Temperature Monitoring/Display; Watchdog (Wd) - Siemens SIMATIC IPC627D Operating Instructions Manual

Extended device functions
5.1 Monitoring Functions
5.1.2

Temperature monitoring/display

Four temperature sensors monitor the temperature of the device at several positions:
● Processor temperature
● Temperature close to the RAM ICs/chips
● Temperature of the basic module below the power supply
● 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
The DiagBase or DiagMonitor software alerts the user.
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
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
50
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
SIMATIC IPC627D/827D
Operating Instructions, 09/2014, A5E32990859-AB
Option
None