Rockwell Automation 1769-SM1 Compact I/O to DPI/SCANport Module - Manual (Page 148)

D-4 SCANport Objects
Class Code
The SCANport Pass-Through Parameter Object lets you perform a
scattered read or write.
Class Attributes
None
Instance Attributes
None
Common Services
None
Object-Specific Services
The table below lists the parameters for the Scattered_Parameter_Value_
Read and Scattered_Parameter_Value_Write object specific services:
Important: The STRUCT may repeat up to 55 times in a single
message.
SCANport Pass-Through Parameter Object
Hexadecimal Decimal
0x93
147
Service Code Service Name
0x32
Scattered_Parameter_Value_Read
(1)
(1)
The instance and attribute are ignored for these services.
0x34 Scattered_Parameter_Value_Write
(1)
Name Data Type Description
Scattered Parameters STRUCT of
Parameter Number WORD Parameter to read or write
Parameter Value WORD Parameter value to write (zero when reading)