Mitsubishi Electric MELDAS C6 Programming Manual page 233

13. Program Support Functions
Iteration
Format
WHILE [conditional expression] DOm ; (m = 1, 2, 3 ..... 127)
END m ;
While the conditional expression is established, the blocks from the following block to ENDm are
repeatedly executed; when it is not established, execution moves to the block after ENDm. DOm
may come before WHILE, WHILE [conditional expression] DOm and ENDm must be used as a pair.
IF WHILE [conditional expression] is omitted, these blocks will be repeatedly ad infinitum. The
repeating identification numbers range from 1 through 127 (DO1, DO2, DO3, ....... DO127). Up to
27 nesting levels can be used.
(1) Same identifier number can be used any number
of times.
Possible
Possible
(3) Up to 27 nesting levels for WHILE− DOm. "m" is
any number from 1 to 127 for the nesting depth.
WHILE ~ DO1 ;
WHILE ~ DO2 ;
:
WHILE~DO27;
END 27 ;
:
END 2 ;
END 1 ;
(Note) :With nesting, "m" which has been used once
cannot be used.
WHILE ~ DO1 ;
END1 ;
WHILE ~ DO1 ;
END1 ;
DO1
DO2
DO27
13.5 User macro specifications
(2) Any number may be used for the WHILE −DOm
identifier number.
Possible
(4) The number of WHILE − DOm nesting levels
cannot exceed 27.
WHILE ~ DO1 ;
WHILE ~ DO2 ;
:
WHILE ~ DO3 ;
WHILE ~ DO28;
END 28;
END 3 ;
:
END 2 ;
END 1 ;
225
WHILE ~ DO1 ;
END1 ;
WHILE ~ DO3 ;
END3 ;
WHILE ~ DO2 ;
END2 ;
WHILE ~ DO1 ;
END1 ;