,PROGRAMMING 
I 
No 
entry 
n 
J- 
t 
(F) 
Execution condition 
Indicates the execution condition of each instruction, details of which are shown 
below. 
Instruction which is always executed 
Instruction which  is executed  during  ON.  Executes  instruction 
only while the preceding condition 
of 
that instruction is 
ON. 
When 
the preceding condition is OFF,  that instruction 
is 
not executed 
and not processed. 
Instruction  which 
is 
executed  once  during  OFF.  Executes 
instruction  only  at  the  negative  transition  of  the  preceding 
condition of  instruction, i.e.  the  condition  changes from 
ON 
to 
OFF. Thereafter even if the condition is 
ON, 
that instruction is not 
executed and not processed. 
Instruction  which  is  executed  once  during 
ON. 
Executes 
instruction  only  at  the  positive  transition  of  the  preceding 
condition of  instruction, i.e.  the condition changes from  OFF 
to 
ON. 
Thereafter even if the condition is 
ON, 
that instruction is not 
executed and not processed. 
I 
Symbol 
I 
Execution Condition 
(G) 
Number of steps 
Indicates the number of program steps required for each instruction. 
80