![]() The Allen Bradley keypad shown earlier in Figure 1.14 is typical.Īs portable computers became cheaper and more readily available, manufacturers moved to providing software which can run on a standard portable PC. Originally PLC manufacturers provided dedicated program terminals which were specific to their PLCs. It is to be hoped it doesn’t act as a brake on design ingenuity and inhibit development. The end user if programming terminals presented a common face regardless of the connected machine. 8.6 Electromagnetic compatibility (EMC) and CE markingįigure 2.67 Structured Text (ST) programming with Rockwell ControlLogix software.8.5.2 Statistical representation of reliability. ![]() ![]() 7 Industrial control with conventional computers.6.6.3 Pixel graphics the CEGELEC Imagem.6.2 Simple digital control and indicators.5.6 Safety and practical considerations.4.4.4 Channel selection and conversion to engineering units.4 Analog signals, closed loop control and intelligent modules.3.5 Housekeeping and good software practice.2.3 Identification of input/output and bit addresses.1.3.5 Requirements for industrial control.1.3.2 Machine code and assembly language programming.
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