Omron CJ - PROGRAMMING MANUAL 12-2009 Programming Manual page 77

Basic Concepts
■
Timing Chart
Bit A
Bit A
Operation
of SET
• Input Instructions (Logical Starts and Intermediate Instructions): The
instruction reads bit status, makes comparisons, tests bits, or perform
other types of processing every cycle and will output an ON execution
condition (power flow) when results switch from OFF to ON. The execu-
tion condition will turn OFF the next cycle.
Upwardly differentiated input instruction
■
Timing Chart
Bit A
Bit A
Bit B
• Input Instructions (Logical Starts and Intermediate Instructions): The
instruction reads bit status, makes comparisons, tests bits, or perform
other types of processing every cycle and will output an OFF execution
condition (power flow stops) when results switch from OFF to ON. The
execution condition will turn ON the next cycle.
Upwardly differentiated input instruction
■ Timing Chart
Bit A
Bit A
Bit B
@SET
Example
ON execution condition created for one
cycle only when CIO 000103 goes
from OFF to ON.
Bit B
1 cycle
Example
0001
03
OFF execution condition created for one
cycle only when CIO 00103 goes from
OFF to ON.
Bit B
1 cycle
Section 2-1
37