BC Biomedical SA-2001 Uživatelský manuál stáhnout pdf (Strana 20)

The communication protocol provides a means to completely configure and use the

Analyzer from a PC or other device with RS-232 communications interface. This

provides for hands free or automated operation of the equipment.

Communication Port

The Serial port is configured as 115,200 Baud Rate, 8 Data Bits, 1 Stop Bit, and No

Parity.

Command Syntax

The command description is broken into columns; the KEYWORD, the NODE and the

VALUE.

The KEYWORD provides the name of the command. The actual name of the command

consists of one or more keywords since SCPI commands are based on a hierarchical

structure, also known as a tree system.

In such a system, associated commands are grouped together under a common node in

the hierarchy, analogous to the way leaves at a same level are connected at a common

branch. This and similar branches are connected to fewer and thicker branches, until

they meet at the root of the tree. The closer to the root, the higher a node is considered

in the hierarchy. To activate a particular command, the full path to it must be specified.

This path is represented in the following tables by placing the highest node in the left-

most position. Further nodes are indented one position to the right, below the parent

node.

The highest level node of a command is called the Keyword, followed by the Node, and

then the value.

Some commands allow for reading and writing data and some commands are Read

Only. To indicate a read function, a question mark (?) is placed at the end of the

command path. For example, to change the mode to Earth Resistance measurement,

“CONFigure:MODE ERESistance<cr>”, where <cr> indicates a carriage-return. To read

the current operating mode of the device, a mode read command would be

“CONFigure:MODE?<cr>”, which would return the current operating mode of the device.

Lowercase letters indicate the long-form of the command (for example,

CONFigure:MODE MVOLtage) and can be omitted for simplification. Uppercase

letters indicate the abbreviated, or short-form, of the commands and must be included

(for example, CONF:MODE MVOL).

All commands sent to the unit are terminated with a Carriage Return.

NOTE: Commands can be entered in either upper or lowercase or a mixture of the two,

uppercase and lowercase. Commands sent to the device are not case sensitive. Upper

COMMUNICATION PROTOCOL

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Žádné komentáře

BC Biomedical SA-2001 Uživatelský manuál Strana 20