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Technical specifications

9.5 Hardware descriptions

SIMATIC IPC477E PRO

Operating Instructions, 08/2017, A5E39912462-AA

133

9.5.3

Input/output areas

9.5.3.1

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 (Page 134)

I/O 066h

Watchdog trigger register (Page 133)

I/O 404Dh Battery status register (Page 135) (read-only, if RTC_BAT_SURVEY_EN is

enabled)

See also

Watchdog trigger register (read only, address 062h) (Page 133)

Watchdog enable register (read/write address 062h) (Page 134)

Battery status register (read only, if the RTC_BAT_SURVEY_EN address is set to "1";

404Dh) (Page 135)

9.5.3.2

Watchdog trigger register (read only, address 062h)

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).

Siemens SIMATIC IPC477E PRO User Manual

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