CI840A Profibus 通讯接口模块使用说明

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依据该操作画面实施机组切换的过程如下：
1、首先把备风机组投入主风性能控制防喘阀及静叶；
2、然后把主风机组投入主风性能控制防喘阀及静叶；
3、后在主备机切机画面中投入主机切系统功能；
4、主风机组根据总管流量关小防喘阀，备风机组自动逐渐根据总管流量打开防喘阀。
5、直至备风机组出口单向阀关闭或者程序自动指示备机切出装置。
6、HMI自动弹出主备机切机完成指示，操作工首先点击取消切机，然后操作工需要到现场把备风机组出口电动阀手动关闭，后手动可以把备风机切入安全运行状态。

The process of unit switching according to the operation screen is as follows:

1. First, put the standby air unit into the main air performance control anti surge valve and stationary blade;

2. Then put the main air unit into the main air performance control anti surge valve and stationary blade;

3. Finally, put the function of main machine switching system into the screen of main and standby machine switching;

4. The main air unit turns down the anti surge valve according to the flow of the main pipe, and the standby air unit automatically and gradually opens the anti surge valve according to the flow of the main pipe.

5. Until the one-way valve at the outlet of the standby fan unit is closed or the program automatically instructs the standby fan to cut out the device.

6. HMI will automatically pop up the completion instruction of cutting off the main and standby fan. The operator first clicks to cancel the cutting off, then the operator needs to go to the site to manually close the electric valve at the outlet of the standby fan unit, and finally manually switch the standby fan into the safe operation state.