31.1 Controlling External I/O

To control external I/O in a logic program, map addresses (variables) to I/O terminals. You need to identify which addresses (variables) send outputs, and which addresses (variables) read inputs. Setup procedures vary depending on whether you use the built-in I/O terminals for the display unit, or I/O terminals in an external unit.

When using the built-in I/O terminal

Setting Procedure

  1. Set up I/O Driver. Once the model is selected, I/O Driver is automatically set up.

  2. Map addresses (variables) to I/O terminals.

When using an external I/O unit

Setting Procedure

  1. Set up I/O Driver. Once the model is selected, I/O Driver is automatically set up.

  2. Specify the model of the external I/O unit.

  3. Map addresses (variables) to I/O terminals.