Rockwell Automation 1747-SCNR ControlNet Scanner Module Reference Manual - Manual (Page 29)

Publication 1747-RM623D-EN-P - June 2006
Prepare to Use the ControlNet Scanner 2-9
1747-SCNR M0 File
Only Input and Output data (from Input file, Output file, M0
ControlNet Output data area, and M1 ControlNet Input data area) are
exchanged during scheduled time.
Data transfer to the M0 Local Database is performed using
Unscheduled messaging. Services available to read or write in this
area are Set Attribute Single, Get Attribute Single, Set Member, and Get
Member.
Communicating with
Your Devices The 1747-SCNR scanner supports up to 64 simultaneous scheduled
connections and up to 50 simultaneous unscheduled connections. The
1747-SCNR scanner also supports up to 32 simultaneous incoming
unconnected requests.
I/O Scheduled Data Transfer
Data received from the devices, or input data, is organized by the
scanner and made available to your processor in the Input file or the
M1 ControlNet data area.
Data received from your SLC processor, or output data, is stored
within the Output file or M0 ControlNet data area. The 1747-SCNR
scanner can then send the data to your remote ControlNet devices.
Word
Offsets Word
Size ControlNet
Transfer Mode Contents Description
0-2 3 N/A Reserved Reserved.
3-255 253 Scheduled ControlNet
Output Data Using the RSNetWorx for
ControlNet software, you can map
scheduled output data in this area.
256-699 444 N/A Reserved Reserved.
700-955 256 Unscheduled Local
Database Memory area used by remote
devices to read or write data using
CIP messaging or PLC-5 messaging.
1000-1650 651 Unscheduled CIP Client
Message
Area Memory used to send CIP client
requests. These messages are then
sent by the 1747-SCNR module as
unscheduled messaging.