Eaton easyE4

7. System settings
7.13 Retention function
Fig. 298: Retention section: Marker bytes 1 - 32 entered and display in marker double words after
another change to the System settings tab
Retention bytes
The entire retentive marker range for an easyE4 must not exceed a specific number
of bytes. Depending on the firmware installed on the basic device, the following num-
ber of available bytes applies here:
l
Firmware ≥ 2.00: 512 Bytes
l
Firmware < 2.00: 400 Bytes
The sum of the retentive markers of the main program and the retentive markers of
all user block instances (UF) is displayed in the project view on the System settings
tab. If the retentive marker range exceeds the number of available bytes, a red neg-
ative 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 with the Com-
munication/Program/Configuration/Delete device button
l
By any change of the retentive range via Project view/System settings/Retention.
l
By any changes to the parameters for the remote markers of a visualization
device.
l
When deleting the device from the workspace of the project view.
The following exception applies to retentive markers:
Marker contents
If this option is enabled, the contents of the existing retentive marker range will be
retained when the program is transferred. The ACTUAL marker values are retained.
In order for this to work, however, the marker range defined as being retentive must
remain unchanged.
Function block contents
If this option is enabled, the contents of the existing retentive operand range will be
retained when the program is transferred.
In order for this to work, however, the function block defined as being retentive must
remain unchanged.
easyE402/24 MN050009ENEaton.com
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