Onboard Programs And Buffers; Host Communications - National Instruments PXI-7340 User Manual And Specifications

If an encoder resource is not needed for axis control, you can use it for any number of other
functions, including position or velocity monitoring, as a digital potentiometer encoder input, or
as a master encoder input for master/slave (electronic gearing) applications.
Each axis also has an associated forward and reverse limit input, a home input, a high-speed
capture trigger input, a breakpoint output, and an inhibit output. These signals can be used for
general-purpose digital I/O when not being used for their motion-specific purpose.

Onboard Programs and Buffers

The NI 7340 motion controller has full onboard programmability capable of executing up to
10 simultaneous motion programs.
You can execute the NI-Motion function set from onboard programs. In addition, the onboard
programs support basic math and data operation functions for up to 120 general-purpose
variables.
You can store and run onboard programs and buffers from RAM or save them to flash ROM. The
NI 7340 motion controller has 64 KB of RAM and 128 KB of ROM that is divided into
two 64 KB sectors for program and buffer storage. You can store and run programs and buffers
from either RAM or ROM, but you cannot split programs between the two, and you cannot split
programs or buffers between the two 64 KB ROM sectors.
Note Refer to the NI-Motion Help for detailed information about all of these
onboard programming and buffer features.

Host Communications

The host computer communicates with the controller through a number of memory port
addresses on the PCI or PXI host bus.
The primary bidirectional data transfer port supports FIFO data passing in both send and
readback directions. The NI 7340 motion controller has both a command buffer for incoming
commands and a return data buffer (RDB) for returning data.
The communications status register (CSR) provides bits for communications handshaking as
well as real-time error reporting and general status feedback to the host PC. The move complete
status (MCS) register provides instantaneous motion status of all axes.
NI 7340 User Manual and Specifications
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