User Documentation

Data recorder
System manual
2696790000/02/04.2020
79
State Description
recording A recording is carried out.
stopped The recording is stopped or ended.
waiting
The start trigger or start delay is waited upon before the recording is car-
ried out.
Recording mode
The following recording types are possible:
● Standard: the values of all variables are stored per individual recording
● Change-based: The values of all variables are stored upon a change of
a certain variable
A change-based recording does not monitor all variables of the profile, but
rather only a specific variable. If its value changes, the values of all profile
variables is are recorded. Optionally, the recording of the values with respect
to the detection of a change can be reduced in importance.
Example
Change-based recording with a monitored variable prodCnt and a reduction
of the storage by a factor of 2, only the values that are written in bold are
stored.
prod-
Cnt
1 1 2 2 3 3 4 4 5
weight 14 15 16 14 15 13 14 15 16
tmp 60 60 60 61 61 60 60 60 60
Information
The initial sampling of a variable since its registration with a profile always
results in it being stored, since the variable value is in any case applied as
being changed.
Quantity limits
It is relevant for some applications that recordings should not run endlessly,
but instead should be automatically stopped after a defined number of
recordings. Furthermore, it may be sensible not to begin the recording imme-
diately after start-up, but rather only after a certain time frame (especially if a
trigger actuates the start and relevant data is only available a little while after
the trigger).
For this purpose, the following limits can be set:
● Start delay: Defined number of calls after recording start, that do not
generate any recordings. Only after this quantity are the variable values
recorded.
● Number of the recordings to be stored: Number of calls (without start de-
lay) until the recording is automatically stopped.