Omron CJ - PROGRAMMING MANUAL 12-2009 - Page 386

346
CPU Processing Modes Section 6-8
The following table shows the corresponding settings when using a Program-
ming Console.
Auxiliary Area Flags and Words
Parallel Processing with Asynchronous Memory Access
Program Executions
Program-
ming
Console
address
Name Setting Default CPU Unit
refresh
timing
Word Bit
+219 08 to
15
CPU Pro-
cessing
Mode
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).
00 Hex:
Normal
Mode
Start of
operation
Name Address Operation
Peripheral Servicing
Cycle Time Over
A40515 Turns ON when the peripheral servicing cycle
time exceeds 2 s. Operation will be stopped.
Peripheral Servicing
Cycle Time
A268 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).
Instruction Execu-
tion Time (Total of all
slice times for pro-
gram execution and
all slice times for
peripheral servicing)
A266 and
A267
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
Overseeing I/O bus check and other processing
0.3 ms (0.28 ms in CJ1-H-R CPU Units)
Instruction execution time Total execution time for all instructions
Minimum cycle time calculations Processing time for a minimum program execution
cycle time
Cyclic ser-
vicing
I/O refresh I/O refresh time for each Unit × Number of Units
Special I/O refresh
for CPU Bus Units
Special I/O refresh time for each Unit × Number of
Units
Peripheral
servicing
File access Peripheral service time set in PLC Setup (default:
4% of cycle time)