Storing Force Values onto SD Memory Card

The force values can be written onto a SD memory card to reactivate them after a loss of power supply voltage. A precondition for storing is that a SD memory card is plugged into the CPU.

For storing the force values, there is no need for a special program. It is performed automatically if the respective options are configured in the IEC 61131-3 editor project.

  1. In the IEC 61131-3 editor open the Resources tab. Then, open the Target Settings.

  2. In the General tab, activate the check boxes Retain forcing and Save.

  3. Compile the project and store it to the flash memory of the CPU (use Create boot project).

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    The current force values are stored onto the SD memory card at every forcing and a warning message is displayed with every logout from the PLC. To keep the forced values, confirm this message with No.

After a loss of power supply voltage, the values are read from the SD memory card automatically and the forcing is activated.

Note

The force values are only deleted from the SD memory card by deactivation of the forcing function.