Basic Functions Of Io; Digital Do Output - Ebyte E831-RTU(6060-4G) Manual

Table of Contents

Chengdu Ebyte Electronic Technology Co.,Ltd.

This function of the host mode can realize the device cascading function and the data transmission between the 485 bus

and the network.

4.2 Basic functions of IO

Read digital DO output

Function code: 01, read coil status

Address range: 00017(0x0010)~00022(0x0015)

Description: The equipment relay is passively output. When the coil is not energized, the relay NC port and COM port

are normally closed, and the NO port and COM port are normally open, and the value is 0; when the coil is energized, the

phenomenon is opposite, the relay NC port and COM port are disconnected Open, NO port and COM port are closed, the

value is 1. Query the relay status by command.

example:

Read the 6-channel switching output status, assuming the return value is 03, corresponding to the binary bit 0000 0011,

the lower six bits represent the switching output status, which are DO6, DO5, DO4, DO3, DO2, DO1 in sequence.

Modbus RTU protocol to read digital output:

send

Device ModBus address

receive

00 10

function

Switch start address

code

E78-470LN22S User Manual

00 06

Number of read

CRC

switches

code

BD CD

check

11 89

Table of Contents