Fan Monitoring; Watchdog (Wd) - Siemens SIMATIC Series Operating Instructions Manual

5.1.3

Fan monitoring

The operation of front fans, CPU, dual-head graphic card fans, power supply fans and fans
on the drive cage type A are monitored by SIMATIC monitoring software.
If a fan fails, the following reactions are triggered:
● The status indicator "FAN" flashes red. The fan of the dual-head graphics cards has no
influence on this.
● If the SIMATIC monitoring software is active, a fan alarm is output.
The fan error remains stored until the cause has been rectified. You can reset the error
message with one of the following measures:
● Acknowledge error message with SIMATIC IPC DiagBase or SIMATIC IPC DiagMonitor
● Short-term disconnection of the device from the power supply
● Shut down device
● Restart the device
5.1.4

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.
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SIMATIC IPC547G
Operating Instructions, 04/2020, A5E49948632-AA
Reaction
Executes a hardware reset when the watchdog expires
Executes no action when the watchdog expires
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Restarts the operating system when the watchdog expires
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Shuts down the operating system when the watchdog expires
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Expanded device functions
5.1 Monitoring functions
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