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Structured text, abbreviated as ST or STX, is one of the five languages supported by the IEC 61131-3 standard, designed for programmable logic controllers (PLCs). [1] [2] It is a high level language that is block structured and syntactically resembles Pascal, on which it is based. [3]
Function Block Diagram is one of five languages for logic or control configuration [2] supported by standard IEC 61131-3 for a control system such as a programmable logic controller (PLC) or a Distributed Control System (DCS). The other supported languages are ladder logic, sequential function chart, structured text, and instruction list.
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.
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)
Note: In this example, "Run" represents the status of a bit in the PLC, while "Motor" represents the actual output to the real-world relay that closes the motor's real-world circuit. For safety reasons, an emergency stop ("ES") may be hardwired in series with the "Start" switch, and the relay logic should reflect this.
HostLink [1] is communication protocol for use with or between PLC's made by Omron.It is an ASCII-based protocol generally used for communication over RS-232 or RS-422.The protocol enables communication between various pieces of equipment in an industrial environment for programming or controlling those pieces of equipment.
For example, they noted that these drone flights were coordinated and flew in swarms, and were airborne for 6 to 7 hours — which officials said was “extraordinary” battery life, Kanitra said
Jürgen Kaftan: "Practical Examples with AC500 from ABB: 45 Exercises and Solution programmed with CoDeSys Software". IKH Didactic Systems ISBN 978-3943211061; Tom Mejer Antonsen: "PLC Controls with Structured Text (ST): IEC 61131-3 and best practice ST programming", ISBN 978-87-4301-855-1 (further languages available)
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