Siemens SIMATIC IPC477E User Manual

Technical information
8.5 Hardware descriptions
SIMATIC IPC477E
146 Operating Instructions, 12/2016, A5E37455003-AB
8.5.4
I/O Address Areas
8.5.4.1
Overview of the internal module registers
The following addresses are used for the internal registers:
Addresses
Input/output unit
I/O 062h
Watchdog enable register / 066h select register (Page 146)
I/O 066h Watchdog trigger register (Watchdog enable register bit 2=0), Watchdog trig-
ger register (Watchdog enable register bit 2=1) (Page 146)
I/O 50Ch
Battery status register (read-only) (Page 147)
8.5.4.2
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).
8.5.4.3
Watchdog enable register / 066h select register (read/write, address 062h)
Meaning of the bits
Watchdog enable register / 066h select register (r/w address 062h)
Bit
Meaning of the bits
7
6
5
4
3
2
1
0
Watchdog enable bit (WDE)
0
Watchdog circuit disabled
1
Watchdog circuit enabled
Watchdog Mode
0
Standard
1
Macro
066h select register selection
0
Reserved
1
Scaler watchdog time (Normal/Macro)
0
0
0
94 ms / 2 s (default)
0
0
1
210 ms / 4 s
0
1
0
340 ms / 6 s
0
1
1
460 ms / 8 s
1
0
0
590 ms / 16 s

Siemens SIMATIC IPC477E Specifications

General

Brand	Siemens
Model	SIMATIC IPC477E
Category	Industrial PC
Language	English