740
Table Data Processing Instructions
Section 3-17
Ladder Symbol
Variations
Applicable Program Areas
Operands
C and C+1: Control words
C specifies the number of units (bytes or words) to be used in the FCS calcu-
lation. (Bit 13 of C+1 determines whether bytes or words are being used.)
When bit 13 of C+1 has been set to 1, FCS(180) calculates the FCS value for
bytes of data. In this case, bit 12 determines whether the calculation starts
with the rightmost byte of R1 (bit 12 = 1) or the leftmost byte of R1 (bit 12 = 0).
Note
C and C+1 must be in the same data area.
R1: First word in range
R1 specifies the first word in the range. The length of the range depends on
the number of units as well as the starting byte, if bytes are being used in the
calculation.
Note
All of the words in the calculation range must be in the same data area.
FCS(180)
C
R1
D
C
: First control word
R1
: First word in range
D
: First destination word
Variations
Executed Each Cycle for ON Condition
FCS(180)
Executed Once for Upward Differentiation
@FCS(180)
Executed Once for Downward Differentiation
Not supported.
Immediate Refreshing Specification
Not supported.
Block program areas
Step program areas
Subroutines
Interrupt tasks
OK
OK
OK
OK
15
0
C
15
0
14
0
C+1
13 12 11
0000 0000 0000
00
0
Calculation units
Number of words/bytes in range
Starting byte (Valid only when bit 13 is 1.)
0: Leftmost byte
1: Rightmost byte
0: Words
1: Bytes
R1
15
0
R1+(C units–1)
to
to
Calculation range
Summary of Contents for SYSMAC CS1D-CPU**
Page 3: ...iv...
Page 29: ...xxx...
Page 185: ...146 List of Instructions by Function Code Section 2 4...
Page 1389: ...1350 CJ series Instruction Execution Times and Number of Steps Section 4 2...
Page 1390: ...1351 Appendix A ASCII Code Table ASCII SP Four leftmost bits Four rightmost bits...
Page 1391: ...1352 ASCII Code Table Appendix A...