In the service of beauty

Khim has specialized in technical building automation and HVAC (heating/ventilating/air conditioning) systems, whereby the focus is on energy controlling, savings, and networked systems. As the conversion had to be completed during operation – also at the weekends – one area after another was modernized according to the requirements of production. So after three months the heating in the production was completely converted.

There were several reasons for Khim to rely here on PLC engineering instead of on systems such as BACnet, KNX or LON which are usually used in building technology. PLC engineering can be found everywhere in the industry and there is staff there who are very familiar with it. Spare parts are in-house and the customer can mostly deal with faults or changes himself without any delay. In addition, the STEP7 compatibility, the interfaces to PROFIBUS, and the performance capability of the CPU to process and reliably store large amounts of data spoke for Yaskawa and their Vipa SPEED7 CPUs. All required interfaces are on board with  Vipa CPUs as standard, and the capacity is sufficient to process the 90 parameters which accrue per control module in this project.

Two CPUs 315SN-NET control the entire energy distribution – together with decentralized SLIO modules Two CPUs of the type 315-4NE12 Ethernet now control the right temperature of the entire building in Karlsruhe. 18 Vipa SLIO module units are connected decentralized over the entire factory on 4.5 km of Profibus cable, strengthened by repeaters. They control the energy distribution on-site and ensure that the return per consumption unit does not rise above the desired value – otherwise the amount is throttled.