dl-breadcrumbs__homedl-breadcrumb-item__separatorConfiguration and programmingdl-breadcrumb-item__separatorProgramming with CODESYSdl-breadcrumb-item__separator...dl-breadcrumb-item__separatorFieldbus Supportdl-breadcrumb-item__separatorSymbolic Access to I/O Channelsdl-breadcrumb-item__separatorEnable automatic mapping
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Enable automatic mapping

  1. In the Devices view, open the top device. In the device editor, select the PLC Settings tab.

    Under Additional Settings, there is the Enable symbolic access for I/Os option.

  2. Select the check box.

    The generated function block instance is displayed on the IEC Objects tab of the device.

    For each I/O channel, a (usually extended) function block is now automatically created and instantiated. This provides you with direct access immediately. You can access the I/O channel by means of the variables of the function block.

Example: EtherCAT Slave

The new function block extends the existing function block. The EL1008 function block instance is listed in the device editor below the EtherCAT IEC Objects tab.

Function block: EL1008_FB

The DrvEthercatLib.ETCSlave_Diag function block is extended to EL1008_FB and gets the output variables Input_<n>.

Example: Device without a defined basic block

If no function block is defined in the device description which can be extended, then a new function block is generated. For example, the Generic_XN1AI function block instance is listed in the device editor below the IEC Objects tab.

Example: CANopen

The BK5120_FB function block, which extends the existing _3SCOS.CANRemoteDevice function block according to the device description, is generated. The BK5120 function block instance is listed in the device editor on the CANopen IEC Objects tab.