Rockwell Automation 1746-BAS-T SLC 500 Basic Basic-T Modules - Manual (Page 67)

Publication 1746-UM004B-EN-P - December 2005
Programming Overview 4-19
Transfer Data Between the SLC Processor and the Module
Use the module to interface with the SLC processor. For example, the
module performs large mathematical calculations for the processor
that the SLC processor uses to execute an operation. The commands
in the following table are used to transfer data either to or from the
SLC processor.
Status Information for the SLC Processor
Input image word 0 for the module slot contains two status bits. One
status bit informs the SLC processor of the mode the module is
presently in. The other status bit informs the SLC processor of the
battery status. These status bits are:
• I:e. 0/13 = 0 battery OK, 1 battery low
• I:e. 0/15 = 0 module in Run mode, 1 module in Command mode
Command Purpose
CALL 14 Converts 16-bit signed integer located in the BASIC input buffer to BASIC
floating-point.
CALL 15 Converts 16-bit unsigned integer located in the BASIC input buffer to BASIC
floating-point.
CALL 24 Converts BASIC floating point to a 16-bit signed integer and places the result in
the BASIC output buffer.
CALL 25 Converts BASIC floating point to its 16-bit binary representation.
CALL 53 Transfers the eight words in the CPU output image table to words 200...207 of the
module input buffer.
CALL 54 Transfers words 200...207 of the module output buffer to the CPU input image
table.
CALL 56 Transfers the words in the CPU M0 file to words 100...163 of the module input
buffer.
CALL 57 Transfers words 100...163 of the module output buffer to the CPU M1 file.