7 Communication Using MC Protocol
78
FX3U-ENET-ADP User's Manual
7.5 Device Memory Read/Write
<Note>
C200 to C255 (Current Values) Batch Write
Since C200 to C255 are 32 bit devices, the device points should be specified with twice as many points as are
actually written.
Also, make sure that the device points are specified by an even number.
If they are specified by an odd number, the batch write cannot be performed. (Error code 57H will be stored)
Example) When 32 points are written at one access from C220 to C251 in the PLC on which the Ethernet
adapter is mounted.
1) Communication in binary code
03
H
FF
H
L
0A
H
H
00
H
83
H
00
H
43
H
4E
H
DC
H
00
H
00
H
00
H
40
H
00
H
40
H
01
H
B9
H
02
H
12345678=00BC614EH 45678912=02B90140H
CN220
4E
H
61
H
BC
H
00
H
L - H L - HL - H L - H
L - - - - H
(2 bytes x 2) x 32 = 128 bytes
(Data name)
External
device side
(Example)
(Data name)
PLC side
(Example)
Complete code
Subheader
PC No.
Monitoring
timer
Head device
Number of
device points
Subheader
Low
16bit
High
16bit
Low
16bit
High
16bit
Head data Last data
32 points x 2 = 64word
*
*
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