Mitsubishi Electric MELSEC FX3U Programming Manual page 624

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
16-bit conversion mode (while M8161 is OFF)
In this mode, the operation is executed for high-order 8 bits (1 byte) and low-order 8 bits (1 byte) of a device
specified in
S
The operation result is stored to one 16-bit device specified in
M8000
Command
input
FNC188
CRC
Device storing data for
which the CRC value is
generated
Device storing the
generated CRC value
622
.
M8161
S
D
Low-order byte
S
High-order byte
Low-order byte
S +1
High-order byte
Low-order byte
S +2
High-order byte
Low-order byte
S +n/2-1
High-order byte
Low-order byte
D
High-order byte
24.4 FNC188 – CRC / Cyclic Redundancy Check
D
16-bit conversion mode
n
Device
Low-order bits of D100
High-order bits of D100
Low-order bits of D101
High-order bits of D101
Low-order bits of D102
High-order bits of D102
Low-order bits of D0
High-order bits of D0
24 Others – FNC181 to FNC189
.
Example: = D100
S
= D0
D
n = 6
Contents of target data
8 bits
01H
03H
03H
02H
00H
14H
–
–
E4H
41H
16 bits
0301H
0203H
1400H
41E4H