IFM Electronic AL1122 - Page 78

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ifm Operating Instructions IO-Link Master with EtherNet/IP interface StandardLine 8 Ports IP 65 / IP 67 (AL1122) 2017-05-31
Appendix
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Request channel
17657
Byte
Content
4
Port no. (LSB)
5
Port no. (MSB)
6
Index (LSB)
7
Index (MSB)
8
Sub-index (LSB)
9
Sub-index (MSB)
10
Trigger
Command
11
Length of the user data (number of bytes)
12
Data (byte 0)
13
Data (byte 1)
..
...
43
Data (byte 31)
44
reserved
45
reserved
Legend:
Port no. (LSB)
Number of the IO-Link port (low byte)
 Port no. = 0xXXYY
 Port no. (LSB) = 0xYY
8 bits
0x01 = port X01
0x02 = port X02
...
0x08 = port X08
Port no. (MSB)
Number of the IO-Link port (high byte)
 Port no. = 0xXXYY
 Port no. (MSB) = 0xXX
8 bits
0x00
Index (LSB)
Index of the IO-Link object (low byte)
 Index = 0xXXYY
 Index (LSB) = 0xYY
8 bits
0x00...0xFF
Index (MSB)
Index of the IO-Link object (high byte)
 Index = 0xXXYY
 Index (MSB) = 0xXX
8 bits
0x00...0xFF
Sub-index (LSB)
Sub-index of the IO-Link object (low byte)
 Sub-index = 0xXXYY
 Sub-index (LSB) = 0xYY
8 bits
0x00...0xFF
Sub-index
(MSB)
Sub-index of the IO-Link object (high byte)
 Sub-index = 0xXXYY
 Sub-index (MSB) = 0xXX
8 bits
0x00...0xFF
Trigger
Control of the command execution
1 bit
0x0 = do not process command
0x1 = execute command
Command
Command number
7 bits
0x01 = read
0x02 = write
Length of the
user data
Number of bytes that contain relevant user data
8 bits
0x00 = 0 bytes
...
0x20 = 32 bytes
Data (byte n)
User data
8 bits
0x00...0xFF
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