Scan Time When The Wdt Instruction Is Used - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

Scan time when the WDT instruction is used

Even though the watchdog timer is reset using the WDT instruction, the scan time value is not reset. The scan timer value is
the value measured up to the END instruction.
Internal
processing time
Scan execution
END 0
program A
WDT measurement time
WDT reset (CPU module
internal processing)
Internal
Program
processing time
Scan execution
WDT END
program B
WDT
measurement
time
Clear
Scan time
WDT reset (CPU module
internal processing)
Scan execution
0
program A
Next WDT measurement
time
Next scan time
5 SCAN MONITORING FUNCTION
5
45
5.3 Precautions