Management of output variables

The PLC Output variables are clearly declared when configuring the I/O HW devices.The HW devices configured are automatically managed by the Gefran PLC which envisages the cyclic update of the Inputs and Outputs.The I/O management of the HW devices configured, whether installed on local bus or acquired through a fieldbus, is activated after running the INIT task when starting the user application program.This condition enables the user to determine the first value used for the output variables which will otherwise be the default value, which for all non-retentive values is 0.