Length Of Recordings; Sampling Frequencies - ABB Relion SMU615 Technical Manual

1MRS758407 B
7.2.2.3
7.2.2.4
SMU615
Technical Manual
Manual triggering
The recorder can be triggered manually via communication by setting the Trig
recording parameter to TRUE.
Periodic triggering
Periodic triggering means that the recorder automatically makes a recording at certain
time intervals. The user can adjust the interval with the Periodic trig time parameter.
If the value of the parameter is changed, the new setting takes effect when the next
periodic triggering occurs. Setting the parameter to zero disables the triggering
alternative and the setting becomes valid immediately. If a new non-zero setting needs
to be valid immediately, the user should first set the Periodic trig time parameter to
zero and then to the new value. The user can monitor the time remaining to the next
triggering with the Time to trigger monitored data which counts downwards.

Length of recordings

The user can define the length of a recording with the Record length parameter. The
length is given as the number of fundamental cycles.
According to the memory available and the number of analog channels used, the
disturbance recorder automatically calculates the remaining amount of recordings
that fit into the available recording memory. The user can see this information with the
Rem. amount of rec monitored data. The fixed memory size allocated for the
recorder can fit in two recordings that are ten seconds long. The recordings contain
data from all analog and binary channels of the disturbance recorder, at the sample rate
of 32 samples per fundamental cycle.
The user can view the number of recordings currently in memory with the Number
of recordings monitored data. The currently used memory space can be viewed
with the Rec. memory used monitored data. It is shown as a percentage value.
The maximum number of recordings is 100.

Sampling frequencies

The sampling frequency of the disturbance recorder analog channels depends on the
set rated frequency. One fundamental cycle always contains the amount of samples set
with the Storage rate parameter. Since the states of the binary channels are sampled
once per task execution of the disturbance recorder, the sampling frequency of binary
channels is 400 Hz at the rated frequency of 50 Hz and 480 Hz at the rated frequency
of 60 Hz.
Section 7
Measurement functions
203