Difd - Omron SYSMAC CP Series Instruction & Reference Manual

DIFD

Instruction
DIFFERENTIATE DOWN
Symbol
Applicable Program Areas
Area Step program areas
Usage OK
Operands
Operand
R Bit
Operand Specifications
Word addresses
Area
CIO WR HR
B OK OK OK
Flags
No flags are affected by DIFD(014).
Function
When the execution condition goes from ON
to OFF, DIFD(014) turns R ON. When
DIFD(014) is reached in the next cycle, R is
turned OFF.
Hint
• DOWN(522) can be used to execute an instruction for just one cycle when the execution condi-
tion goes from ON → OFF.
• The operation of DIFD(014) depends on the execution condition for the instruction itself as well
as the execution condition for the program section when it is programmed in an interlocked pro-
gram section, a jumped program section, or a subroutine.
• DIFD(014) has immediate refreshing variation (!DIFD(014)). When a CPU Unit built-in output bit
has been specified for R in this instruction, any changes to R will be refreshed when the instruc-
tion is executed and reflected immediately in the output bit.
CP1E CPU Unit Instructions Reference Manual(W483)
Mnemonic Variations
DIFD !DIFD
Description
AR T C DM
OK --- --- ---
Function
code
DIFD(014) turns the designated bit ON for one
014 cycle when the execution condition goes from ON
to OFF (falling edge).
DIFD
DIFD(014)
R R: Bit
Subroutines
OK
Data type
BOOL
Indirect DM addresses
Constants
@DM *DM
--- --- ---
Execution condition
Status of R
2 Instructions
Function
Interrupt tasks
OK
Size
---
CF Pulse bits TR bits
--- --- ---
1 cycle
2-27
2