02(0 X 02) Read The Status Of The Input (Read Di S ) - ICPDAS ECAT-2610 User Manual

EtherCAT to Modbus RTU Gateway
02(0x02) Read the Status of the Input (Read DIs)
This function code is used to read the current digital input value.
[Request]
Byte Description
00 Net ID (Station Number)
01 Function Code
02-03 Starting DI Address
04-05
Number of Points (Channels)
[Response]
Byte Description
00
Net ID (Station Number)
01 Function Code
02 Byte Count
03
Data
[Error Response]
Byte Description
00 Net ID (Station Number)
01
Function Code
02 Exception Code
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Size
1 Byte 1 to 247
1 Byte 0x02
Refer to the Modbus address depends on your
slave device for more details.
2 Bytes
Byte 02 = high byte
Byte 03 = low byte
Byte 04 = high byte
2 Bytes
Byte 05 = low byte
Size
1 Byte 1 to 247
1 Byte 0x02
Byte Count of Response
1 Byte
( n =(Points+7)/8 )
n= 1; Byte 03 = data bit 7 to 0
n= 2; Byte 04 = data bit 15 to 8
n Bytes
.......
n= m; Byte m+2 = data bit (8m-1) to 8(m-1)
Size
1 Byte 1 to 247
1 Byte 0x82
Refer to the Modbus Standard Specifications for
1 Byte
more details
Value
Value
Value
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