Omron CJ - PROGRAMMING MANUAL 08-2008 Programming Manual page 311

Cycle Time/High-speed Processing
Applicable Instructions
Differences between Instructions Executed Normally and in the Background
ground execution so that no more than one instruction is executed at
the same time.
3. If an instruction for which background execution has been specified is ex-
ecuted, execution will only be started in the cycle in which the execution
condition was met and execution will not be completed in the same cycle.
4. When background execution is started, the Communications Port Enabled
Flag for that port will be turned OFF.
5. Background execution will be continued over several cycles.
6. When processing has been completed, the Communications Port Enabled
Flag for that port will be turned ON. This will enable another instruction to
be executed in the background.
Background processing will not be performed for the following instructions
when they are used in function blocks. They will be executed using normal
processing.
■ Table Data Processing Instructions
Instruction
DATA SEARCH
SWAP BYTES
FIND MAXIMUM
FIND MINIMUM
SUM
FRAME CHECKSUM
■ Text String Processing Instructions
Instruction
MOVE STRING
CONCATENATE STRING
GET STRING LEFT
GET STRING RIGHT
GET STRING MIDDLE
FIND IN STRING
STRING LENGTH
REPLACE IN STRING
DELETE STRING
EXCHANGE STRING
CLEAR STRING
INSERT INTO STRING
■ Data Shift Instructions
Instruction
ASYNCHRONOUS SHIFT REGISTER
The differences between normal instruction execution and execution in the
background are listed below.
■ Outputting to Index Registers (IR)
If MAX(182) or MIN(183) is executed to output the I/O memory map address
of the word containing the minimum or maximum value to an index register,
Section 6-1
Mnemonic
SRCH
SWAP
MAX
MIN
SUM
FCS
Mnemonic
MOV$
+$
LEFT$
RIGHT$
MID$
FIND$
LEN$
RPLC$
DEL$
XCHG$
CLR$
INS$
Mnemonic
ASFT
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