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Koyo DirectNET protocol is used by DirectLOGIC PLCs from Automation Direct and is used in APS vacuum controls since 1999. It is a master/slave protocol making use of RS-232 or RS-422 physical layers with a baud rate from 300 to 38,400. It is designed to drive a maximum of 90 PLCs on a serial line.
DirectLOGIC is a range of programmable logic controllers produced by Koyo. They are programmed using DirectSOFT via: RS-232; USB port with USB-to-Serial adapter; 10BASE-T or 10/100 Ethernet network card
DirectNet – Koyo / Automation Direct proprietary, yet documented PLC interface; EtherCAT; Ethernet Global Data (EGD) – GE Fanuc PLCs (see also SRTP) EtherNet/IP – IP stands for "Industrial Protocol". An implementation of CIP, originally created by Rockwell Automation
Koyo Electronics (Kōyō Denki) and its subsidiary Koyo Electronics Industry (Kōyō Denshi Kōgyō), often collectively referred to as just Koyo, are Japanese electronics companies based in Kodaira, Tokyo [2] that manufactured radios from 1955 until 1973, and now its subsidiary manufactures industrial electronics devices and factory automation control systems.
Computers had already been applied to process automation for some time in the form of both direct digital control (DDC) and setpoint control. In the early 1970s Taylor Instrument Company , (now part of ABB) developed the 1010 system, Foxboro the FOX1 system, Fisher Controls the DC 2 system and Bailey Controls the 1055 systems.
Some government webpages briefly went dark Friday after federal agencies were told to comply with a White House order on removing certain language pertaining to diversity, equity and inclusion.
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