2. System component
26
REFERENCE: State change detection function (ON/OFF)
For SDI01 with the firmware V2.0 or later, the state change detection function can be used.
This function detects the state changes (rising edge and falling edge) of DI input and retains the state for a
certain period of time.
Retention time of change detection can be set with the engineering tool (set the item in CDDI retention time
in module setting information). Retention time can be set up to 25500msec by units of 100msec.
Normally, it is set according to the scan cycle.
● Rising edge detection data =(DI data)OR(Retain rising edge detection for CDDI)
● Falling edge detection data =(DI data)AND(Retain falling edge detection for CDDI)
DI
Rising edge detection
Rising edge detection data
CDDI retention time
DI
Rising edge detection
Rising edge detection data
CDDI retention time
DI
Rising edge detection
Rising edge detection data
CDDI retention time
DI
Rising edge detection
Rising edge detection data
CDDI retention time