V02.00 | 2019/10
93
IO-Link Parameter Object (VSC 103)
The IO-Link Parameter Object enables the acyclic transfer of parameter data between the IO-
Link master and the IO-Link device.
Instance 1 of the object addresses the IO-Link master
The instance attribute numbers address the IO-Link port at the IO-Link master or the port 0
functions of the IO-Link master.
n 1…n: IO-Link port at IO-Link master, n = number of IO-Link ports at IO-Link master
n 128: Port-0 functions of the IO-Link master
Instance attributes
Common services
Service code Class Instance Service name
Dec. Hex.
14 0x0E Yes No Get_Attribute_Single
Returns the content of a specified attribute.
75 0x4B No yes Read_ISDU
The service reads parameters from the connected IO-
Link device.
76 0x4C No yes Write_ISDU
The service writes parameters from the connected IO-
Link device.
Read_ISDU - Request
Data Value/content Description
Class 0x67 IO-Link Parameter Object
Instance 0x01 Addressing the IO-Link master
Instance attribute 0x01…n, 128 IO-Link port number, or 128 for Port-0 functions
Service code 0x4B Read_ISDU
Data Request parameters for the ISDU Read Service
Name Data type Description
Data byte 0 Index (LSB) UINT LSB from index of the IO-Link ISDU object
acc. to IODD
Data byte 1 Index (MSB) UINT MSB from index of the IO-Link ISDU object
acc. to IODD
Data byte 2 Sub index USINT Sub index from the IO-Link ISDU object
acc. to IODD
Read_ISDU – Response
n CIP Service Response, General-Status ≠ 0 Ò error-free access
structure of the response:
Name Data type Description
ISDU data Array of Byte Read data, max. 232 byte
n CIP Service Response, General-Status ≠ 0 Ò access error
structure of the response:
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