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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
DF-1 - used by Allen-Bradley ControlLogix, CompactLogix, PLC-5, SLC-500, and MicroLogix class devices; DNP3 - a protocol used to communicate by industrial control and utility SCADA systems; DirectNet – Koyo / Automation Direct proprietary, yet documented PLC interface; EtherCAT; Ethernet Global Data (EGD) – GE Fanuc PLCs (see also SRTP)
Their first product was a vacuum tube radio released in 1955, [3] [4] and their first transistor radio was the KR-6TS-1 radio released in the spring of 1957 [5] [6] at the price of 14,000 yen. [7] Through the 1960s, Koyo had manufactured and sold millions of portable transistor radios, particularly, their best-selling model KTR-624 had been ...
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.
A programmable logic controller (PLC) or programmable controller is an industrial computer that has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, machines, robotic devices, or any activity that requires high reliability, ease of programming, and process fault diagnosis.
Level 2 data displays the best bid and ask prices (also known as "top-of-book") for each market participant in a given security. In other words, at a given time there may be several market makers participating in trade matching for a specific stock. Level 2 data will display the highest bid and lowest ask for each individual market maker.
With the increasing speed of today's processors, many DCS products have a full line of PLC-like subsystems that weren't offered when they were initially developed. In 1993, with the release of IEC-1131, later to become IEC-61131-3, the industry moved towards increased code standardization with reusable, hardware-independent control software.
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