Rockwell Automation Technologies Incorporated

Allen-Bradley Company, LLC

Rockwell Technologies, Inc.

Makoto Shichi

Anthony Gerard Gibart

Dennis G Schneider

Dennis M Wright

Mamabu Hayakawa

An input/output (I/O) module has a programmable memory having a first memory address for receiving a module number and a second memory address for receiving a signal direction indicator. The I/O module is for use with a programmable controller system having a master controller serially connected to a plurality of I/O modules. The I/O module has a signal line operatively coupled with the memory. The signal line has a pair of inputs. Both inputs are configured and adapted for receiving a module number signal across a line connected therewith. The other one of the inputs will then propagate the module number signal downstream. A logic circuit sets the second memory address with the signal direction indicator corresponding to the module number signal being received by a particular one of the inputs.

System having I/O module number assignment utilizing module number signal line having pair of inputs adapted for receiving module number signal and propagation of module number signal down stream

A programmable controller system is provided having an input/output (I/O) module number assignment routine. The system includes a master controller and a plurality of I/O modules operatively connected thereto. The I/O modules form at least two banks. An individual module number is assigned to each of the plurality of I/O modules based on a successive position of each I/O module relative to the master controller and based on the I/O modules of each bank being numbered in succession in a predetermined direction through each bank.

Programmable logic controller system and method for module number assignment

The present invention provides a switching device incorporating a simple circuit capable of avoiding the flash-on of a transistor when a power supply is turned on and off thereby reducing the OFF delay time. The output circuit comprises a FET (145) having a drain and a source connected in series to a current line for supplying a current from a power supply (VD) to an output detector (load) (L), and a photocoupler (149) for applying a driving voltage across the gate and the source of the FET (145) according to the output of an internal circuit (151), a differentiation circuit comprising a capacitor (7) and resistors (5,9) is connected across the drain and the source of the FET (145), and second transistor (3) having a collector and an emitter connected to the gate and the soruce of the FET (145) is driven by a charging current for charging the capacitor (7). When a voltage applied across the drain and the source of the FET (145) starts rising, the second transistor (3) is turned on to turn off the FET (145) forcibly.

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Kariya, Japan

Makoto Shichi