IO-Link Master with Modbus TCP Interface DataLine 4 Ports IP 65 / IP 66 / IP 67
100
>
Acyclic Command Channel
34449
The following Modbus registers are available for acyclic data transmission:
Register
Contents
Bits 8-15
Bits 0-7
500
Command Request Channel (
→
Request channel
(
0
Command Response Channel (
→
Response channel
(
→ S.
Legend:
[Command Request
Channel]
Area for transmission of command request (fieldbus PLC >>>
IO-Link master)
44 bytes
[Command Response
Channel]
Area for transmission of command response (IO-Link master >>>
fieldbus PLC)
44 bytes
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Request channel
34450
Register
Contents
Bits 8-15
Bits 0-7
500
Port No.
501
Index
502
Subindex
503
Command
User ID
504
Data Length (Number of Bytes)
505
Data (byte 0)
Data (byte 1)
...
...
...
521
Data (byte 32)
Data (byte 33)
Legend:
[Port No.]
Number of the IO-Link port
1 Word
0x0001
Port X01
0x0002
Port X02
...
...
0x0004
Port X04
[Index]
Index of the IO-Link object
1 Word
0x0000...0xFFFF
[Subindex]
Subindex of the IO-Link object
1 Word
0x0000...0xFFFF
[Command]
Command number
1 byte
0x01
Read
0x02
Write
[User ID]
ID to identify the command
1 byte
0x00...0xFF
[Data Length
(Number of Bytes)]
Number of bytes that contain relevant user data (is only
evaluated for Command = 0x02)
1 Word
0x0000
0 bytes
...
...
0x0022
34 bytes
[Data (Byte n)]
user data
n bytes
per byte: 0x00 ... 0xFF
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