This chart illustrates two types of component-level add-ons, added to the minimal reactive system ..., as follows:
On the operator side, the On-Off push button, which does not provide feedback about the actual mode, is replace by an On-Off switch, with clear feedback about the effective mode
On the machine side, two LEDs are added to indicate the actual machine state.
These component add-ons are used to facilitate the operator's orientation in case of coordination failure.
Updated on 20 Jul 2016.