Ebyte E851-RTU Series User Manual page 27

Chengdu Ebyte Electronic Technology Co., Ltd.
Types of
00 00
Modbus RTU protocol write register package register:
01 10
send
Device functi
ModBus on
address code
take 01
over Device ModBus address
Modbus TCP protocol write register package register:
00 01 00 00 00 33
sen
d Trans
Protoc
missio length
ol ID
n ID
00 01
take
Transmission
over
ID
4.4.4 Heartbeat packet time
The heartbeat packet time setting range is 0-65535 seconds. When the heartbeat packet time is set to 0, the heartbeat packet is
turned off. Set the heartbeat packet duration to 5s as follows.
Modbus RTU protocol write heartbeat packet time register:
01
send Device ModBus
address
01
take over
Device ModBus address
Modbus TCP protocol Modbus RTU protocol write heartbeat packet time register:
00 01
send
Transmission
Copyright © 2012, Chengdu Ebyte Electronic Technology Co., Ltd.
length
00 0A
00 92 00 16 2C
register
address Bytes
length
10
function code
00
01 10
92
functi
Unit addr
on
ID ess
code
00 00 00 06
Protocol ID length
06
function code
06
function code
00 00 00 06
Protocol length
Registry package value
00 01 02 03 04 05 06 07 08 09
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 00
00 00 00 0A 00 01 02 03 04 05 06 07 08 09 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 00
write value
00 92
address
00 00 00 0A 00 01 02 03 04 05 06 07 08 09 00 00
00 16 2C 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
register Byte
length s
01 10
function
Unit ID
code
00 A8
address
00 A8
address
01 06
Unit ID function
E851-RTU(4440-ETH) User Manual
00 16
register length CRC check code
00 00 00 00 00 00 00 00 00 00 00
write value
00 92
address register length
00 05
write value CRC check code
00 05
write value CRC check code
00 A8
address write value
52 9E
CRC
check
code
E0 2A
00 16
C8 29
C8 29
00 05
27