Omron CS1G/H-CPUxxH Instructions Manual page 639

Table Data Processing Instructions
Stack Instructions
618
Instruction
LAST IN FIRST OUT
DIMENSION RECORD TABLE DIM
SET RECORD LOCATION
GET RECORD NUMBER
DATA SEARCH
SWAP BYTES
FIND MAXIMUM
FIND MINIMUM
SUM
FRAME CHECKSUM
STACK NUMBER OUTPUT
STACK DATA READ
STACK DATA OVERWRITE
STACK DATA INSERT
STACK DATA DELETE
All of these instructions define or operate on a group of words. The group of
words in a stack are defined by SSET(630), the group of words in a record-
table are defined by DIM(631), and the group of words used in a range
instruction are defined independently in each instruction.
Group
Stack Operate FIFO (first-in first-out) or LIFO
(last-in first-out) data tables.
Record-table Operate tables of data made up of
records. (Record size is user-defined.)
Range Operates on a range of words to find
values such as the checksum, a particu-
lar value, the maximum value, or mini-
mum value in the range.
Stack instructions act on specially defined data tables called stacks. The first
two words of the stack contain the PLC memory address of the last word in
the stack and the second two words contain the stack pointer (the PLC mem-
ory address of the word that will be overwritten by the next PUSH(632)
instruction).
Mnemonic
LIFO 634
631
SETR 635
GETR 636
SRCH 181
SWAP 637
MAX 182
MIN 183
SUM 184
FCS 180
SNUM 638
SREAD 639
SWRIT 640
SINS 641
SDEL 642
Purpose
I/O memory
Stack region
Section 3-17
Function code Page
632
635
638
640
642
644
646
650
653
656
659
662
665
668
671
Instructions
SSET(630), PUSH(632),
FIFO(633), LIFO(634),
SREAD(639), SWRIT(640),
SINS(641), SDEL(642), and
SNUM(638)
DIM(631), SETR(635), and
GETR(636)
FCS(180), SRCH(181),
MAX(182), MIN(183),
SUM(184), and SWAP(637)