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Frequency fault
If the frequency of the phases is outside of the permissible range for multiple subsequent
measurements (e.g. interferences over a long period of time), a frequency error is signaled
to the user (see section Manufacturer-specific error codes (Page 141)).
This error is a group error across all possible POMs.
● Error reaction POM4320
The heater is not turned off and the measured value for the last recognized and valid
frequency remains.
● Error reaction POM4320 Highend
The heater is turned off. No measured values except for the heat sink temperature are
output in case of a shutdown due to a frequency error.
9.7.6
Temperature monitoring
Internal temperature monitoring
A sensor is installed inside the heating control system (POM) to measure the internal
temperature.
An alarm threshold is defined for the internal temperature. The following reactions are
triggered when the threshold is overshot:
● Signal to the higher-level controller.
● The channels are deactivated - regardless of which channel response was configured for
the error (see section Behavior of the power outputs (Page 113)).
Note
If an internal temperature of 0°C is reported, this means that a temperature sensor has been
torn off.
Cooling via fan
To achieve even heat distribution, an external fan is mounted on the POM enclosure. The
fan is controlled depending on the internal temperature.
If it should prove necessary to control the fans continuously, this can be done by the user.
SIPLUS HCS4300 PROFINET/PROFIBUS DP
Operating Instructions, 10/2019, A5E35452705A/005
Functions
9.7 Monitoring functions
121
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