Io Features - Ebyte E851-RTU Series User Manual

Chengdu Ebyte Electronic Technology Co., Ltd.
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4.2.4 Analog AI range setting
When the register 0x40084 (0x0053) value is 0, the differential analog input range is 0 -- 20mA;
When the register 0x40084 (0x0053) value is 1, the differential analog input range is 4 -- 20mA;

4.3 IO Features

4.3.1 Pulse count and count reset
The pulse count will not be saved after power off, and the pulse level maintenance time must be greater than 10ms to be valid.
The switch value input changes from the open state to the closed state and maintains the closed state for more than 10ms, and then
changes to the open state to complete a pulse count.
4.3.1.1 Read pulse count value
Function code: 03, read holding register
Address range: 40049 (0x0030)~40052 (0x0033)
Description: The maximum value of pulse count is 65535
example:
DI1 has currently detected 16 pulses, DI2 has currently detected 3 pulses, read the count values of DI1 and DI2 digital inputs,
Modbus RTU protocol read pulse count value:
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send
Device ModBus
address
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Device ModBus address
Modbus TCP protocol read pulse count value:
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Transmissio
n ID
Copyright © 2012, Chengdu Ebyte Electronic Technology Co., Ltd.
00 00 00 05
Protocol
length
ID
03
function code
03
function code
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Protocol
length
ID
00 00 00 07
Protocol ID length
01 04
function returns the number of
Unit ID
code
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initial address
04 00 10
returns the
number of DI1 count value
bytes
01 03
function
Unit ID
code
01 03
returns the
function
Unit ID number of
code
E851-RTU(4440-ETH) User Manual
02
Differential analog
bytes
00 02
Number of reads CRC check code
00 03
DI2 count value CRC check code
00 30
initial address Number of reads
04 00 10
DI1 count
value
bytes
26DA
input value
C4 04
BB F7
00 02
00 03
DI2 count
value
22