Siemens SIMATIC IPC277E User Manual

Technical specifications
8.5 Hardware description
SIMATIC IPC277E
Operating Instructions, 11/2019, A5E35783335-AE
123
Watchdog enable register / 066h select register (r/w address 062h)
Trigger red Watchdog LED
0
Red LED (WD) off
1
Red LED (WD) on
Watchdog error / Display and reset
0
WD inactive
1 WD triggered
Reset LED after watchdog alarm
(Bit 7 = write 1)
8.5.4.3 Watchdog trigger register (read only, address 066h)
Watchdog trigger register
The watchdog is triggered by a read action (address 066h) by this register. The result of the
read access can be disregarded (i.e., dummy read).
8.5.4.4 Battery status register (read-only, address 50Ch)
The status of the CMOS battery is monitored; the status (two-tier) can be read from the
battery status register.
Meaning of the bits
Battery status register (read-only, address 404Dh)
Bit
Meaning
7
6
5
4
3
2
1
0
0
0
CMOS battery capacity is still sufficient.
0 1 CMOS battery capacity is exhausted (remaining capacity is
sufficient for approx. one month)
1
1
CMOS battery is empty

Siemens SIMATIC IPC277E Specifications

General

Brand	Siemens
Model	SIMATIC IPC277E
Category	Industrial PC
Language	English