Chengdu Ebyte Electronic Technology Co.,Ltd
E851-RTU(4440-ETH) User Manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co.,Ltd
28
Modbus RTU Write Register:
Transmit
01
10
00 92
00 16
2C
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
52 9E
Device
ModBus
address
function
code
address
Register
length
Bytes
Write value
CRC
check code
Receive
01
10
00 92
00 16
E0 2A
Device ModBus address
function code
address
Register length
CRC check code
Modbus TCP Write Register:
Transmit
00 01
00 00
00 33
01
10
00 92
00 16
2C
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
Transmission
identifier
Protocol
identifier
length
element
ID
Function
code
address
Register
Length
Bytes
Write value
Receive
00 01
00 00
00 06
01
10
00 92
00 16
Transmission
identifier
Protocol
identifier
length
element ID
Function
code
address
Register length
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 closed. Set the heartbeat packet length to 5s as follows.
Modbus RTU protocol write heartbeat packet time register:
Transmit
01
06
00 A8
00 05
C8 29
Device ModBus
address
function code
address
Write value
CRC
check code
