Programmable Logic Controller (PLC) 

Definition

Underlying realtime system controlling the physical transportation of HUs on conveyor systems and their components.

Use

The PLC evaluates signals from the connected automatic storage retrieval/conveyor system or other controls and activates or deactivates motors, appliances, sensors, readers, and so on.

Each control that is to communicate with the EWM system must be defined as a PLC.

In larger installations, head controls may be in use, which for their part regulate local controls. The EWM system communicates with the head controls only. In EWM, you therefore define just the head controls.

At least one communication channel must be defined for each PLC.