Frequency Monitoring; Temperature Monitoring - Siemens SIPLUS HCS Operating Instructions Manual

9.6.4

Frequency monitoring

Frequency monitoring
The frequency of the applied line voltage is automatically detected and monitored. The
frequency value can be read by the user.
Frequency
50 Hz
60 Hz
Frequency fault
If the frequency of at least one phase lies outside the permissible range for several
consecutive measurements (e.g. due to disturbance over an extended period), a frequency
fault will be reported to the user (see section Diagnostics data). The heating unit is not
switched off and the measured frequency values continue to be updated.
9.6.5

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 74)).
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
Operating Instructions, 11/2015, A5E35452705A/002
Valid range
47 Hz to 55 Hz
55 Hz to 63 Hz
Functions
9.6 Monitoring functions
79