LC4 F
39
9. Remote
control
9.1. 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).
If the controller is put into remote control mode via the
configuration level, the display will read "r OFF" = REMOTE
STOP. The controller is now operated via the computer.
In general, the computer (master) sends commands to the
controller (slave). The controller 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 and out commands.
in commands:
asking for parameters to be displayed
out commands: setting
parameters
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 controller:
55.5
↵
