Vector VEC-VA Series - FTRIG (Falling Edge Detection Command ); RTRIG (Rising Edge Detection Instruction )

VA Motion Controller Programming Manual
181
10.2.4 F_TRIG (falling edge detection command )
IL programming
language
LD, FBD programming language
Function: F _TRIG instruction is used to detect the falling edge of the input . If a falling edge
is detecteDAt the input CLK , the output Q will change from FALSE to TRUE until the next scan of
this command, the Q output will remain is TRUE
LD varl
ST F_TRIG_1.CLK
CAL F_TRIG_1
LD F_TRIG_1.Q
ST var2
ST
programming
language
F_TRIG_ 1 ( CLK:=var1 )
Var2:=F_TRIG_1.Q
Note :
IL, ST
language programming needs to insert variables
varl1~var2
or use constants in
the current
POU
variable worksheet
 the F_TRIG
data processing instruction type
parameter
type of data
description
CLK
BOOL
Falling edge is valid
Q
BOOL
When
CLK
has a falling
edge,
Q=
changes from
0
to
1,
until the next scan
to this instruction
10.2.5 R_TRIG (rising edge detection instruction )
IL
programming
language
LD, FBD
programming language
Function: R _TRIG instruction is used to detect the rising edge of the input . If a rising edge is
detecteDAt the input CLK , the output Q will change from FALSE to TRUE until the next scan to this
command, the Q output will remain Is TRUE .
LD var1
ST R_TRIG_1.CLK
CAL R_TRIG_1
LD R_TRIG_1.Q
ST var2