Upgrading performance while retaining legacy PLC code
March 2005
SCADA/HMI
The combination of CTI and Vipa gives Impala the familiarity of programming in the known CTI environment with cost effective I/O from Vipa. Interact IV undertook the installation on the new effluent treatment plant, and the software development was done in-house.
The TI505 series, which is a miniature version of the TI565 PLC, is advanced in its functionality. Features include automatic I/O determination in the field, comprehensive diagnostic features, memory and system management, pre-programmed alarms and PID loops with fill-in-the-block configuration faceplates. The instruction set includes loop_pack and alarm_pack instructions speeding up PLC/scada communications. This is all programmable in mnemonics with a basic type language in special functions with floating point maths capability - that can run as prioritised, cyclical, time-based - or event driven, allowing the parsing of parameters to other special functions and subroutines.
Control Technology and FastTrak Softworks, the original producer of 505 SoftShop (TI series programming software), elected to manufacture and launch four new CPUs: the 2500-C100 will replace the TI545-1105, 2500-C200 will replace the TI545-1106, 2500-C300 will replace the TI555-1105 and the 2500-C400 will replace the TI555-1106.
The diagram shows the control network implemented at Impala Platinum Refineries at Springs.
About Vipa
Vipa is an international leader known for its innovative development of state of the art PLCs. Vipa's Speed 7, purported to be the fastest PLC in the world, is a typical example of this.
The Vipa PLC range is aimed at offering affordable leading functionality that gives clients alternative solutions to forced migration paths from legacy systems to new technology. Vipa offers clients a choice to keep their existing PLC code with their existing PLC software. The company believes that this makes a lot of sense, as clients can choose to retain their engineering investment yet upgrade to new off the shelf available hardware, while benefiting from after sales service and support.
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