Watchdog (Wd) - Siemens SIMATIC IPC277G Operating Instructions Manual

The temperature error is retained in memory until temperatures have fallen below the
thresholds and it is reset by one of the following measures:
• Acknowledgment of the error message by the monitoring software
• Restart of the device
4.3.1.3

Watchdog (WD)

Configuration
You configure the watchdog with the DiagBase or DiagMonitor software.
Function
The watchdog is able to monitor system runtime and informs the user about the different
reactions that are triggered if the system does not respond to the watchdog within the
specified monitoring time.
A watchdog alarm is retained after a restart and is reset and logged by the DiagBase or
DiagMonitor software. The watchdog configuration is retained in the process.
Watchdog reactions
The following reactions can occur if the watchdog is not triggered within the set time:
Option
Reset on
Reset off
Restart
Shutdown
NOTICE
"Reset on" option
The "Reset on" option immediately triggers a hardware reset that can cause data loss on
Windows and damage to the installation.
Watchdog monitoring times
The hardware supports the following control unit times:
• 1 to 256 seconds
• 1 to 256 minutes
SIMATIC IPC277G
Operating Instructions, 08/2021, A5E50059956-AA
Reaction
Executes a hardware reset when the watchdog expires
Executes no action when the watchdog expires
Restarts the operating system when the watchdog expires
Shuts down the operating system when the watchdog expires
Commissioning the device and device functions
4.3 Advanced device functions
43