PLC Program Example today we would like to present in logical anti-chain requires the operator to place his hands on the input device at the same time, and not until the condition is safe to remove by hand. In the case of a rotary table index, the operator must remain in the hands Opto touch buttons before the table index released a complete index and stop motion. If the operator releases the hand before the move is complete, you should stop the table index.

Operators’ get your hands on Opto Touch buttons at the same time is a safety issue. If a false entry in one of the buttons was warned, then the only input to start the machine cycle. Some past causes a false entry conditions may be a tissue over a button opto. It ‘true that optical technology is now well advanced, and this situation is unlikely. However, these types of considerations must be false entry with regard to its logic can be written Prevent false starts the cycle and prevent the possibility of injury. (more…)

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