Jinan USR IOT Technology Limited IO808 사용자 설명서
USR-IO808-EWR User Manual
Technical Support:
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Jinan USR IOT Technology Limited
www.usriot.com
11
2. Product function
USR-IO808-EWR functional diagram as follow:
Serial port
device(Should
support
Modbus RTU
protocl)
Network
server
Slave mode
Execute Modbus protocol
RS485
Master mode
RTU check
Data transparent
transmission
RTU check
Communication
module
Modbus
TCP/RTU
protocol
conversion
Input
Output
Switch/Button
input
Relay output
Figure 12 Functional diagram
2.1. DI input
2.1.1. Electrical level detection
➢
Register address range: 32~39(0x0020~0x0027)
➢
Supported function code: 02(Read discrete input), 03(Read holding register)
➢
Connection: Default is dry contact input. Short-circuit DI and COM will change input status. If user needs wet
contact input can contact to our sales personnel
contact input can contact to our sales personnel
➢
Electrical level detection: Default status is 0, after short-circuiting DI and COM, status will be 1. Detection
method: 02 function code of Modbus protocol.
method: 02 function code of Modbus protocol.
Example:
Detect input of the first way, send: 11 02 00 20 00 01 BA 90
Short-circuiting will return: 11 02 01 01 64 88
No short-circuiting will return: 11 02 01 00 A5 48
2.1.2. Buttons detection
➢
Register address range: 48~55(0x0030~0x0037)
➢
Supported function code: 03(Read holding register), 04(Read input register)
➢
Connection: Default is dry contact input. Short-circuit DI and COM will change input status. If user needs wet
contact input can contact to our sales personnel
contact input can contact to our sales personnel
➢
Electrical level detection: Default status is 0000, after short-circuiting DI and COM and then releasing, status
will be FF00. Detection method: Read button register value by 03 function code of Modbus protocol. After
reading once button register, status will recover to 0000; after executing conditional control, status will
recover to 0000. too.
will be FF00. Detection method: Read button register value by 03 function code of Modbus protocol. After
reading once button register, status will recover to 0000; after executing conditional control, status will
recover to 0000. too.
Example:
Detect the first way button, send: 11 03 00 30 00 01 86 95