Rockwell Automation 1747-SCNR ControlNet Scanner Module Reference Manual - Manual (Page 44)

Publication 1747-RM623D-EN-P - June 2006
4-10 Work with the ControlNet Explicit Message Instruction
Control Block Layout
See this table for the control block layout.
SLC 5/0x ControlNet Explicit Message (CEM) Control Block Structure
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 0
Word 0 EN DN ER WS TO Reserved by the 1747-SCNR module
Word 1 Target MAC ID
Word 2 Message Timeout Preset (x1 ms)
Word 3 Complex I0I Size
Word 4 Reserved Service Code
Word 5 Reserved Class
Word 6 Instance
Word 7 Attribute
Word 8 Member
Word 9 Size of Command Data (Words)
Word 10 Request Status - Scanner Status (Scanner Code)
Word 11 Response Status
Word 12 Extended Status Size (Words)
Word 13 Size of response and status (Words)
Word 14 Complex IOI Buffer
(Lets you to manually set IOI)
- - - - - - -
Word 63
Word 64 Error Code Transaction ID
Word 65 Extended Status Debug Word 1
Word 66 Extended Status Debug Word 2