Autonics KPN Series, Руководство пользователя по связи, Страница: 10 / 26

1 Modbus RTU protocol
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1.2 Read Input Status(Func02–02H)
Read Input ON/OFF status(1X reference) in Slave device.
(1) Query(Master)
Slave Address Function
Starting Address No. of Points Error Check(CRC16)
High Low High Low Low High
1Byte 1Byte 1Byte 1Byte 1Byte 1Byte 1Byte 1Byte
(2) Response(Slave)
Slave Address Function Byte Count Data Data Data
Error Check(CRC16)
Low High
1Byte 1Byte 1Byte 1Byte 1Byte 1Byte 1Byte 1Byte
If read the input status(ON: 1, OFF: 0) of 10EA range 100001(0000 H) to 100010(0009 H)
in the Slave side (Address 17) from the Master side.

Query(Master)
Slave Address Function
Starting Address No. of Points Error Check(CRC16)
High Low High Low Low High
11 H 02 H 00 H 00 H 00 H 0A H ## H ## H
If the values range 100008(0007 H) to 100001(0000 H) on slave side are “ON-ON-OFF-
OFF-ON-ON-OFF-ON”, and the values of 100010(0009 H) to 100009(0008 H) are
respectively “OFF-ON”.

Response(Slave)
Slave Address Function Byte Count
Data
(000008 to
000001)
Data
(000010 to
000009)
Error Check(CRC16)
Low High
11 H 02 H 02 H CD H 01 H ## H ## H
CRC16
CRC16