Rockwell Automation 1747-BSN Backup Scanner Module - Manual (Page 41)

Publication 1747-UM010B-EN-P - September 2003
Quick Start for Experienced Users 2-3
4. Connect all RIO/DH+ link devices. Ensure that you:
•
Daisy chain each RIO/DH+ link device.
•
Connect the appropriate termination resistors on each end of
the link.
5. Configure the system.
Set up your system I/O configuration for the particular slot in
which you installed the scanner (slot 1 in this example). If the
1747-BSN is not yet listed in your version of programming
software, select “Other” and type in a module ID code of 13609.
6. Enter the number of scanned words.
Enter the number of Scanned Input and Output Words using the
Specialty I/O and Advanced Setup menus. The default value is
32 I/O words. You can specify less than 32 and reduce the
processor scan time by transferring only the part of the input
and output image that your application requires. If you have
configured the BSN for DH+ mode, you may configure the
scanned I/O words for 1. It is important that you do not set
either of these values to 0. If you do, the BSN will not work
correctly.
7. Set the M0-M1 and G file sizes.
Using the Specialty I/O Configuration menu, set the M1 and M0
file sizes to at least 32 words (48 words if using complementary
I/O). 32 words is the minimum required for operation. If you do
not set the M1 and M0 file sizes to at least 32 words, the
programming device does not allow you to access the M files in
the SLC control program. The maximum M file sizes are 5548
words for complete capability. There is no penalty to set the M
file lengths to this maximum.
Set the G file size to 3 (5 if using complementary I/O) using the
Specialty I/O Configuration menu.
Write your ladder code to address discrete I/O from the 32 input
and output image words and the M files for control and status of
the RIO network as well as block transfer and the HSSL, if
needed. Refer to Appendix B, M0-M1 Files and G Files before
completing this selection.