Extended device functions
5.4 Watchdog (WD)
SIMATIC IPC547D
Operating Instructions, 06/2011, A5E03473780-01
55
The fan error remains stored until the cause of the fan failure has been rectified. You can
reset the error message with one of the following measures:
● Acknowledgment of the error message with the DiagBase or DiagMonitor software.
● Restart the device.
5.4 Watchdog (WD)
The watchdog monitors program execution and reports a program crash to the user by
means of various reactions.
The watchdog can only be activated using the monitoring software. The watchdog is idle
when the device is switched on or after a HW RESET (cold restart), which means that no
reaction of the watchdog is triggered. If the watchdog is activated and was not retriggered by
the monitoring software within the set time, a watchdog alarm is triggered.
5.5 Battery monitoring
The installed backup battery has a limited service life, see chapter "Replacing the backup
battery (Page 70)". Two-tier battery monitoring che
cks the status of the backup battery. The
SIMATIC DiagBase and SIMATIC DiagMonitor diagnostic software determines the status of
the backup battery.
When the first warning level is reached, the battery for buffering CMOS data still has a
remaining service life of at least one month.
5.6 Active Management Technology (AMT)
AMT (Active Management Technology) is technology for the remote maintenance of
computers (simply called AMT-PC in the remainder of the document) and it includes the
following functions:
● Keyboard–Video–Mouse (KVM) redirection: Using KVM that is integrated in the AMT
hardware you access the AMT PC remotely. With KVM, you can also control AMT PCs
that have no or a defective operating system. A KVM remote session is always possible
with the KVM server integrated in the firmware. This means you can restart the PC and
change the BIOS setup remotely.
● Remote power management: AMT PCs can be turned on and off and restarted from
another PC.
● SOL (Serial over LAN): Redirection of the data of a serial interface to the network. The
main use of the function is text-based remote control of an AMT PC using a console.
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