Watchdog Trigger Register (Read Only, Address 066H); Output Register User Led L1/L2/L3 (Read/Write, Address 404Eh) - Siemens SIMATIC IPC427E Operating Instructions Manual

Technical specifications
8.6 Hardware descriptions
8.6.4.3

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).
8.6.4.4

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
122
14 13 12-8 7
1
0
x
1
0
1
1
0
1
xxxx
xx
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
Operating Instructions, 09/2017, A5E37454814-AB
SIMATIC IPC427E