Rockwell Automation 1747-SCNR ControlNet Scanner Module Reference Manual - Manual (Page 64)

Publication 1747-RM623D-EN-P - June 2006
C-4 CIP Client Management
Send a Get Attribute All
Request to Node 14 Identity
Object In this example, a 1747-SCNR module with MAC ID 11 is located
in slot 1 of the SLC rack. It sends a Get Attribute All request to
the Identity object of a remote 1794-ACNR15 Flex I/O device at
MAC ID 14 on the ControlNet network. This request is triggered
by the ladder program using the CIP Client feature provided by
the 1747-SCNR module.
This process is illustrated in the following example. The steps in
the procedure correspond to the steps in the illustrations.
1 . The CIP message control image is updated on a regular
basis.
2. The message and its data are prepared in the SLC N7 file to
be copied in M0 using a single COP (copy) instruction. To
send the message, first clear the CIP message control
image area in the SLC 500 N7 data file. No command data
is needed for a Get Attribute Single request. Initialize the
local CIP control words and data size. Set the EN bit and
then copy the control data.
3. Request and response are exchanged on the wire.
4. When the DN bit is set without errors or timeout, copy the
response data into an intermediate file and unlatch the DN
bit.
The response is available in an SLC internal data file.