S&A Teyu CW-7900 Industrial water chiller units ndi 30000W kuzirala mphamvu, angapo alamu ntchito, thandizo Modbus-485 kulankhulana protocol, amene angathe kuzindikira kulankhulana pakati pa laser dongosolo ndi angapo madzi chillers kukwaniritsa ntchito ziwiri: kuwunika mmene ntchito chillers ndi kusintha magawo a chillers.