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56
CPU Unit Operating Modes
Section 2-5
Note
The following table shows the relationship of operating modes to tasks.
2-5-3
Operating Mode Changes and I/O Memory
Operating Mode Changes and I/O Memory
Note
1.
The following processing is performed if the I/O Memory Hold Bit is ON.
Outputs from Output Units will be turned OFF when operation stops even
if I/O bit status is held in the CPU Unit.
CX-Programmer
operations
I/O memory monitoring
OK
OK
OK
Program monitoring
OK
OK
OK
Program
transfers
From CPU Unit
OK
OK
OK
To CPU Unit
OK
X
X
Checking program
OK
X
X
Setting PLC Setup
OK
X
X
Changing program
OK
X
OK
Force-setting/resetting
OK
X
OK
Changing timer/counter SV
OK
X
OK
Changing timer/counter PV
OK
X
OK
Change I/O memory PV
OK
X
OK
Mode
Cyclic task status
Interrupt task
status
PROGRAM
Disabled status (INI)
Stopped
RUN
• Any task that has not yet been executed, will be in disabled status (INI).
• A task will go to READY status if the task is set to go to READY status at star-
tup or the TASK ON (TKON) instruction has been executed for it.
• A task in READY status will be executed (RUN status) when it obtains the
right to execute.
• A status will go to Standby status (WAIT) if a READY task is put into Standby
status by a TASK OFF (TKOF) instruction.
Executed if inter-
rupt condition is
met.
MONITOR
Mode Changes
Non-holding areas
Holding Areas
• I/O bits
• Data Link bits
• Work bits
• Timer PV/Completion Flags
• Index Registers
• Data Registers
• Task Flags
Auxiliary Area bits/words are holding or
non-holding depending on the address.
• HR Area
• DM Area
• Counter PV and Completion Flags
Auxiliary Area bits/words are holding or
non-holding depending on the address.
RUN or MONITOR to PROGRAM Cleared (See note 1.)
Held
PROGRAM to RUN or MONITOR Cleared (See note 1.)
Held
RUN to MONITOR or
MONITOR to RUN
Held (See note 2.)
Held
Operation
PROGRAM mode
RUN mode
MONITOR mode
Содержание CP1L-EL20DR-D
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Страница 22: ...xxii...
Страница 34: ...xxxiv Software Licenses and Copyrights 7...
Страница 178: ...144 Connecting the CX Programmer Section 5 1 Click the Connect button to connect and then connection online is completed...
Страница 192: ...158 Trial Operation and Debugging Section 5 3...
Страница 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Страница 666: ...632 Trouble Shooting Section 11 7...
Страница 696: ...662 Standard Models Appendix A...
Страница 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Страница 836: ...802 PLC Setup Appendix G...
Страница 838: ...804 TCP Status Transitions Appendix H...
Страница 840: ...806 Ethernet Network Parameters Appendix I...
Страница 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Страница 844: ...810 Ethernet Specifications Appendix K...
Страница 851: ...Index 817 work words 118 write protection 447...
Страница 852: ...818 Index...
Страница 854: ...820 Revision History...
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