Comtrol IO-Link Master EIP-4 - Manual (Page 44)

44 - Chapter 3. EtherNet/IP CIP Object Definitions IO-Link Master EtherNet/IP Reference Manual: 2000589 Rev. A
Object Specific Services
3.4.4. Object Specific Services
The following table shows the Object Specific Services for the ISDU Read/Write Object Definition (74 hex).
The Blocking ISDU Request service allows one message instruction to both send an ISDU request and receive
the response. Using this service causes the message to be active for several seconds.
3.4.5. Instance Attribute Definitions
The following attributes provide access to the ISDU blocks on the IO-Link devices.
3.4.5.1. Attribute 1-ISDU Read/Write Response (Non-Blocking only)
Get Attribute Single messages returns the ISDU response for a specific port through the IO-Link Master. The
response may need to be read multiple times until a response of Success, Failure, or Timed Out has been
received.
3.4.5.2. Attribute 2-ISDU Read/Write Request (Non-blocking only)
Set Attribute Single messages can send read/write type ISDU requests to the IO-Link devices via the IO-Link
Master. The ISDU request message need be sent only once for each ISDU read/write request.
Service Code Implemented in Class Implemented in Instance Service Name
4B hex No Yes Blocking ISDU Request