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VDI4377模塊PLC工控卡件庫(kù)存

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VDI4377模塊PLC工控卡件庫(kù)存 VDI4377模塊PLC工控卡件庫(kù)存 VDI4377模塊PLC工控卡件庫(kù)存
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主營(yíng)DCS控制系統(tǒng)備件,PLC系統(tǒng)備件及機(jī)器人系統(tǒng)備件,
優(yōu)勢(shì)品牌:Allen Bradley、BentlyNevada、ABB、Emerson Ovation、Honeywell DCS、Rockwell ICS Triplex、FOXBORO、Schneider PLC、GE Fanuc、Motorola、HIMA、TRICONEX、Prosoft等各種進(jìn)口工業(yè)零部件

VDI4377模塊PLC工控卡件庫(kù)存 VDI4377模塊PLC工控卡件庫(kù)存 VDI4377模塊PLC工控卡件庫(kù)存
UN200 CPU在執(zhí)行HSC指令前,首先要檢查與每個(gè)高速計(jì)數(shù)器相關(guān)的控制字節(jié),在控制字節(jié)中設(shè)置了啟動(dòng)輸入信號(hào)和復(fù)位輸入信號(hào)的有效電平,正交計(jì)數(shù)器的計(jì)數(shù)倍率,計(jì)數(shù)方向采用內(nèi)部控制的有效電平,是否允許改變計(jì)數(shù)方向,是否允許更新設(shè)定值,是否允許更新當(dāng)前值,以及是否允許執(zhí)行高速計(jì)數(shù)指令。

說(shuō)明:
(1) 在高速計(jì)數(shù)器的12種工作模式中,模式0、模式3、模式6和模式9,是既無(wú)
啟動(dòng)輸入,又無(wú)復(fù)位輸入的計(jì)數(shù)器,在模式1、模式4、模式7和模式10中,是只有復(fù)位輸入,而沒(méi)有啟動(dòng)輸入的計(jì)數(shù)器;在模式2、模式5、模式8和模式11中,是既有啟動(dòng)輸入,又有復(fù)位輸入的計(jì)數(shù)器。
(2) 當(dāng)啟動(dòng)輸入有效時(shí),允許計(jì)數(shù)器計(jì)數(shù);當(dāng)啟動(dòng)輸入無(wú)效時(shí),計(jì)數(shù)器的當(dāng)前值保
持不變;當(dāng)復(fù)位輸入有效時(shí),將計(jì)數(shù)器的當(dāng)前值寄存器清零;當(dāng)啟動(dòng)輸入無(wú)效,而復(fù)位輸入有效時(shí),則忽略復(fù)位的影響,計(jì)數(shù)器的當(dāng)前值保持不變;當(dāng)復(fù)位輸入保持有效,啟動(dòng)輸入變?yōu)橛行r(shí),則將計(jì)數(shù)器的當(dāng)前值寄存器清零。
(3) 在UN200 CPU中,系統(tǒng)默認(rèn)的復(fù)位輸入和啟動(dòng)輸入均為高電平有效,正交計(jì)數(shù)器為4倍頻,如果想改變系統(tǒng)的默認(rèn)設(shè)置,需要設(shè)置如上表中的特殊繼電器的第0,1,2位。
各個(gè)高速計(jì)數(shù)器的計(jì)數(shù)方向的控制,設(shè)定值和當(dāng)前值的控制和執(zhí)行高速計(jì)數(shù)的控制,是由表4-22中各個(gè)相關(guān)控制字節(jié)的第3位至第7位決定的。
6.高速計(jì)數(shù)器的當(dāng)前值寄存器和設(shè)定值寄存器
每個(gè)高速計(jì)數(shù)器都有1個(gè)32位的經(jīng)過(guò)值寄存器HC0-HC5,同時(shí)每個(gè)高速計(jì)數(shù)器還有1個(gè)32位的當(dāng)前值寄存器和1個(gè)32位的設(shè)定值寄存器,當(dāng)前值和設(shè)定值都是有符號(hào)的整數(shù)。為了向高速計(jì)數(shù)器裝入新的當(dāng)前值和設(shè)定值,必須先將當(dāng)前值和設(shè)定值以雙字的數(shù)據(jù)類型裝入如表所列的特殊寄存器中。然后執(zhí)行HSC指令,才能將新的值傳送給高速計(jì)數(shù)器。

7.高速計(jì)數(shù)器的初始化
由于高速計(jì)數(shù)器的HDEF指令在進(jìn)入RUN模式后只能執(zhí)行1次,為了減少程序運(yùn)行時(shí)間優(yōu)化程序結(jié)構(gòu)to uniformly manage and control a field device respectively, and tac6000 as the slave device to collect the field I / O points. The console is equipped with two industrial computers and one printer. An industrial computer as the host is responsible for communication with PLC and database management; Another industrial computer, as a slave, can communicate with the host to display the monitoring screen, and is connected with the printer to print reports and data history curves. The industrial computer monitors the site by using configuration software and its related components.




As shown in Figure 1, the industrial control computer and the on-site main control module form a LAN through Ethernet switch. Each industrial control computer is equipped with two network cards. Combined with software, network redundancy is realized to ensure the reliability of network communication. Pec8000 and pec3000 modules can freely communicate with various on-site protocol