ADVANCED MICRO SYSTEMS, INC. | SERIAL INTERFACE |
4.Party Select (pin 8). Each axis tests this input after reset (power up or in response to a ^C command) to determine either single or party line mode. Single mode (ONLY one axis connected) is used for debug, programming for
Serial Communications Overview
There are three methods (protocols) used to send and receive command and data from an AMS controller (axis):
1. Simple “Dumb” Communications
This is accomplished by connecting one single axis to the computer. Commands can be typed in and the controller will execute them. The designer can also enter program sequences into the NV memory and execute them. Virtually every capability can be explored. It is a “human friendly” interface and NEVER a computer controlled operation.
Serial adapters used:
At start
1.If using a
2.Hit the SPACE BAR key to sign on after reset.
2.Party Line Mode
Party line mode is intended for
Between 1 and 32 axis are configured as “slaves.” Unlike the “Dumb” mode, a proper character by character echoed protocol is necessary for proper operation. The
Serial adapter used:
At start
1.Make sure the serial adapter is in “party line” mode.
2.The host computer interrogates and records axis name(s).
3.Daisy Chain Mode (not recommended for more than 1 axis)
This older protocol is similar to the party line mode but
The only advantage is that the name can be dynamically assigned by the host computer on power up sequence and the computer protocol can be implemented with the lowest cost
Serial adapters used:
1. The host computer emits axis #1 name, receives ending axis name +1.
Serial Communications Software
Today’s computers are mostly a derivative of the IBM PC. Almost all of these computers include at least one serial
For many years PC’s have used DOS as the basic operating software. In recent years however, Windows has replaced DOS in many applications. So, the system designer must make choices about the application requirements.
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