polled

1. 查询：State)、选通(Strobed)、查询(Polled)等. 循环方式适用于一些模拟设备,可以根据设备的信号发生的速度,灵活设定循环进行数据通讯的时间间隔,这样就可以大大降低对网络的带宽要求. 状态改变方式用于离散的设备,使用事件触发方式,

2. 轮询：数据获得(Data acquisition) 数据获得关心的是从远程PLC读取变量值,读取变量值的方法有两种: 1.轮询(Polled): READ功能块能周期性地或在特定触发器条件下读取被选变量的值.

1. The " 2006 China Business Report " was released yesterday after the organization polled 274 member companies throughout China.

2. Of the men polled, 11 said they had experienced indecent assaults such as rubbing of the buttocks.

3. An online poll conducted by the Shanghai environment authority showed that 90 percent of those polled supported the new rule.

4. Eight out of the 46 polled named it as their most important or second most important online activity.

5. All but three of 29 polled have " Buy " or " Overweight " ratings on CCB, the world's No 2 lender by market cap.

6. About 21 percent of those polled by CCTV said they seldom donated to charity, even though 56 percent did so once a year.

7. polled

7. Only 27 percent of the people polled were acquainted with this system, and were able to tell a diamond's quality from its certificate.

8. Only 30 percent of those polled said they work 40 hours a week, the statutory working hours stipulated by Chinese law.

9. Gu said he was happy to see that a majority of the high school students polled said they wanted to retain their Chinese nationality.

10. About 85 percent of those polled said they were not surprised by Drogba's departure because the CSL could not compete with the big European leagues.