Omron CJ1G-CPU series, Programming Manual

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Index Registers Section 6-2
Direct Addressing of Index Registers
Index Registers can be directly addressed only in the instructions shown in
the following table.
Note Instructions for double-length operands (i.e., those with “L” at the end) are
used for index registers IR0 to IR15 because each register contains two
words.
6-2-3 Processing Related to Index Registers
The CS/CJ-series CPU Unit’s Table Data Processing instructions complement
the functions of the Index Registers. These instructions can be broadly
divided into the stack-processing and table-processing instructions
Instruction group Instruction name Mnemonic Primary function
Data Movement Instruc-
tions MOVE TO REGISTER MOVR(560) Stores the PLC memory address
of a bit or word in an Index Regis-
ter.
MOVE TIMER/COUNTER PV TO REG-
ISTER MOVRW(561)
Table Data Processing
Instructions SET RECORD LOCATION SETR(635)
GET RECORD NUMBER GETR(636) Outputs the PLC memory address
stored in an Index Register.
Data Movement Instruc-
tions DOUBLE MOVE MOVL(498) Transfers between Index Regis-
ters. Used for exchanges and
comparisons.
DOUBLE DATA EXCHANGE XCGL(562)
Comparison Instructions DOUBLE EQUAL =L(301)
DOUBLE NOT EQUAL
< >
L(306)
DOUBLE LESS THAN
<
L(311)
DOUBLE LESS THAN OR EQUAL
<
=L(316)
DOUBLE GREATER THAN
>
L(321)
DOUBLE GREATER THAN OR EQUAL
>
=L(326)
DOUBLE COMPARE CMPL(060)
Increment/Decrement
Instructions DOUBLE INCREMENT BINARY ++L(591) Changes the PLC memory
address in the Index Register by
incrementing, decrementing, or
offsetting its content.
DOUBLE DECREMENT BINARY – –L(593)
Symbol Math Instructions DOUBLE SIGNED BINARY ADD WITH-
OUT CARRY
+L(401)
DOUBLE SIGNED BINARY SUBTRACT
WITHOUT CARRY –L(411)
Special Instructions CONVERT ADDRESS FROM CV FRMCV(284) Convert actual PLC memory
addresses between CV-series and
CS/CJ-series addresses.
(CS1-H, CJ1-H, or CJ1M CPU
Units only)
CONVERT ADDRESS TO CV TOCV(285)
Processing Purpose Instructions
Stack processing Operate FIFO (first-in first-out) or
LIFO (last-in first-out) data tables,
and read, write, insert, delete, or
count data entries in data tables. SSET(630), PUSH(632), FIFO(633),
LIFO(634) and, for CS1-H, CJ1-H, or
CJ1M CPU Units only, SREAD(639),
SWRITE(640), SINS(641), SDEL(642),
SNUM(638)