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5. Disturbance recorder
The SEM SC11 device is fitted with a disturbance recorder that has access to volatile memory (vDAR)
and non-volatile memory (sDAR) areas. The resources provided allow for 15 seconds of recording with 100ms
resolution. The record contains the following data:

binary inputs and outputs of the device,

output current values for motor control,

supply voltage values;

8 optional binary signals applied to the control block,

link status at start and end of registration,

counters of the number of OPEN / CLOSE commutating operations performed,

a registry containing a failure type tag.
Fig. 5.1. Recorded waveform of the switch control operation
The recorder control is done using the function block placed on the logic diagram. If the recorder is active,
the appearance of a rising edge on the input starts the logging during which the data are stored in the volatile
memory. If a rising edge appears on one of the failure detection inputs during the logging, the entire waveform
will be rewritten to non-volatile memory. Only one (the first detected) waveform of an incorrect switching
cycle is saved in the non-volatile memory, . The readout and visualization of recorded waveforms is done
by means of a special utility software (appSC), which also allows the saved waveform to be saved
in non-volatile memory, allowing the next waveform to be saved. In Fig. 5.1., an example of the recorded
switch control operation is shown.