65
11.2. Communication with a PC or a superordinated data system
Suitable terminal programs for communicating with a PC are:
•
MS-Windows
- TERMINAL.EXE (included with MS-Windows).
S xx.xx
ID 0
R
If the temperature system is put into remote control mode via the
configuration level, the display will read
"R -OFF-" = REMOTE STOP.
In general, the computer (master) sends commands to the instrument
(slave). The instrument sends data (including error messages) only
when the computer sends a query.
D A transfer sequence consists of:
•
address (RS485 interface only)
•
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:
asking for parameters to be displayed
out commands: setting
parameters
The out commands are valid only in remote control mode.
When the RS485 interface is used, the three-digit instrument address
stands in front of each command.
(example: address Ad32 = A0 3 2 )
Examples:
Command to set the working temperature to 55.5 °C
out_sp_00
⇔
55.5
↵
A032_out_sp_00
⇔
55.5
↵
Command to ask for the working temperature :
in_sp_00
↵
A032_in_sp_00
↵
Response from the instrument:
55.5
↵
A032_55.5
↵
Summary of Contents for Presto Plus LH 47
Page 20: ...Operating controls and functional elements 20 Rear...
Page 41: ...41...
