Rockwell Automation 1746-BTM Barrel Temperature Control Module User Manual - Manual (Page 70)

Publication 1746-UM010B-EN-P - April 2001
9-2 Sample Program
communications program file 4 and in the main program file 2. Later
there will be an example for the code that will need to be added.
BTM201.rss Data Table Layout
The data table layout for this version of code has change considerably
from the current BTM application code. The biggest change is that the
input and output images are now buffered. This means that you will
now manipulate all input and output data thru the buffer area, not in
the actual input and output images. If you manipulate data in the
actual input and output image the buffers will over write them. The
following is a layout of the new data tables. The M-file and the rotator
information have been moved into a different data table. In the
previous version the information was located in N7.
Table 9.A BTM201.rss N7 Data Table
Location Description
N7:0 User request pending
N7:1 User request being serviced
N7:2 Request mask
N7:3 Bit 0 request complete cleanup needed
N7:4 Indirect address for pointer in rotator
N7:5 Rotator bits
N7:6 Bit 0, all requests and acknowledges cleared
N7:7 Data table pointer for M1/M0 communications
N7:8 Slot pointer for M1/M0 communications
N7:9 What BTM are we currently working on for M1/M0
communications
N7:10 Data table pointer for rotator code
N7:11 What BTM are we working on for rotator code
N7:12 Master Command requests for M1M0 communications
N7:13 Rotator code input bits = output bits memory
N7:14 Rotator initialization data table to use
N7:15 Rotator initialization what BTM are we doing
N7:16 Data table for first BTM
N7:17 Slot number for first BTM
N7:18 Number of BTMs in system
N7:19 Misc control Bits
N7:20 Rotator Level 1 or 2 check