Mitsubishi Electric FX3G SERIES Programming Manual page 597

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. Related device
Related device
*1
M8161
*1. Cleared when the PLC mode is changed from RUN to STOP.
Caution
In this instruction, "X
many other standard polynomials for generating the CRC value. Note that the CRC value completely differs if an
adopted polynomial is different.
Reference: Major polynomials for generating the CRC value
Name
12
CRC-12
X
16
CRC-16
X
32
CRC-32
X
16
CRC-CCITT
X
Errors
An operation error is caused in the following cases; The error flag M8067 turns ON, and the error code is stored in
D8067.
• When any digits other than 4 digits are specified as
K6706)
• When n is outside the allowable range (1 to 256) (error code: K6706)
• When a device specified by
Description
ON CRC instruction operates in the 8-bit mode.
OFF CRC instruction operates in the 16-bit mode.
16 15 2
+ X + X + 1" is used as a polynomial for generating the CRC value (CRC-16). There are
11 3 2
+ x + X + X + X + 1
15 2
+ X + X + 1
26 23 22 16 12
+ X + X + X + X + X + X
12 5
+ X + X + 1
S +n-1 or D
24.4 FNC188 – CRC / Cyclic Redundancy Check
Polynomial
11 10 8 7 5 4 2
+ X + X + X + X + X + X
S or D in digit specification of bit device (error code:
+1 is outside the allowable range (error code: K6706)
24 Others – FNC181 to FNC189
+ X + 1
21
22
23
24
25
26
27
28
29
30
595