This article narrated Simens S7-200H PLC in the petroleum drilling machine frequency conversion transmission system's application characteristic, has given a model application disposition, and to actual should have the situation to make the analysis appraisal. S7-200 the series PLC main feature is: Extremely high processing speed, formidable communication performance and remarkable CPU resources allowance. Especially qualify in high performance large-scale system.
key word: Simens PLC petroleum drilling machine frequency conversion transmission system
