8.4.3 SEND (MODBUS Master: Function Code Specification)
■
Ladder diagram
(Note 1) The above figure shows the case that S1=U0 (CPU unit with built-in SCU) and S2=U1 (port number 1)
are specified by the UNITSEL instruction.
■
Available operation units (●: Available)
Operatio
n unit
bit US SS UL SL SF DF
i ● ●
■
List of operands
Items Settings Setting range
S Starting address of the sender data area -
n Amount of sent data
1 to 127 words
1 to 2040 bits
D1
MODBUS command to be used, and the partner station number
Higher byte MODBUS function code (two hexadecimal digits) H5, H6, HF, H10
Lower byte Partner station number (two hexadecimal digits) H0 to HFF (0 to 255)
D2 MODBUS starting address of the receiver data area of the partner unit H0 to HFFFF (0 to 65535)
D3
Starting address of the device area of the master unit that stores the
execution result code (1 word)
-
■
Available word devices (●: Available)
Operan
d
16-Bit device:
32-Bit
device:
Integer
Real
numbe
r
St
rin
g
Index
modifie
r
W
X
W
Y
W
R
W
L
W
S
S
D
D
T
L
D
U
M
WI
W
O
TS
C
S
TE
C
E
IX K Ｕ H SF
D
F
" "
S ● ● ● ● ● ● ●
n ● ● ● ● ● ● ● ● ●
D1 ● ● ● ● ● ● ● ● ●
8.4 MODBUS RTU Master Communication (SEND)
WUME-FP7COM-07 8-31
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