Ebyte 4440-GPRS User Manual page 24

Wireless Data Transceiver
01 10
Send
Device Functi
ModBus on
address code
01
Rece
Device ModBus
ive
address
Modbus TCP protocol write Socket register:
00 00 00
01 00 37
S
e
Tran
n
Prot
smis
d ocol Leng
sion
ident th
ident
ifier
ifier
00 01 00 00
Transm Protoco
Rece
ission l
ive
identifi identifie
er r
4.4.2 User defineddd register
The user-defined registration package can be ASCII code or hex, the length of hex cannot be
longer than 20 bytes, and the length of ASCII code cannot be longer than 40 bytes. The first register
of the user-defined registration packet is used to store the registration packet type. The value 0x0000
indicates that the registration packet is in hex format, and the value 0x0001 indicates that the
registration packet is in ASCII format. When the value is 0x0001, the registration packet value is
ABCDEFGHIJ, and the corresponding ASCII code value is as below table. The second register of the
user-defined registration packet is used to store the length of the registration packet value. The length
of the registration packet value is 10, which corresponds to 0x0A in hexadecimal. Like the IP registers,
unused register value registers can be filled with "0" or not filled
Copyright ©2012–2018，成都亿佰特电子科技有限公司
00 63 00 18 30
Addre Registe
Bytes
ss r length
10 00 63
Function
Address
code
00
01 10 00 18
63
Fu
Uni
nc Regis
t
tio Addr ter
ide
n ess lengt
ntifi
co h
er
de
00 06 01 10
Unit Functi
Lengt
iden on
h
tifier code
E850-DTU(4440-GPRS) datasheet
00 0D 31 31 36 2E 36 32 2E 34
32 2E 31 39 32 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00
00 00 00 00 7B C7 00 01
Write value
00 18
Register length
00 0D 31 31 36 2E 36 32 2E 34 32 2E
31 39 32 00 00 00 00 00 00 00 00 00
30
00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 7B C7 00 01
Byt
Write value
es
00 63
Address
.
7B F0
CRC
code
30 1D
CRC code
00 18
Register length
24