Emerson VE3007-12P4375X012-0022E521A594-KJ2005X1-BA1
DP主控级2用于工程和配置。它不与从属设备进行循环数据传输。通常,DPM2仅临时连接到总线。DPM2可以在经由DPM1配置从设备并且循环通信是活动的之前具有到从设备的类2通信。系统行为对于DPM1主设备,定义了以下操作状态:停止DPM1和从设备之间的无数据通信。清除DPM1读取从机的输入信息,并将从机的输出保持在故障安全状态(“0”输出)。操作DPM1处于数据传输阶段。在循环数据通信中,从机输入为红色,输出信息写入从机。
The DP master class 2 is used for engineering and configuration. It does not have cyclic data transmission with the slave devices. Normally a DPM2 is only connected temporarily to the bus. A DPM2 can have class 2 communication to the slave devices before the slaves are configured via DPM1 and cyclic communication is active.System Behavior For a DPM1 master the following operating states are defined: Stop No data communication between the DPM1 and the slaves.Clear The DPM1 reads the input information of the slaves and keeps the outputs of the slavs in a fail-safe state (“0” output). Operate The DPM1 is in the data transfer phase. In cyclic data communication, inputs are red from the slaves and output information written to the slaves.
可编程序控制系统配置了彩色图形工作站/屏幕监视,但从价格及反映现场状态的时间来看,屏幕监视尚不方便。关键的故障,或者在关键的机械设备附近,可配置一些指示灯,它们可以用数字量输出做成,用来监视程序的正常运行,或用来调试程序,在指示灯旁配以功能标牌,可帮助操作人员确认可编程序控制系统的正常运行和及时反映故障。 对于设计的新系统,硬件上至少要保留15%左右的冗余,在软件编制时,同样要估计用户软件对计算机资源的需要与用量。尤其对中间继电器,计数器/定时器的使用,要留有余地。因为在调试和运行后,软件总会被修改、补充,甚至重新编制。已编制的软件让人无法修改和完善,在工程上是不实际的。
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Emerson VE3007-12P4375X012-0022E521A594-KJ2005X1-BA1