5) Step ladder instructions
6) Subroutine instructions
● When a differential instruction is combined with an AND stack instruction or a pop stack
instruction, take care that the syntax is correct.
■
Operation Example
(1) Program operation for "DF" in ladder diagram
X100
Y110
Leading edge
(2) Program operation for "DF/" in ladder diagram
X101
Y111
Trailing edge
Single scan
Trailing edge
(3) Program operation for "DFI" in ladder diagram
X100
Y110
Leading edge
Single scan
Single scan
Outputs to Y110 only for a single scan where X100 changes from the OFF state to
the ON state (i.e., rises).
Outputs to Y111 only for a single scan where X101 changes from the ON state to the
OFF state (i.e., falls).
Outputs to Y110 only for a single scan where X100 changes from the OFF state to
the ON state (i.e., rises).
■
Sample program
● For the circuit shown below, the operation is as follows.
3.8 DF, DF/ (Leading Edge Differential, Trailing Edge Differential), DFI
(Leading Edge Differential (Initial Execution Type))
WUME-FP7CPUPGR-12 3-13
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