Rockwell Automation 1203-CN1 ControlNet Communications Module 1203-CN1 - Manual (Page 115)

Publication 1203-5.13 – February, 2002
ControlNet Objects: Class Code 0x99 — SCANport Pass-Through Link Object D-29
Class Code 0x99 — SCANport
Pass-Through Link Object The SCANport Pass-Through Link Object lets you perform a
scattered read or write of a number of links or a single read or write of
a link.
Class Attributes
Instance Attributes ➀
Common Services
Object-Specific Services
The table below lists parameters for Scattered_Link_Reference_Read
and Scattered_Link_Reference_Write object-specific services.
Attribute ID Access Rule Name Data Type Description
0 Set Link Command BYTE 1 = Clear all links.
1 Get
NVS Link Diagnostic
Value WORD Checksum.
Attribute ID Access Rule Name Data Type Description
0 Set
Parameter Link
Reference
➁
WORD
➀
An instance in this class is the number of a parameter that is to get its value from another parameter.
➁
The Parameter Link Reference value is the number of the parameter whose value is to be transferred.
Service Code
Implemented for:
Service Name
Class Instance
0x0E Yes Yes Get_Attribute_Single
0x10 Yes Yes Set_Attribute_Single
Service Code
Implemented for:
Service Name
Class Instance
0x32 Yes No
Scattered_Link_
Reference_Value_Read
➀
0x34 Yes No
Scattered_Link_
Reference_Value_Write
➀
➀
Must be directed to Attribute 0, Instance 0.
Name Data Type Description
Scattered Link Read/
Write STRUCT of
Parameter Number WORD Parameter Link Reference to read or write.
Parameter Link
Reference WORD Link Reference value to write (zero when reading).
Important: The STRUCT may repeat up to 124 times in a single message.