The reaction to the warning is freely adjustable. All setting options for configurable
errors are available.
The default setting is "Warning". That means: upon reaching the pre-warning tem-
perature, bit 2 is set in ru02 warning bits and with respective setting of the warning
mask also bit 7 in the status word.
pn06 defines how the reference level for generating the overtemperature warning
is determined:
temperature warning setting mode
ru25[1] heatsink temperature 1, ru25[2] heatsink temperature 2 and
ru25[3] heatsink temperature 3 are compared with pn07 OH warning
level.
If one of the heatsink temperatures is higher than the comparison value,
the warning becomes active. If all heatsink temperatures are lower than
the comparison value minus the hysteresis (5 °C), the warning is reset.
pn07 OH warning level defines the distance to the overtemperature trip-
ping threshold whose undershooting shall trigger the warning.
If one of the heatsink temperatures is closer to its associated shutdown
threshold than pn07, the warning becomes active. The warning will be
reset if all heatsink temperatures are outside the range of pn07 plus hys-
teresis (5 °C).
device-dependent switch-off temperature
adjustable OH warning level
Figure 10: Overtemperature heatsink (OH)
off on off on off
No exception E.OH reset E.OH
t
T (OH)
T [°C]
pn07
Warning
Error
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