7 Communication Using MC Protocol
80
FX3U-ENET-ADP User's Manual
7.5 Device Memory Read/Write
7.5.7 Test in word units (random write) (command: 05)
The examples shown in this section explain the command/response format when writing data by designating
word device memories or bit device memories (16 point units) arbitrarily. These examples are not applicable
for writing the current values of C200 to C255 (32-bit devices).
For more details on the order and content of data items of the areas marked by " * " shown in the control
procedure diagram, refer to Subsection 7.3.2.
[Control procedure]
Specifying Y20 to Y37 to on/off, R26 to "1234H," and the current value of C18 to "50H" at the PLC on which
the Ethernet adapter is loaded.
1) Communication in binary code
Current value of CN18
50H
1234H
Y30Y37Y20Y27
0010100101111011
Y20 R26
1....ON
0....OFF
05
H
FF
H
0A
H
03
H
00
H
80
H
00
H
00
H
00
H
20
H
59
H
29
H
7B
H
1A
H
00
H
00
H
00
H
20
H
52
H
34
H
12
H
12
H
00
H
00
H
00
H
4E
H
43
H
50
H
00
H
00
H
85
H
00
H
LL-HLH---HL-HL--- HL- HL--- H
(Data name)
External device
side
(Example)
(Data name)
PLC side
(Example)
Subheader
PC No.
Number of device points
Monitoring
timer
Designated device
Subheader
Complete code
to to
Designated device Designated device
Device data
(ON/OFF designation)
Device data
Device data
*
*
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