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Watchdog Trigger Register (read Only, Address 066h); Output Register User Led L1/l2/l3 (read/write, Address 404eh) - Siemens simatic ipc227e Operating Instructions Manual

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Watchdog enable register / 066h select register (r/w address 062h)
0
1
7.5.5.3

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).
7.5.5.4

Output register user LED L1/L2/L3 (read/write, address 404Eh)

Meaning of the bits
The "PC ON/WD" LED flashes yellow to indicate the progress of the BIOS self-test during
device startup. After the BIOS self-test has been completed, the "PC ON/WD" LED lights up
continuously green.
Output register L1/L2/L3 (read/write, address 404Eh)
Bits
15
1
1
0
SIMATIC IPC227E
Operating Instructions, 11/2016, A5E35782395-AB
0
1
14
13
12-8
7
1
0
x
1
0
1
1
0
1
xxxx
xx
Red LED (WD) off
Red LED (WD) on
WD inactive
WD triggered
Reset LED after watchdog alarm
(Bit 7 = write 1)
6
5
4-0
LED L1 / Run/Stop dark (default)
LED L1 / Run/Stop lit yellow
LED L1 / Run/Stop lit green
1
LED L2 / SF dark (default)
x
LED L2 / SF lit red
0
LED L2 / SF lit yellow
1
LED L3 / Maint dark (default)
x
LED L3 / Maint lit red
0
LED L3 / Maint lit yellow
xxxx
Reserved (read/write)
xx
Technical specifications
7.5 Hardware descriptions
Trigger red Watchdog LED
Watchdog error / Display and reset
117

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