SCHOTT Instruments CT 52 Mode D'emploi page 51

Like all parameters which can be entered through the keypad, interface parameters
are stored in memory even after the circulator is turned off.
25.2. Communication with a PC
Suitable terminal programs for communicating with a PC are:
• MS-Windows
• MS-DOS
- Procomm Plus, Datastrom Technologies.
• MS-DOS
- Norton Utilities.
Factory settings of the serial interface RS232C:
Baudrate:
Parity:
Handshake:
Data bits:
Stop bits:
- TERMINAL.EXE (included with MS-Windows).
If the circulator is put into remote control mode via the configuration level, the
display will read "r OFF" = REMOTE STOP.
The circulator is now operated via the computer.
In general, the computer (master) sends commands to the circulator (slave).
The circulator sends data (including error messages) only when the computer
asks for it..
A transfer sequence consists of:
•
command
•
space (⇔; Hex: 20)
•
parameter (the character separating decimals in a group is the period)
•
end of file (↵; Hex: 0D)
The commands are divided into in or out commands.
in commands:
out commands:
The out commands are valid only in remote control mode
Examples:
• Command to set the working temperature to 55.5 °C:
out_sp_00⇔55.5↵
• Command to ask for the working temperature :
in_sp_00↵
• Response from the circulator:
55.5↵
Remote control
4800 bauds
2 (even)
1 (hardware handshake)
7
1
asking for parameters to be displayed
setting parameters