Omron CJ - INSTRUCTIONS User Manual

3. Instructions
608
CS/CJ/NSJ Series Instructions Reference Manual (W474)
FCS
Applicable Program Areas
Operands
z Operand Specifications
Instruction Mnemonic Variations
Function
code
Function
FRAME CHECKSUM FCS @FCS 180
Calculates the FCS value for the specified range
and outputs the result in ASCII.
Symbol
FCS
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
C First control word UDINT 2
R1 First word in range UINT Variable
D First destination word UINT Variable
C: First control word R1: First word in range
D: First destination word
Note C and C+1, all of the words in the calculation range must
be in the same data area.
Area
Word addresses
Indirect DM/EM
addresses
Con-
stants
Registers Flags
Pulse
bits
TR
bits
CIO WR HR AR T C DM EM
@DM
@EM
*DM
*EM
DR IR
Indirect
using IR
TK CF
C
OK OK OK OK OK OK OK OK OK OK
OK
--- --- OK --- --- --- ---R1
---
D
C: First control word
R1: First word in range
D: First destination word
FCS(180)
C
R1
D
15 0
C
15 014
0
C+1
13 12 11
0000 0000 000000
0
Calculation units
W: Number of words/bytes in range
&1 to &65535 (decimal) or
#0001 to #FFFF (hex)
Starting byte (Valid only when bit 13 is 1.)
0: Leftmost byte
1: Rightmost byte
0: Words
1: Bytes
R1
15 0
R1+(W–1)
to
to
Calculation range
D
0
15
When bytes are specified as the operation units:
When words are specified as the operation units:
D+1
0
15
D
0
15
The leftmost four digits are stored in D+1 and the rightmost
four digits are stored in D.

Omron CJ - INSTRUCTIONS Specifications

General

Brand	Omron
Model	CJ - INSTRUCTIONS
Category	Controller
Language	English