Rockwell Automation 1747-SCNR ControlNet Scanner Module Reference Manual - Manual (Page 72)

Publication 1747-RM623D-EN-P - June 2006
C-12 CIP Client Management
The 1747-SCNR at MAC ID 11 wrote 32 words into the input data file
of 1747-SCNR at MAC ID 8.
Send a Set
Member Request This process is illustrated in the following example. The steps in the
What’s Happening box correspond to the steps in the illustrations
following the What’s Happening box.
1 . The CIP message control image is updated on a regular base.
2. You want to send a Set Member to Data Attribute (Attribute
number 3) of assembly instance 7 (Local Database at words
M0:701 to M0:956). The CIP message control area and command
data are initialized in an internal data file. The command data is
copied in M0 first, then the command word is cleared and, as a
last step, the message control area is copied into M0 with the EN
bit set to what will send the message on the wire.
3. Request and response are exchanged on the wire.
4. When the bit DN is set without an error or timeout, nlatch the
DN bit. No response data is expected in case of a successful
response.
The response is available in an SLC internal data file.
See the following list for assembly object instance numbers supported by the
Get and Set Attribute Single services on Data attribute.
Instance 5 : Output file words 1 to 31
Instance 6 : Input file words 1 to 31
Instance 7 : M0, ControlNet Data area words 0 to 1650
Instance 8 : M1, ControlNet Data area words 0 to 607
IMPORTANT
The 1747-SCNR module at MAC ID 8 must be in program
mode to write to the input data file.