Device Sn Code Reading; Network Function Parameter Validation Command (Ethernet Restart Command) - Ebyte E821-RTU User Manual

Chengdu Ebyte Electronic Technology Co.,Ltd
n identifier
00 01
Receive
Transmissio
n identifier
Note: 1A 00 1C C0 BB FF is the MAC address of the device, the device has a unique MAC address.

4.3.2 Device SN code reading

Modbus RTU protocol read register:
01
Send
Device ModBus
address
01
Receive
Device ModBus
address
Modbus TCP protocol read register:
00 01
Send
Transmissio
n identifier
00 01
Receive Transmissio
n identifier
Note: 19 05 21 14 00 13 55 50 is the device SN code, the devices have different SN codes.

4.3.3 Network function parameter validation command (Ethernet restart command)

Modbus RTU protocol write register:
01
Send Device ModBus
address
01
Receive Device ModBus
address
Modbus TCP protocol write register:
00 01
Send Transmission
identifier
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identifier
00 00 00 09
Protocol
Length
identifier
03
Function
code
03
Function Number of
code
00 00 00 06
Protocol
Length
identifier
00 00 00 0B
Protocol
Length
identifier
06
Function
code
06
Function
code
00 00 00 06
Protocol
Length
identifier
identifier n code
01 03
Unit Functio
Number of bytes
identifier n code
01 65
Start address
08 19 05 21 14 00 13 55 50
Read value
bytes
01 03
Unit Functio
identifier n code
01 03
Unit Functio Number
identifier n code of bytes
00 67
Address
00 67
Address
01 06
Unit Functio
identifier n code
E821-RTU (0400-ETH)User Manual
1A 00 1C C0 BB
06
Read value
00 04
Read number of
CRC check code
registers
CRC check code
01 65
Address Read number
08 19 05 21 14 00 13 55 50
Read value
00 01
Write value CRC check code
00 01
Write value CRC check code
00 67
Address Write value
FF
55 EA
F9 AA
00 04
F9 D5
F9 D5
00 01
19 19