Watch Dog - Siemens LDS 6 Operating Instructions Manual

Operation

4.4 Watch Dog

4.4 Watch Dog
In the unlikely event that the software in LDS 6 should crash it will reboot with the help of a
watch dog. The instrument will be down for approximately 3 minutes if this should happen
and then measure normally again. It is very unusual that this should happen but if it does the
watchdog prevents the system from going down and stay down.
Module crash
Measurement
OK
Figure 4-4 Illustration of the events during a software crash.
64
From this point, normal
startup behaviour
Frozen value 0 mA output
0-16 s approx 1 min
Function control
mode (configurable)
0 mA out if response
is latest or if Function
control is off
approx 1 min
Operating Instructions, 01/2009, A5E00295894-05
Measurement
OK
LDS 6