SCADA

What is SCADA? This is a bit better - it's lots of pretty graphics with a useful purpose. The graphics display parts of the plant for the operators who run them. SCADA systems produce alarms telling the operator to fix a problem. Here's a very simple example : So who uses these things? Again they are used to in Water, Electricity, food and pretty much everything in process control industries. Back to Top

What is Ladder? It's crude simple stuff, here's an example: Segment 2 Air bad delay timer ! T 116 !I 19.1 +-----+ +---] [---+-!T!-!0! !KT 060.2 --!TV BI!- ! ! DE!- ! ! ! ! ! ! ! +-!R Q!- ! +-----+ This is a time delay - when the input "I19.1" is on then the timer T116 start. When it expires the timer output Q is activated. Timers are used a lot in PLC programs - to delay starting a pump until the 'low level' probe has been active for 10 seconds say (to avoid spurious signals) or simply to time how long a pump has been running for. Another example: Segment 3 F49:Compressed Air missing ! !I 19.1 F 18.2 F 26.0 +---]/[---+---]/[---+---------+---------+---------+---------+---------+--( )-! ! ! !F 26.0 ! +---] [---+ Nowadays the ladder editor is in Windows type format, but the principle is still the same... Back to Top

Our Software We program in all PLC languages, examples being: Siemens S7-200 Siemens S7-300 Siemens S7-400 Siemens S5-100 Series (including 90,95) Siemens S5-115 Series Siemens S5-135 Series Siemens S5-155 Series Siemens S7-200 Series Siemens S7-300 Series Siemens S7-400 Series Allen Bradley MicroLogix Allen Bradley PLC 2 Allen Bradley PLC 3 Allen Bradley PLC 5 Allen Bradley SLC 500 series Allen Bradley ControlLogix Allen Bradley FlexLogix Allen Bradley CompactLogix Mitsubishi F series Mitsubishi A1 series Mitsubishi A1 series Mitsubishi A3 series Mitsubishi FX series Mitsubishi F1 series Mitsubishi F2 series Telemechanique Omron Seprol Toshiba Satt Cutler Hammer Square-D We also program in Visual BASIC, PASCAL, C and C++ often to link to the PLCs and SCADA system. Our experience in writing complex communication drivers is second to none.