97
Command description: This command is used to set the instrument interface to English.
Command Syntax: :SYSTem:LANGuage?
Shorthand for command: :SYST:LANG?
Command description: This command is used to query the language used by the instrument.
6.4
MODBUS Communication Commands
MODBUS is a serial communication protocol published by Modicon for communication using programmable
logic controllers (PLCs). MODBUS has become the industry standard for communication protocols in the
industrial sector and is now the usual connection between industrial electronic devices.
6.4.1
MODBUS Protocol
6.4.1.1
Description of Writing Instruction
Send Format
Return Format
1)
Sending Address
The sending address refers to the local address of the instrument, which can be set in the parameter bus
interface of the communication setting interface of the instrument. The value ranges from 1 to 31.
2)
Function Code
The write command function code is: 0x0F.
3)
High Address
The address is the storage address of the data in the instrument, and the high address is the high eight bits
of the address.
4)
Low Address
The address is the storage address of the data in the instrument, and the low address is the low eight bits of
the address.
0
1
2
3
4
5
6
7
8
9
10
11
12
In
str
u
m
en
t
ad
d
re
ss
Fu
n
cti
o
n
co
d
e
H
ig
h
ad
d
re
ss
Lo
w
a
d
d
re
ss
H
ig
h
b
yt
es
Lo
w
b
yt
es
N
u
mb
e
r o
f
d
at
a
Da
ta b
yt
e 1
Da
ta b
yt
e 2
……
Da
ta b
yt
e
n
CR
C L
o
w
CR
C H
ig
h
0
1
2
3
4
5
6
7
Instrument
address
Function
code
High address
Low address
High bytes
Low bytes
CRC Low
CRC High
Summary of Contents for TH7105
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