Omron C200HE 用户手册

In the following example, the content of C (HR 00) is 9010, and COLL(81) is used
to copy the oldest entries from a10-word stack (IR 001 to IR 010) to LR 20.

Stack pointer
decremented

After one
execution

After two
executions

DIST(80)

001

HR 00

LR 20

00001

00000

LD

00001

00001

COLL(81)

001

HR

00

LR

20

IR 001

Before
execution

1

2

3 4

0

0

0  2

A B C D

A B C D

0

0

0  1

0

0

0  0

IR 002

IR 003

IR 010

IR 001

IR 002

IR 003

IR 010

IR 001

IR 002

IR 003

IR 010

Stack pointer
decremented

Stack pointer

Stack area

Output

1

2

3 4

LR 20

Output

A B C D

LR 20

When the execution condition is OFF, COLL(81) is not executed. When the
execution condition is ON, COLL(81) copies the data most recently recorded in
the stack to D. The stack pointer, SBs, is then decremented by 1.

Specifies the stack length (000 to 999).

A value of 8 indicates LIFO stack operation.

Digits of C:

3 2 1 0

Data can be added to the stack until it is full. DIST(80)’s stack operation can be
used together with COLL(81)’s read stack operation. COLL(81) can be set to
read on a FIFO or LIFO basis. Refer to 5-16-6 SINGLE WORD DISTRIBUTE
(80) for details.

Note LIFO stands for Last-In-First-Out.