Autonics krn100 series, Руководство пользователя

Страница: 21 / 82

2 Modbus TCP protocol
© Copyright Reserved Autonics Co., Ltd. 21
2.2 Read Input Status(Func02–02H)
Reads the input (1X reference) ON/OFF status in the Slave device.
(1)
Query(Master)
MBAP Header
Function
(Command) Starting Address No. of Points(Number of data)
High Low High Low
7Byte 1Byte 1Byte 1Byte 1Byte 1Byte
(2)
Response(Slave)
MBAP Header
Function
(Command)
Byte Count
(Number of
data byte)
Data Data Data
7Byte 1Byte 1Byte 1Byte 1Byte 1Byte
The below example is to read the input status (ON: 1, OFF: 0) of 10EA within 100001(0000 H) to
100010(0009 H) on the Slave from the Master.

Query(Master)
MBAP Header
Function
(Command
) Starting Address No. of Points(Number of data)
High Low High Low
00 07 00 00 00 06 01H 02 H 00 H 00 H 00 H 0A H
The below example is when 100008(0007 H) to 100001(0000 H) value on the Slave is “ON-ON-
OFF-OFF-ON-ON-OFF-ON” and 100010(0009 H) to 100009(0008 H) value is “OFF-ON”.

Response(Slave)
MBAP Header
Function
(Command)
Byte Count
(Number of data
byte)
Data
(000008 to 000001)
Data
(000010 to 000009)
00 07 00 00 00 05 01H 02 H 02 H CD H 01 H