Rockwell Automation 1747-SCNR ControlNet Scanner Module Reference Manual - Manual (Page 96)

Publication 1747-RM623D-EN-P - June 2006
E-18 Application Examples
2. Click OK.
3. Click YES.
Your network configuration information are now written to the
network keeper.
The display on the front of your 1747-SCNR scanner should
show an image of a full glass next to the word I/O. This
indicates that all configured connections have been successfully
downloaded to the scanner. In addition, the A and OK LEDs
should be solid green and the B LED should be off, unless you
are using the redundant media option, which is not being used
in this example. The 1747-ACNR15 module should be displaying
that it is active (ACTV) and its LEDs should be solid green for A
and OK and the B LED should be off.
Creating a Ladder Program
The final step is to write a ladder program for the SLC processor,
including configuring the 1747-SCNR scanner for slot 3 of the
processor’s chassis.
1 . After downloading the program to your processor, place it into
the Run mode.
Your program should now be able to read data from the
1746-IA16 in word I:3.3 and write to the 1746-OB16 in word
O:3.2. The analog input data will reside in words M1:3.3 and
M1:3.4, while the analog output data must be placed in words
M0:3.3 and M0:3.4.
Note that your ladder program should also contain an
unconditional rung with an OTE instruction addressed to the
1747-SCNR scanner’s Run/Idle bit, O:3.0/10 for this example.
When the SLC processor is placed into the Run mode, this rung
will set the 1747-SCNR scanner’s Run/Idle bit and place the
scanner into the Run mode as well. The scanner will begin
executing the configured connections when the Run/Idle bit is
set.
Example 3: Configure the
1747-SCNR Scanner with
the 1746-NI8 Analog
Input Module The following example discusses how to configure the 1747-SCNR
scanner with the 17 46-NI8 analog input module.