Siemens SIMATIC IPC477D Operating Instructions Manual page 238

Technical information
8.5 Hardware descriptions
Watchdog enable register / 066h select register (r/w address 062h)
0
1
238
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0
1
94 ms / 2 s (default)
210 ms / 4 s
340 ms / 6 s
460 ms / 8 s
590 ms / 16 s
710 ms / 32 s
840 ms / 48 s
960 ms / 64 s
Red LED (WD) off
Red LED (WD) on
WD inactive
WD triggered
Reset LED after watchdog alarm
(Bit 7 = write 1)
Operating Instructions, 11/2016, A5E31347228-AF
Scaler watchdog time (Normal/Macro)
Trigger red Watchdog LED
Watchdog error / Display and reset
SIMATIC IPC477D, IPC477D PRO