6. Function blocks
6.3 UF - User function block
Project view/ System settings tab
Figure 204: Screenshot of Retention section that can be found in the System settings tab in the Project
view (including sample values)
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 …512
l MW : 1…512
l MD : 1…256
The values from the input field will be automatically converted to MB marker bytes.
Retention bytes
The entire retentive marker range for an easyE4 must not exceed 400 bytes. The total of
the retention bytes for the main program and user function blocks (UF) will be displayed
in the Project view, in the System settings tab. If the retentive marker range exceeds
400 bytes, a red negative number will be shown in the Free field in order to indicate this.
Retain retention during transfer
Retentive actual values on the device are deleted:
l By any program change in the circuit diagram or function block diagram followed by
its transfer to the device.
l When the program is deleted via Communication View, Program, Delete.
l By any change of the retentive range via the Project view, System settings, Reten-
tion.
l By any changes to the parameters for the remote markers of a visualization device.
l When the program is deleted with the Communication -> Delete device button
The following exception applies to retentive markers:
438
easyE4 11/18 MN050009 EN www.eaton.com
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