Toyota Jidosha Kabushiki Kaisha

Toyoda Koki Kabushiki Kaisha

Fuyuhiko Yoshikura

Teiji Uno

Minoru Enomoto

Masashi Ito

Fumio Sakamoto

Yasuhiro Okada

Noritaka Ise

Shoji Inagaki

A programmable controller (PC) for controlling equipments in accordance with a sequence program. A program memory is provided with an equipment code storage region for storing global equipment codes for indicating the equipments each of which is allotted an individual I/O address. When an equipment code is input, an equipment code interpreter determines the local I/O address which corresponds to the equipment code. The equipment code is composed of a PC number code, an equipment type code, an equipment number code and the like. The equipment code is displayed together with the sequence program.

Programmable controller

A clamping device which holds a workpiece at a predetermined position during a machining operation of the workpiece comprises a clamper for clamping a workpiece, a feed device for moving the clamper in the axial direction, a load sensor which is fixed to the clamper and detects a clamping force acting on the workpiece, and a memory in which a target clamping force corresponding to the shape of the workpiece and a method of machining operation is stored. The control device compares the clamping force detected by the load sensor with the target clamping force stored in the memory and controls the clamper in response to the deviation between the detected clamping force and the target clamping force. The clamping device also has a position detecting means for detecting the axial position of the clamper. The control device compares the present position detected by the position detecting means with a stop position which is detected during the initial clamping and is stored in the memory, and controls the clamper in proportion to the deviation between the detected position and the stored stop position.

Device for clamping a workpiece

A programmable control system for controlling a multiplicity of equipments by a plurality of programmable controllers (PC's) in parallel. Each PC is provided with a program linkage condition memory. The linkage conditions are the conditions for linking sequence programs to each other which are stored in the respective programmable controllers at the time of reading out the sequence programs in series. When a predetermined read command is issued, the sequence programs stored in the respective PC's are successively read out in accordance with the linkage conditions and are displayed on a display unit.

Programmable control system

A programmable control comprising a plurality of programmable controllers (PC's) for executing parallel control. Each PC is provided with a link control table for storing the numbers of the PC's to which link data such as interlock information is supplied. In each PC, a link data file in which link data to be required are listed is created. The link data file is circulated to each PC. Each PC creates a link control table in accordance with the contents of the received link data file.

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Nagoya, Japan

Fuyuhiko Yoshikura