主要针对恒流起动方式进行了软件设计，采用了九点控制思想。
We adopt nine-point control theory to design software which is mostly fit for limiting current start mode.
着重介绍了PLC在高压离心风机上的应用，设计了风机起动和运行的PLC硬件和软件。系统具有高可靠性。
This article emphatically introduce PLC application on the high pressure centrifugal blower. It's software and hardware are designed for start and operation of blower. It has high reliability.
介绍一种可编程硬件电路的工作原理和软件编程，实现柔性起动。
The working principle and software programming of the programmable hardware circuit which can realize flexibility starting are presented.
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