Stack Data Overwrite: Swrit(640) - Omron SYSMAC CJ - REFERENCE MANUAL 01-2008 Reference Manual

Table Data Processing Instructions
000000
SREAD
D00000
&3
D00100
Stack
pointer
Last word
in stack
Stack
pointer
Last word
in stack

3-17-16 STACK DATA OVERWRITE: SWRIT(640)

Purpose
Ladder Symbol
Variations
Applicable Program Areas
748
PLC memory address
D00000
of last word in the stack
D00001
D00002
Stack pointer
D00003
D00004 A
D00005
3
D00006
D00007
D00008
D00009
D00000
PLC memory address of
last word in the stack
D00001
D00002
Stack pointer
D00003
D00004
A
D00005
D00006
D00007
D00008
D00009
Writes the source data to the specified data element in the stack (overwriting
the existing data). The offset value indicates the location of the desired data
element (how many data elements before the current pointer position).
This instruction is supported by CS1-H, CJ1-H, CJ1M, and CS1D CPU Units
only.
SWRIT(640)
TB
C
S
Variations Executed Each Cycle for ON Condition
Executed Once for Upward Differentiation
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification
Block program areas
OK
PLC memory
address
D00100
The stack pointer position remains
unchanged after the data is read.
TB: First stack address
C: Offset value
S: Source word
Step program areas Subroutines
OK OK
Section 3-17
A
SWRIT(640)
@SWRIT(640)
Not supported.
Interrupt tasks
OK