Rockwell Automation 1771-DMC_DMC1_DMC4_DXPS Control Coprocessor User Manual - Manual (Page 132)

Appendix
B
B-1
Application Program Interface
Libraryof Functions
This appendix provides information on the Application Program Interface
(API) library of functions. For each function available, you are given the
following:
C syntax
parameters
returns
description
C
example
BASIC example
references
API is a library of functions and executable commands. The following are
the functions and commands available in the API library.
API Function Definition
BPI ControlĆcoprocessor commands that access the dataĆtable memory of a
programmable controller through the backplane interface (BPI)
CC ControlĆcoprocessor utility commands that handle functions such as trap
initialization, error handling, ASCII displays, etc.
DTL DataĆtable library (DTL) commands that access the dataĆtable memory of a
programmable controller that is directly connected (directĆconnect mode) to the
control coprocessor
MSG ControlĆcoprocessor message (MSG) commands that handle unsolicited
Message Instructions from a programmable controller ladderĆlogic program
(directĆconnect mode)
TAG ControlĆcoprocessor commands (TAG) that provide access to the
controlĆcoprocessor memory for external devices that are connected via the serial
interface(s); ControlView R is an example of such a device that would require
access to controlĆcoprocessor memory; TAG also provides access to
controlĆcoprocessor memory between OSĆ9 program modules
See Chapter 5, “Planning Programs for the Control Coprocessor”, for
information on how to use these API functions in your C, assembler, and
BASIC programs.
Appendix Objectives
What Is the Application
Program Interface