Pulse period measurement at the X1 input point.
X0 input signal
Measuring zone
M9076
DMO V D9 07 8 D 0
M9000
IRET
M9075
FEND
IX0F
. . . . . .. . . . . .
Use the M9075 to drive the M9076 to activate the X0's pulse measurement function.
The First End instruction. End of the main program.
The IX0F external interrupt pointer. When X0= ON → OFF, this subroutine executes once.
Since the M9080=OFF, it executes the pulse width measurement and moves the result
data from D9079, D9078 to D1, D0 registers.
The end of interrupt subroutine and return.
M9077
M9081
DMO V D9 08 4 D 1 0
M9000
IRET
M9075
X20
FEND
IX1P
. . . . . .. . . . . .
Use the M9075 to drive the M9077 to activate the X1's pulse measurement function.
The IX1P external interrupt pointer. When X1= OFF → ON, this subroutine executes once.
If the M9081=ON, it executes the pulse period measurement and moves the result
data from D9085, D9084 to D11, D10 registers.
Use the X20 to drive the M9081. If that is ON, executes the pulse period measurement function.
M9081
D9085,D9084
will not be updated
X1
This interval must ≥ one PLC's Scan Time
As shown in the figure above, after the period measurement mode (M9081= OFF → ON) is selected, the measured
value of the period in D9085 and D9084 will not be updated at the first rising edge until the next rising edge is
appeared.
57
Program example 1:
Pulse width measurement at the X0 input point.
Program example 2:
X1 input signal
Measuring zone
The First End instruction. End of the main program.
The end of interrupt subroutine and return.
D9085,D9084
will be updated
D9085,D9084
will not be updated
D9085,D9084
will be updated
To Next Page
Loading...
Need help?
General