Omron CJ - PROGRAMMING MANUAL 12-2009 Programming Manual page 386

CPU Processing Modes
Auxiliary Area Flags and Words
Parallel Processing with Asynchronous Memory Access
346
The following table shows the corresponding settings when using a Program-
ming Console.
Program- Name
ming
Console
address
Word Bit
+219 08 to CPU Pro-
15 cessing
Mode
Name Address
Peripheral Servicing A40515
Cycle Time Over
Peripheral Servicing A268
Cycle Time
Instruction Execu- A266 and
tion Time (Total of all A267
slice times for pro-
gram execution and
all slice times for
peripheral servicing)
Program Executions
Overseeing
Instruction execution time
Minimum cycle time calculations
Cyclic ser- I/O refresh
vicing
Special I/O refresh
for CPU Bus Units
Peripheral File access
servicing
Setting
00 Hex: Normal Mode
01 Hex: Parallel Processing with
Synchronous Memory Access
02 Hex: Parallel Processing with
Asynchronous Memory Access
05 to FF Hex: Time slice pro-
gram execution time for Periph-
eral Servicing Priority Mode (5 to
255 ms in 1-ms increments)
Settings of 03 and 04 Hex are
not defined (illegal) and will
cause PLC Setup errors (nonfa-
tal).
Operation
Turns ON when the peripheral servicing cycle
time exceeds 2 s. Operation will be stopped.
Contains the peripheral servicing cycle time when
one of the Parallel Processing Modes (synchro-
nous or asynchronous memory access) is used
and the PLC is in RUN or MONITOR mode. The
time will be in binary between 0.0 and 2000.0 (in
0.1-ms increments).
In normal mode, only the instruction execution
time is included. The time is stored as a 32-bit
binary value.
00000000 to FFFFFFFF Hex (unit: 0.1 ms)
(0 to 429,496,729.5 ms)
A266: Least-significant word
A267: Most-significant word
I/O bus check and other processing
0.3 ms (0.28 ms in CJ1-H-R CPU Units)
Total execution time for all instructions
Processing time for a minimum program execution
cycle time
I/O refresh time for each Unit × Number of Units
Special I/O refresh time for each Unit × Number of
Units
Peripheral service time set in PLC Setup (default:
4% of cycle time)
Section 6-8
Default CPU Unit
refresh
timing
00 Hex: Start of
Normal operation
Mode