Program Formats - Mitsubishi Electric MELDAS C6 Programming Manual

3. Data Formats

3.2 Program formats

Function and purpose
The prescribed arrangement used when assigning control information to the controller is known as
the program format, and the format used with this controller is called the "word address format".
Detailed description
(1) Word and address
A word is a collection of characters arranged in a specific sequence. This entity is used as the
unit for processing data and for causing the machine to execute specific operations. Each
word used for this controller consists of an alphabet letter and a number of several digits
(sometimes with a "–" sign placed at the head of the number.).
The alphabet letter at the head of the word is the address. It defines the meaning of the
numerical information which follows it.
For details of the types of words and the number of significant digits of words used for this
controller, refer to the "format details".
(2) Blocks
A block is a collection of words. It includes the information which is required for the machine to
execute specific operations. One block unit constitutes a complete command. The end of each
block is marked with an EOB (end-of-block) code.
(Example 1:)
G0X - 1000 ;
G1X - 2000F500 ;
(Example 2:)
(G0X - 1000 ; )
G1X - 2000F500 ;
(3) Programs
A program is a collection of several blocks.
(Note 1) When there is no number following the alphabetic character in the actual program,
*
Word configuration
2 blocks
Since the semicolon in the parentheses will not result
in an EOB, it is 1 block.
the numeric value following the alphabetic character is handled as a 0.
(Example) G28XYZ; → G28X0Y0Z0;
Word
Numerals
Alphabet (address)
7
3.2 Program formats