Mitsubishi Electric MELSEC iQ-R Series, Programming Manual

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7 APPLICATION INSTRUCTIONS
7.20 Data Processing Instructions
CRC operation
CRC(P)
These instructions generate the CRC value for (n) 8-bit data (unit: byte) starting from the device specified by (s), and store the
CRC value to the device specified by (d).
■
Execution condition
Setting data
■
Description, range, data type
■
Applicable devices
*1 FX and FY cannot be used.
• The RnCPU and RnENCPU with firmware version "17" or later support these instructions. (Use an engineering tool with version "1.020W" or later.)
Ladder ST
ENO:=CRC(EN,s,n,d);
ENO:=CRCP(EN,s,n,d);
FBD/LD
Instruction Execution condition
CRC
CRCP
Operand Description Range Data type Data type (label)
(s) Start device where the target data of CRC value generation
is stored

16-bit signed binary ANY16
(d) Device where the generated CRC value is stored

16-bit signed binary ANY16
(n) Number of 8-bit data (unit: byte) for which the CRC value is
generated or the device storing the number of 8-bit data
(unit: byte) 0 to 65535 16-bit unsigned binary ANY16_U
EN Execution condition  Bit BOOL
ENO Execution result

Bit BOOL
Operand Bit Word Double word Indirect
specification
Constant Others
X, Y, M, L,
SM, F, B, SB,
FX, FY J  \  T, ST, C, D, W,
SD, SW, FD, R,
ZR, RD U  \G  , J  \  ,
U3E  \(H)G 
Z LT, LST,
LC LZ K, H E $
(s)

*1
          
(d) 
*1
          
(n) 
*1
          
RnCPU RnENCPU
RnSFCPU RnSFCPU RnPCPU RnPCPU
(Standard) (Safety) (Redundant) (Process)
(s) (d) (n)
EN ENO
s d
n