NCT Group NCT 990T - Manual (Page 56)

4 Editing part programs
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Beginning and end of program
The program begins and ends with character %.
As a new program is loaded with the help of NEW action on DIRECTORY screen string
%Onnnns%
is formed automatically.
In the course of editing a part program on the CNC the opening and closing % characters
and the program number (Onnnn) do not appear in the program list and edit field therefore
they can not be altered.
If one edits a part program on an external device e.g., on a PC the opening and closing %
characters and the program number (Onnnn) must be typed in.
Program format in memory
The program in memory is a set of ASCII characters. Its format is:
%O1234(PROGRAM’S NAME)s/1 N12345 G1 X0 Y...sG2 Z5....s.....s.....sG0
G40...M 2%
In the above string:
s represents Line Feed character,
% stands for the beginning and end of program.
Program format in case of communicating with an external device.
The above program format is applicable also in case of communicating with an external device.