Programming Information
114
Doc No: UMAN\FL\0110
Rev. No.: 1.02B
7.7 Program execution sequence
The instructions execution sequence is shown below.
(1) They are executed in the sequence from block 1 through the final block which contains the END instruction (or
IRET in an interrupt program).
(2) They are executed in the sequence from rung 1 through the final rung in a block (or the END instruction).
(3) They are executed according to the following rules in any one rung.
The instructions execution sequence in which function instructions are included also follows the above rules. How-
ever, for program execution control instructions, such as jumps (JCS), loops (FOR-NEXT), subroutines (CALL-SUBR-
RET), it will depend on the specifications of each instruction.
When there is no vertical
connection, they are
executed from left to right.
When there is an OR
connection, the OR logic
portion is executed first.
When there is a branch, they
are executed in the order from
the upper line to the lower line.
A combination of and
above.
4321
86
7
2
5431
6
4
5
321
5
3
76421
1
2
3
4
2 3
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