1756-IB16 用心服务,信誉为本 17750668118
1756-IB16 用心服务,信誉为本 17750668118
1756-IB16 用心服务,信誉为本 17750668118
PID 值设定
全部的温度,压力,流量控制总是经由PLC的软件程序撰写来处理PID控制值.
P为比率(单位=百分比(%)),为调整安定/隐定度.
I为绩分(单位=秒),为调整反应/灵敏度.
D为微分(单位=秒),为调整误差量补偿度.
PID值可以是预设在SCADA工作站,这个PID值有必须是储存经由工程师调整后直接地设定或者经由软件自动调整然后的设定值.
PID的调整将实现这机器的安定或准确度,它有时候必须用长时间的观察和调整来精确地完成期待的性能.
DCS控制系统的异常警报功能
DCS系统所控制的机器操作人员,将有良好的机械信息来关切这台机器,例如有关机械的润滑系统,水,油,过滤网等等,重要的事件将被显示在屏幕上.异常事件的分类及警报必定得告知操作人员和出现于警报的窗体.经由操作人员或维修工程师来作事件确认.
当DCS系统是处于正常的工作状况,SCADA将继续核对全部有连结的装备看是否有超过原来的设定上限或者低限,经由一个设订好的程序,假如有任何讯号回馈不正常,它将给一个警告的警报.
经过PLC和网络,SCADA将不断的扫瞄每一个马达及其它控制设备,看是否有任何异常的警报或故障/失败的状况.假如读回的数值比对后是异常的,系统将自动引发异常事件警报功能.
DCS控制纟统的三层次的异常
层次 1 :这种异常需要直接的及快速的行动,将自动地停止机器运转,譬如当一个马达驱动器是故障的时侯.
层次 2 :这种异常能保持一个短的周期不须中止这台机器运转,譬如当一个马达是过热的时侯.
层次 3 :这种异常一般为通知操作人员当停止这台机器时须作修理或者保养,但是不需要中止这台机器的运转,譬如润滑油或过滤器是超过使用的时限.
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CHESTERTON 049974 714 SEAL-24 SHAFT-3.0 CR
GATES RUBBER CO. 83744/6C2-12FDL?X90 MALE STEM VALVE (LO
PANASonIC M9GE12.5B-CB GEAR HEAD
PANASonIC M9GC3.6B7 GEAR HEAD
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EFECTOR W80172 RIGHT ANGLE CONNECTOR
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