Allen-Bradley RightSight 42EF Series User Manual page 72

Message Structure and Configuration Example Configuration Examples
Service Code (Hex
4B
4C
4D
4E
68
Service Code
The table that is shown is used to determine the service code that is needed for a
specific Message Instruction.
Need in Implementation
Class Instance
Required Required
N/A Required
Required Required
N/A Required
Source Length: from Data Structure Tables
The tables below can be used to determine the source length that is based on the
service code that is used and the number of bytes being written.
Read Subindex (4B)
Message Data Format:
Byte 0
Subindex Number
Source Length= 2 bytes
Read Subindex (4C)
Message Data Format:
Byte 0
Subindex Number
Source Length= 2 bytes + Number of bytes of data being written
Read Subindex (4D)
Message Data Format:
Byte 0
Channel Number = 1 byte
Source Length= 1 byte
Write Index (4E)
Message Data Format:
Byte 0
Channel Number
Source Length= 1 byte + Number of bytes of data being written
Rockwell Automation Publication 42EF-UM001A-EN-P - September 2015
Service Name
Read Subindex Reads a parameter value from the IO-Link device
Write Subindex Writes a parameter value from the IO-Link device
Reads an entire index (all parameters within an index)
Read Subindex
from the IO-Link device (uses subindex 0)
Writes an entire index (all parameters within an index)
Write Subindex
from the IO-Link device (uses subindex 0)
Byte 1
Channel Number
Byte 1 Byte 2
Channel Number Data 0
Byte 1 Byte 2
Data 0 Data 1
Description of Service
Byte 3
Data 1
Byte 3
Data 3