Fanuc 3051DG1A62A1AHR5B4E8M5Q4D4DF因而,每一次轮巡的最大通讯量为:
3584+3584+125*20=9668byte
9668/187500=5.15%
可见,操控网络即便在悉数测点依照最快扫描周期而且在极限传输量情况下,也处于十分闲暇情况。因而profibus-dp的负荷率彻底满足运用恳求。
(2) ethernet网络负荷剖析。ethernet 通讯选用tcp/ip协议,通讯有发送和承认操控。帧操控信息开支=12(帧距离)+8(同步码)+18(帧首、尾)+24(ip包首部)+24(tcp包首部)=86byte。由协议可知:
用户数据均匀包长=1452(最大用户数据包长)/2=726byte,则:
均匀用户数据运用率=用户数据均匀包长/(发送帧操控信息开支+承认帧操控信息开支+用户数据均匀包长)=726/(86+86+726)=80.85%
由上述剖析可知,此dcs体系可以满足安稳的操控恳求,硬件体系有较大的冗余量,可以保证体系的安稳性。
4、操控体系的功用完结
4.1 上煤道路的挑选
因为华祥热电有限公司的输煤皮带体系对比杂乱,首要体如今输煤皮带的上下级联络对比杂乱。体系由35条皮带构成,给三个单元的原煤仓上煤。例如有如下上煤道路:
一单元上煤道路:
(1) #0甲皮带→#5甲皮带→#7甲、乙皮带→犁煤器→煤仓。
(2) 推煤机→#0乙侧皮带(#1、#2轮斗机)→#8甲侧皮带→#2甲侧皮带→#1碎煤机→给料带回转→#3皮带→#5甲、乙侧皮带→#7甲、乙侧皮带→犁煤器→煤仓。
(3) 翻车机#1、#2给料带→#1甲、乙皮带→#2甲侧皮带→#1碎煤机→给料带回转→#3皮带→#5甲、乙侧皮带→#7甲、乙侧皮带→犁煤器→煤仓。
由上面的道路可知,体系的上煤道路较杂乱,所以咱们选用了首要挑选上煤结尾,按由后向前的次第挑选上煤道路,直到挑选上煤起点。别的,咱们也给出了几条最优的上煤道路,供用户进行便利敏捷的挑选。
4.2 手动与主动办法
体系的发动和中止办法可以为手动和主动办法。当在体系图上挑选运/配煤设备后、并接纳到相应的设备“预备好”信号;悉数指示标明可以发动时,操作人员通过体系发动指令来发动运/配煤体系。当不答应发动或所选设备无效时,内部连锁能避免任何设备发动。当“体系中止”指令输入键盘时,体系按正常铲除次第中止,或当呈现损害人身、设备时,体系应当即中止。主动办法为首要的作业办法,作业人员应能挑选一个完好和适宜的途径,以便将煤运送到煤仓。
4.3 连锁功用的完结
手动办法中,除了作业人员有必要依照精确次第通过键盘上的发动/中止指令来发动和中止各个设备,体系也应象主动办法一样彻底连锁。以保证作业人员按精确的次第来发动和中止悉数设备。发动上煤设备优先发动碎煤机,发动时按逆煤流方向,从终究一条皮带(及有关设备)开端一次发动。直到榜首条皮带(及有关设备)发动后才开端供煤;停运时按顺煤流方向,先停供煤设备,然后从榜首台至终究一台设备顺次中止,终究中止碎煤机作业。
4.4 主动加仓功用的完结
主动加仓功用首要是运用了功用块图和st(构造化文本)编写的程序来完结的。其间首要有对比逻辑、与逻辑、或逻辑,还有分支构造句子,通过现场作业,能按预订方针完结主动加仓功用。
厦门兴锐达自动化设备有限公司
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