Ebyte E851-RTU User Manual

Chengdu Ebyte Electronic Technology Co.,Ltd E851-RTU(4440-ETH) User Manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co.,Ltd
19
Receive
01
02
01
05
61 8B
Device ModBus
address
Function code
Return bytes
Switch Input Value
CRC check code
Modbus TCP protocol reads switch input:
Transmit
00 01
00 00
00 06
01
02
00 10
00 04
Transmission
identifier
Protocol
identifier
length
element ID
Function
code
Switch start address
Read the quantity
of switches
Receive
00 01
00 00
00 04
01
02
01
05
Transmission
identifier
Protocol
identifier
length
element ID
Function
code
Return bytes
Switch Input Value
4.2.3. Read analog AI input
Function code: 03, read holding register; 04, read input register
Address range: 30017 (0x0010) ~30020 (0x0013)
Note: The input unit of differential analogue is uA.
Example:
Function code 0x03, read AI1 input, assuming AI1 input is 9946uA, the corresponding value should be 0x0x26DA
The Modbus RTU protocol reads the differential analog input:
Transmit
01
03
00 10
00 01
85 CF
Device ModBus
address
Function code
Analog start address
Read quantity
CRC check code
Receive
01
03
02
26 DA
23 BF
Device ModBus
address
Function code
Return bytes
Input value of
differential analogue
CRC check code

Ebyte E851-RTU Specifications

General

Brand	Ebyte
Model	E851-RTU
Category	Modem
Language	English