Functions
9.6 Monitoring functions
SIPLUS HCS4200
Operating Instructions, 11/2015, A5E35066204A/RS-AA/002
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9.6.3
Monitoring of the 24 V DC supply voltage
The 24 V DC supply voltage is monitored on the CIM. If the 24 V fails, the power outputs of
the POMs are automatically deactivated. There is no manufacturer-specific diagnostics
alarm in the case of failure of the 24 V supply. Instead, the PROFINET/PROFIBUS controller
detects and signals failure of the HCS system or individual modules.
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
Valid range
50 Hz
47 Hz to 55 Hz
60 Hz
55 Hz to 63 Hz
Frequency fault
If the frequency of both phases 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 is not switched off and the
last valid frequency value measured is retained.
