ABB RELION 620 Series Technical Manual page 781

1MAC504801-IB E
10.1.1.3
10.1.1.4
620 series ANSI
Technical Manual
Manual triggering
The recorder can be triggered manually via the LHMI or 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 10
Recording functions
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