Slc/Scanner Configuration - Allen-Bradley 1747-SN User Manual

4–32 Scanner Configuration and Programming
SLC/Scanner
Configuration
Publication 1747 6.6 - July 1996
Your SLC processor can be programmed with an HHT (Hand-Held
Terminal) or APS (Advanced Programming Software). Although the
configuration steps are similar, they are not identical. Therefore, the
following basic steps are provided. For specific instructions, refer to
the user manual included with your programming device. For more
information on M and G files, refer to appendix B.
1. Locate an open slot in your SLC chassis. Remember that you
must use an SLC 5/02 or later processor.
2. Assign the scanner to a physical slot in the SLC processor's
chassis by selecting Scanner from the list. If the scanner
selection is not available, select OTHER from the I/O
Configuration Screen and enter the Code ID number: 13608.
3. 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.
Important:
Do not set either of these values to 0. If you do,
the scanner will not work correctly.
4. Using the Specialty I/O Configuration menu, set the M1 and M0
file sizes to 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 will not allow you to access the M files in
the SLC control program.
If you are using the block transfer (BT) function, you should set
the M1 and M0 file sizes to 3,300. Refer to chapter 5 before
completing this selection.
5. Set the G file size to 3 (5 if using complementary I/O) using the
Specialty I/O Configuration menu.
6. Enter your setup information using the Modify G File menu.
Important:
SLC 5/02 processors scan chassis I/O slots left to right
starting at slot 1, regardless of the module type.
SLC 5/03 and later processors scan slots with discrete
I/O modules first, left to right starting at slot 1, and then
slots with specialty modules, left to right starting at slot
1.
The SLC 5/03 and SLC 5/04 processors cannot be programmed with the HHT.