Mitsubishi FX Series - MODBUSTCP Communications

Use the manual Beichen Automation BCNET-FX-S Ethernet communication processor
6. MODBUSTCP communications
The BCNET-FX-S module integrates with the MODBUSTCP communication server internally,
so the MODBUSTCP client, for example, is supported
MODBUSTCP configuration software, OPC Server, PLC and the realization of ModbusTCP client high-
level language development
Can directly access the Mitsubishi FX Series PLC Internal Data Area, Modbus protocol
address in the BCNet internal
Has been mapped to the default FX Series PLC address area, the implementation of
the function numbers include: FC1, FC2, FC3, FC5,
FC6 and FC16.
MODBUSTCP protocol frame format:
Busi
ness
Busi
ness
Agre
emen
t
The
subject
matter
of the
agreem
ent
Length
Field (high
The
length
field
From
the
statio
n
floor
功
Data
address
Data
Instru
ction
s
Instru
ctions
Proc
essin
g
Proc
essin
g
Ident
ificat
ion
Symbo
l
Bytes)
(low
byte)
址
能
(high
characte
r
Addres
s (low
charact
ers
Num
ber
(high
Num
ber
(low
Ident
ificat
ion
Ident
ificat
ion
符
号
Section)
Section
)
Bytes
)
Bytes
)
符
符
0x0
0x0
0x0
0x0
0x0
The
following
bytes
数
Address mapping table
Modbus
slave station
FX Series
PLC inside
Data
Rentenfor
mel
(Germany)
Function
number
Maximum
number of
instructions
址
Part of the
software
componen
ts
Typ
e
000001
Output coil: Y
0ー
YM = 000001 +
Dec (m)
①
005001
Special:
M8000
M8M = 005001 +
m
②
006001
Timer coil: T
0ー
位
TM = 006001 +
m
FC1(reading
coil)
FC1:2000
FC5(write
coil)
FC 5:1
007001
Counter coil:
C 0
CM = 007001 +
m
010001
Coil: m0ー
MM = 010001 +
m
030001ー
Coil: S 0
SM = 030001 +
m