Software - PLC Process Control & Automation Systems
Assuming suitable hardware selection, PLC
software is arguably the most important aspect of any PLC
based process control or automation system. No longer is PLC
software limited to simple binary and sequence logic. PLC software
can now be used to control the majority of automated industrial
systems. From the binary sequential logic used in today s high
speed packaging machines, through continuous PID control for
process applications, to motion control for pick and place robots,
the applications are endless.
Today, with the correct PLC hardware, PLC
software can be written for implementation into a more diverse
range of industries than ever before.
As the various applications for PLC systems have grown, new
PLC programming languages have been developed to provide the
facility to construct PLC software in the language best suited
to the application. The IEC standard IEC 61131-3, released in
1993, has now been adopted by most mainstream PLC vendors resulting
in a set of 5 languages, each sharing similar, cross vendor syntax.
The PLC programming languages defined by 61131-3 are ladder diagram
(LD), sequential function chart (SFC), function block diagram
(FBD), structured text (ST) and instruction list (IL).
As all PLC software functions are not available in all of
the programming languages it is critical that software engineers
have a firm grasp of the limitations of each and select the most
suitable language for the application.
At InControl Systems, all of our systems engineers complement
there knowledge of IEC 61131-3 with many years of software production
experience. Our quality systems ensure that PLC software produced
by InControl Systems adheres to strict guidelines, particularly
with respect to revision levels and comprehensive annotation.
Whatever your PLC software needs, InControl Systems are confident
that the quality and functionality of our software can not be
beaten.
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