold Bit is ON, all outputs from Output Units will be maintained
when program execution stops. When the program starts again, outputs will
have the same status that they had before the program was stopped and
instructions will be executed. (When the IOM Hold Bit is OFF, instructions will
be executed after the outputs have been cleared.)
PLC Power ON
In order for all data* in I/O memory to be retained when the PLC is turned ON,
the IOM Hold Bit must be ON and it must be protected in the PLC Setup using
the
IOM Hold Bit Status at Startup
parameter.
Auxiliary Area Flags and Words
PLC Setup
Name
Address
Description
IOM Hold Bit
A500.12
Specifies whether the I/O memory will be retained or not
when the CPU Unit operating mode is changed
(between PROGRAM and RUN/MONITOR) or when the
power is cycled.
OFF: I/O memory is cleared to 0 when the operating
mode is changed.
ON:
I/O memory is retained when the operating mode
is changed between PROGRAM and RUN or
MONITOR.
Name
Address
Description
IOM Hold Bit
A500.12
Specifies whether the I/O memory will be retained or
not when the CPU Unit operating mode is changed
(between PROGRAM and RUN/MONITOR) or when
the power is cycled.
OFF: I/O memory is cleared to 0 when the operating
mode is changed.
ON:
I/O memory is retained when the operating
mode is changed between PROGRAM and
RUN or MONITOR.
Name
Description
Setting
Default
IOM Hold
Bit Status
at Startup
To retain all data in I/O
memory when the PLC
is turned ON, set the
IOM Hold Bit at startup
parameter to hold the
status of the I/O Hold Bit.
OFF:
The IOM Hold Bit is cleared
to 0 when power is cycled.
ON:
The status of the IOM Hold
Bit is retained when power is
cycled.
OFF
(Cleared)
Retained
Power ON
I/O memory
CIO and
other areas
Содержание CP1L-L14D Series
Страница 2: ...CP1L L14D CP1L L20D CP1L M30D CP1L M40D CP1L CPU Unit Operation Manual Revised June 2007...
Страница 3: ...iv...
Страница 9: ...x...
Страница 13: ...xiv TABLE OF CONTENTS...
Страница 21: ...xxii...
Страница 33: ...xxxiv Conformance to EC Directives 6...
Страница 65: ...32 Function Blocks Section 1 5...
Страница 153: ...120 CP CPM1A series Expansion I O Unit Wiring Section 3 6...
Страница 523: ...490 Troubleshooting Unit Errors Section 9 4...
Страница 531: ...498 Replacing User serviceable Parts Section 10 2...
Страница 563: ...530 Auxiliary Area Allocations by Function Appendix C...
Страница 611: ...578 Auxiliary Area Allocations by Address Appendix D...
Страница 638: ...605 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 639: ...606 Connections to Serial Communications Option Boards Appendix F...
Страница 669: ...636 Index...
Страница 671: ...638 Revision History...