7. System settings
7.13 Retention function
7.13 Retention function
Only possible with easySoft 8.
It is a requirement of system and machine controllers for operating states or ACTUAL
values to have retentive settings. What this means is that the values will be retained
until the next time the ACTUAL value is overwritten.
There are two input fields (for the start and end values of the retention range) each
for markers and for the following function blocks.
Project view/ System settings tab
Fig. 297: Screenshot of Retention section that can be found in the System settings tab in the Project view
Value range for the function blocks, instances that can be stored retentively:
l
C - Counter relay : 01…32
l
CH - High-speed counter : 01…04
l
CI - Incremental counter : 01…02
l
DB - Data function block : 01…32
l
T - Timing relay : 01…32
For more information, please refer to the description for the relevant function block.
Marker value ranges:
l
MB : 1 …1024
l
MW : 1…512
l
MD : 1…256
The values from the input field will be automatically converted to MB marker bytes.
Marker ranges up to MB1024 can therefore be defined as retentive,
since e.g. MD265 corresponds to a marker byte range of 1021-1024 and
the retentive marker areas are only stored in MB.
Only available on easySoft Version 8.00 or higher.
If marker bytes are entered in the input field, these are also converted into the
highest possible data type, provided the number of marker bytes allows this. The con-
verted data type is displayed after a new switch to the System settings tab.
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