10
Operating Modes Section 1-4
RUN Mode This mode is used for normal program execution. The RUN indicator will be lit.
Some Programming Device operations like online editing, force-set/force-
reset, and changing I/O memory values are disabled in this mode, but other
Programming Device operations like monitoring the status of program execu-
tion (monitoring programs and monitoring I/O memory) are enabled.
Use this mode for normal system operation. Task execution is the same as in
MONITOR mode.
See 10-2 CPU Unit Operating Modes in the Operation Manual for more details
on operations that are available in each operating mode.
1-4-2 Initialization of I/O Memory
The following table shows which data areas will be cleared when the operat-
ing mode is changed from PROGRAM mode to RUN/MONITOR mode or vice-
versa.
Note 1. Non-held areas: CIO Area, Work Area, Timer PVs, Timer Completion
Flags, Index Registers, Data Registers, Task Flags, and Condition Flags.
(The statuses of some addresses in the Auxiliary Area are held and others
are cleared.)
2. Held areas: Holding Area, DM Area, EM Area, Counter PVs, and Counter
Completion Flags.
3. Data in I/O memory will be retained when the IOM Hold Bit (A50012) is ON.
When the IOM Hold Bit (A50012) is ON and operation is stopped due to a
fatal error (including FALS(007)), the contents of I/O memory will be re-
tained but outputs on Output Units will all be turned OFF.
Mode change Non-held Areas
(Note 1)
Held Areas
(Note 2)
RUN/MONITOR → PROGRAM Clear (See note 3.) Retained
PROGRAM → RUN/MONITOR Clear (See note 3.) Retained
RUN ↔ MONITOR Retained Retained
To Next Page
Loading...
