Frame Checksum: Fcs(180) - Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual

Table Data Processing Instructions
Flags
Examples
R1

3-17-13 FRAME CHECKSUM: FCS(180)

Purpose
738
Name Label
Error Flag ER
Equals Flag =
Negative Flag N
When CIO 000000 is ON in the following example, SUM(184) adds 10 bytes
of unsigned binary data beginning with the rightmost byte of D00100 and
writes the result to D00201 and D00200.
Number of words/bytes
C+1: D00301
Data type
0: Unsigned binary data
C: D00300
R1:
C 3
9 F
2 7
2 A
D C
D: D00200
0 3
D+1: D00201 0 0
Calculates the FCS value for the specified range and outputs the result in
ASCII.
Operation
ON if the content of C is not within the specified range of
0001 through FFFF.
ON if the BCD data has been specified, but the range
contains binary data.
ON if the Communications Port Enabled Flag for the com-
munications port number specified as the Com Port num-
ber for Background Execution is OFF when background
processing is specified.
OFF in all other cases.
ON if the result is 0000.
OFF in all other cases.
ON if bit 15 is ON in the result.
OFF in all other cases.
Always 0.
Starting byte
1: Rightmost byte
Units
1: Bytes
Data type
0: Binary
10 bytes
Table length
2 A
2 A
2 0
2 0
5 5
7 8
0 0
Section 3-17
The shaded bytes are added.