IDEC FT1A Series User Manual page 271

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
•
Internal Relay (M)
Bit +0
Bit +1
Bit +2
Master Device Address: Data Register
•
Data Register (D)
Word +0
Word +1
Word +2
Word Data at Slaves (Function Codes 03, 04, 06, and 16)
Master Device Address: Internal Relay
•
Internal Relay (M)
Bit +0
Bit +16
Bit +32
Master Device Address: Data Register
•
r
Data Register (D)
Word +0
Word +1
Word +2
Master
. . .
b15 b14 b2
. . .
b15 b14 b2
. . .
b15 b14 b2
Master
. . .
+15 +14 +2
. . .
+31 +30 +18 +17 +16
. . .
+47 +46 +34 +33 +32
Master
. . .
b15 b14 b2
. . .
b15 b14 b2
. . .
b15 b14 b2
Master
S AXIS P
MART
Modbus Address
Bit +0
Bit +1
Bit +2
Slave
b1 b0
b1 b0
b1 b0
+1 +0
b1 b0
b1 b0
b1 b0
/L U ' M FT9Y-B1378
RO ITE SER S ANUAL
11: M
ODBUS
Modbus Address
Bit +0
Bit +1
Bit +2
Slave
Modbus Address
Word +0
Word +1
Word +2
Slave
Modbus Address
Word +0
Word +1
Word +2
Slave
C
OMMUNICATION
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