S
MART
AXIS P
RO
/ L
ITE
U
SER
'
S
M
ANUAL
FT9Y-B1378
11-7
11: M
ODBUS
C
OMMUNICATION
Processing Requests
The data for Modbus communication are processed between the master and slaves as shown below.
Bit Data at Slaves (Function Codes 01, 02, 05, and 15)
Master Device Address: Internal Relay
Master Device Address: Data Register
Word Data at Slaves (Function Codes 03, 04, 06, and 16)
Master Device Address: Internal Relay
Master Device Address: Data Register
r
Bit +0
Master
Bit +1
Bit +2
Internal Relay (M)
Bit +0
Slave
Bit +1
Bit +2
Modbus Address
Word +0
b15
Master
Word +1
Word +2
Data Register (D)
b14 . . .
b1
b0
Bit +0
Slave
Bit +1
Bit +2
Modbus Address
b2
b15 b14 . . .
b1
b0
b2
b15 b14 . . .
b1
b0
b2
Bit +0
+15
Master
Bit +16
Bit +32
Internal Relay (M)
+14 . . .
+1
+0
Word +0
Slave
Word +1
Word +2
Modbus Address
+2
+31 +30 . . .
+17 +16
+18
+47 +46 . . .
+33 +32
+34
Word +0
b15
Master
Word +1
Word +2
Data Register (D)
b14 . . .
b1
b0
Word +0
Slave
Word +1
Word +2
Modbus Address
b2
b15 b14 . . .
b1
b0
b2
b15 b14 . . .
b1
b0
b2
Содержание SmartAXIS FT9Z-1A01
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