3. Instructions
568
CS/CJ/NSJ Series Instructions Reference Manual (W474)
SWRIT
Applicable Program Areas
Operands
TB: First stack address
TB through TB+3: Stack control words TB+4 through TB+(N-1): Data storage region
Instruction Mnemonic Variations
Function
code
Function
STACK DATA OVERWRITE SWRIT @SWRIT 640
Writes the source data to the specified data ele-
ment 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).
Symbol
SWRIT
Area
Function block
definitions
Block program areas Step program areas Subroutines Interrupt tasks
SFC action or
transition programs
Usage OK OK OK OK OK OK
Operand Description Data type Size
TB First stack address UINT Variable
C Offset value UINT 1
S Source word UINT 1
TB: First stack address
C: Offset value
S: Source word
SWRIT(640)
TB
C
S
TB
0
15
TB+1
0
15
TB+2
0
15
TB+3
0
15
PLC memory address of the last
word in the stack (rightmost 4 digits)
PLC memory address of the last
word in the stack (leftmost 4 digits)
Stack pointer (rightmost 4 digits)
(Initial value is the rightmost 4 digits of
the PLC memory address for TB+4.)
Stack pointer (leftmost 4 digits)
(Initial value is the leftmost 4 digits of
the PLC memory address for TB+4.)
15 0
TB+4
TB+(N–1)
Data storage region
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