Mitsubishi MELSEC-Q Series User Manual page 222

12
COUNTER FUNCTION
(2) Coincidence detection interrupt function
12
- 8 12.5 Coincidence Detection Function
POINT
• When the first programmable controller CPU READY signal (Y0) is turned
ON after power-ON, the count value coincidence (X15, X19, and X1D)
turns ON since "
Therefore, write any value other than zero to "
detection point setting" and change the count enable command (Y1C to
Y1E) from OFF to ON, and again to OFF.
Note that the ON time must be 2.5ms or longer.
• The QD72P3C3 internal processing of coincidence detection may cause
the count value large (X14, X18, and X1C) or the count value small (X16,
X1A, and X1E) to turn ON when the count value coincidence (X15, X19,
and X1D) status changes from OFF to ON.
This function generates an interrupt request to the programmable controller CPU
during coincidence detection.
This interrupt request enables the start of interrupt processing programs.
(When using this function with the Q00JCPU/Q00CPU/Q01CPU, select the CPU of
function version B or later.)
(a) Up to 16-point interrupt factors (SI) are allowed for a single MELSECNET-Q series
intelligent function module.
As shown in the table below, the QD72P3C3 has 3-point interrupt factors (SI) for
coincidence detection.
SI No.
0
1
2
3 to 15
Timing of interrupt signal generation
Count value coincidence
(X15, X19, and X1D)
I/O signals
Coincidence signal reset
command (Y14 to Y16)
Interrupt request
QD72P3C3
internal
processing
Interrupt request clear
Program processing in
programmable controller
CPU
Coincidence detection point setting" is set to zero.
Cd.7
Interrupt factor
Channel 1: Coincidence detection of coincidence detection point
Channel 2: Coincidence detection of coincidence detection point
Channel 3: Coincidence detection of coincidence detection point
Interrupt program processing
Coincidence
Cd.7
Reserved