Encoder in program

All that is marked green is what is used for the encoder on the Wago 750-431 module. This must be taken into account when creating a program that will be able to run and receive values ​​from the encoder.

Signal input:

• The encoder sends information about the position it measures by using several digital signals. The signals tell something about its position in a form of code called gray code.

Conversion of Signal:

• These gray codes are received by the system and converted to standard numerical form, making it much easier to understand. After this, this information can be used later.

Position adjustment:

• When the gray code has been converted into a number, it is adjusted by the system to better fit the needs of the system, this is called scaling and adjusting.

Control system:

• The position value that has now been adjusted is used by the system to control machines or other components in a correct and accurate way. It is compared with the position a component already has, with the desired position, and can now adjust as needed to achieve the desired position.

Feedback and Action:

• The system takes measures to correct the position depending on the desired position and the actual position of a component. This means that the system can move a part in the desired direction to get to the correct position.

How to connect:

After you have connected to the PLC, you have to see which modules appear in the codesys program. The encoder must then be connected to one of these modules, this can be seen by testing the system physically, so that you can see which inputs react to the movements of the encoder. Once you have found this out, you must take this into account when defining the variables, because the variables must be connected to the correct input on the module. You must later also enter the variables in the variable list as shown in the picture. Then you must only use the inputs that are actually connected to the encoder.