Nowadays all software is, of course, Windows based. From the top level, for example, Edit mode is selected by key then Append by then the instruction type selected by one of the keys shown. This is based on a “tree” driven by the ten function keys. A typical example is the Allen Bradley DOS based AI Series software shown in Figure 2.69. It is quite feasible to run DOS programming software on a 286 machine with a 20 MByte hard drive. DOS based software is simple, fast, robust and does not put heavy demands on the processor. Being large and heavy they are much less attractive to thieves.Įarly versions of PC based software ran under MSDOS, and many still do. A ruggedized industrial ‘luggable’ will accept internal ISA or PCI cards and run on any supply voltage. Batteries tend to go flat just when they are needed! Notebooks are also very easy to steal. They, can, of course, run on batteries but only for a limited time. The power supplies on many notebooks will also only operate on 240 V, not the 55/055 sockets found on site in industry. The author does not like small notebook computers they are not very robust, and, because of their small size, you end up with external power supplies and PCMCIAįigure 2.68 Sequential Function Chart (SFC) programming with Rockwell ControlLogix softwareĭevices hanging about outside it. The programming terminal will have a hard life and care should be taken to ensure it is sufficiently rugged. #WINDLDR PROGRAMMING SOFTWARE: FULL VERSION SOFTWARE DRIVER#Where the PLC and PC communicate via a multi-station network some form of driver is required either as an internal card in a spare PCI or ISA slot or via an external device plugged into the PCMCIA port. Often the link to the PLC is via a simple standard RS232 point-to-point link using COM1. #WINDLDR PROGRAMMING SOFTWARE: FULL VERSION SOFTWARE PORTABLE#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.
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