Olympus Sonic 1200S/HR, Руководство пользователя

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130 Chapter 7
7.3 Modes of Operation
Two communication modes are available: HOST mode, which permits computer
communication with the instrument, and TERMINAL mode, which is designed for use with a
terminal. Each time the Sonic
®
1200S/HR is powered on, the operating mode is set to HOST
mode. The RS-232 command set is identical for both modes, but the way in which the Sonic
®
1200S/HR responds to serial input differs.
Terminal Mode
In terminal mode, each character is echoed back as it is received. Carriage returns are echoed
back as carriage return and line feed. All responses are terminated by carriage return and line
feed. Prompts, terminated by carriage return and line feed, are returned in all cases.
PromptDescription
“>” ....Command Accepted
“C?” ....Invalid Command
“V?” ....Invalid Value
HOST Mode
In HOST mode, characters are not echoed back. All responses are terminated by a carriage
return only. Prompts are only returned in the event of error conditions, such as the following:
PromptDescription
“C?” ....Invalid Command
“V?” ....Invalid Value
Space (20 Hex) and line feed (0A Hex) characters are ignored in most cases. To prevent the
loss of data, it is important that the HOST/TERMINAL not attempt another serial transaction
until a response from the previous transaction is received (carriage return for HOST mode;
prompt, carriage return, and line feed for TERMINAL mode). All commands to the Sonic
®
1200S/HR must be terminated by a carriage return (0D Hex). All information sent by the
Sonic
®
1200S/HR is terminated according to the serial mode (carriage return for HOST mode;
carriage return and line feed for TERMINAL mode).
7.4 Command Strings
Serial communication is performed using ASCII characters (with the exception of binary data
transfers). A command string is comprised of three or more ASCII characters and a carriage