Woodward
Manual MRIK3-C EN
50
DOK-TD-MRIK3-C Rev. A
6.10
Fault Recorder (FR)
6.10.1
Fault Recorder
The existing store can be utilised in two ways:
Not to be overwritten
Previous recordings will not be overwritten. When there is no memory space left, further recordings
are not possible.
Overwrite
The latest fault incidents can always be called up; the eldest recording is overwritten by a new one.
Parameter
Mode
Time per record (s)
Adjustment*
50 Hz
60 Hz
S=1 overwrite
8.00
6.66
S=2
Not to be
overwritten
8.00 6.66
S=3 overwrite
4.00
3.33
S=4
Not to be
overwritten
4.00 3.33
S=7 overwrite
2.00
1.66
S=8
Not to be
overwritten
2.00 1.66
* s = total no. of recordings
Table 6.2: Number and size of disturbance records
The storage zone of the fault recorder is designed as ring buffer. In the example shown below stor-
age of 7 fault recordings are possible (overwriting). The 8
th
segment serves as buffer store.
Memory space 6 to 4 is used.
Memory space 5 is needed for temporary storage of ongoing signals.
Figure 6.6: Partitioning of the store into 8 segments, for instance
This example shows that the store was used for more than 8 recordings because store spaces 6, 7
and 8 are used. From this it follows that no. 6 was the eldest recording and no. 4 the latest one.
