1746-NI8產(chǎn)品說(shuō)明:
公司名稱(chēng):廈門(mén)卡庫(kù)電氣有限公司
詢(xún)價(jià)熱線:0592-5709823
聯(lián)系人:嚴(yán)小姐
QQ:1093230189
傳真:0592-5709828
機(jī)身控制箱和機(jī)身電磁閥接線盒分別各配置1個(gè)PLC主模塊。 4、主控制箱的主站PLC采用EC20-2012BTA主模塊(晶體管輸出),擴(kuò)展了2個(gè)EC20-4PT模塊(溫度測(cè)量)、2個(gè)EC20-4AD模塊(4-20mA模擬量測(cè)量);主控制箱的從站PLC采用2個(gè)EC20-2012BTA主模塊(晶體管輸出)。 5、機(jī)身控制箱從站PLC采用EC20-2012BRA主模塊(繼電器輸出),擴(kuò)展了1個(gè)EC20-4AD模塊(0-10VDC模擬量測(cè)量)。控制箱應(yīng)留出未來(lái)擴(kuò)展的空間,以便將來(lái)增加擴(kuò)展模塊。該控制箱上安裝1個(gè)無(wú)錫匯聯(lián)SLIAN的文本顯示屏,通訊線與PLC的通訊口0連接(RS-232)。 6、機(jī)身電磁閥接線盒從站PLC采用EC20-3232BRA主模塊(繼電器輸出)。 7、5個(gè)比例閥分別由主控制箱的3個(gè)PLC主模塊進(jìn)行控制。每個(gè)PLC主模塊可控制2個(gè)比例閥。 8、4臺(tái)變頻器和2個(gè)流量計(jì)都作為MODBUS從站,由主控制箱主站PLC進(jìn)行監(jiān)控。
工作原理說(shuō)明 人機(jī)交互通過(guò)PC實(shí)現(xiàn),PC可以實(shí)時(shí)監(jiān)控整個(gè)系統(tǒng)的工作運(yùn)行狀態(tài)、動(dòng)作過(guò)程及故障報(bào)警、實(shí)時(shí)曲線描繪和保存歷史數(shù)據(jù)等,同時(shí)可發(fā)送各種操作命令給PLC以控制系統(tǒng)的運(yùn)行。 在主站PLC與PC、從站PLC、變頻器和流量計(jì)儀表通訊方面,EC20 PLC充分利用自身的優(yōu)勢(shì),由于EC20 PLC本身帶有2個(gè)串行通信口(1個(gè)RS232口,集成自由協(xié)議/編程協(xié)議/MODBUS從站協(xié)議,1個(gè)RS232/485口,集成自由協(xié)議/MODBUS主站/從站協(xié)議),EC20 PLC利用COM0口和PC進(jìn)行通信(EC20 PLC做從站,設(shè)置成MODBUS從站協(xié)議),利用COM1和多臺(tái)從站PLC、變頻器和流量計(jì)儀表組成網(wǎng)絡(luò)進(jìn)行集中控制(EC20 PLC的COM1設(shè)置成MODBUS主站協(xié)議)。 艾默生變頻器自帶RS485接口的通訊單元,用于實(shí)現(xiàn)PLC與多臺(tái)變頻器的聯(lián)網(wǎng)。對(duì)變頻器的所有控制都通過(guò)RS485通訊鏈路來(lái)完成,可省去變頻器的外部起停控制線路。 5個(gè)比例閥控制器均由步進(jìn)電機(jī)及放大器組成,由主站PLC及2個(gè)從站PLC通過(guò)高速脈沖輸出口來(lái)進(jìn)行控制。 流量計(jì)儀表具有MODBUS協(xié)議,可由主站PLC通過(guò)MODBUS網(wǎng)絡(luò)訪問(wèn)和監(jiān)控。另外,流量計(jì)具有脈沖計(jì)數(shù)和頻率輸出,可用于計(jì)量,作為備用方案。脈沖輸出可以接入到EC20的高速輸入通道。
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