Temperature Monitoring/Display; Watchdog (Wd) - Siemens SIMATIC IPC477E Operating Instructions Manual

5.5.1.2

Temperature monitoring/display

Three temperature sensors monitor the temperature of the device at several positions:
• Processor temperature
• Temperature close to the RAM ICs/chips
• Temperature in proximity of the air inlet
A temperature error is triggered under these circumstances:
• The configured low threshold for the temperature has been violated.
• The configured high threshold for the temperature has been violated.
A temperature error causes the following reaction:
Reaction
Alarm window of the DiagBase or DiagMonitor software alerts the user.
The temperature error is saved until the temperatures have fallen below the thresholds and it
is reset by one of the following measures:
• Acknowledgment of the error message by the user with DiagBase or DiagMonitor software
• Restart of the device
5.5.1.3

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 addressed within the set time:
Option
Reset on
Reset off
Restart
Shutdown
Option is device-specific.
1
NOTICE
"Reset on" option
The "Reset on" option immediately triggers a hardware reset that may result in loss of data
under Windows and damage to the installation.
SIMATIC IPC477E
Operating Instructions, 11/2020, A5E37455003-AF
Reaction
Executes a hardware reset when the watchdog expires
Executes no action when the watchdog expires
1
Restarts the operating system when the watchdog expires
1
Shuts down the operating system when the watchdog expires
1
Operating the device and device functions
5.5 Extended device functions
Option
None
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