西門子觸摸屏MP277通訊網口壞修復解決

西門子MP277觸摸(mo)面板壞(huai)維(wei)(wei)(wei)修(xiu)(xiu)，MP277顯(xian)(xian)示(shi)白(bai)屏維(wei)(wei)(wei)修(xiu)(xiu)，MP277顯(xian)(xian)示(shi)進(jin)(jin)不(bu)(bu)去(qu)系統(tong)(tong)維(wei)(wei)(wei)修(xiu)(xiu)，MP277上(shang)電顯(xian)(xian)示(shi)白(bai)屏維(wei)(wei)(wei)修(xiu)(xiu)，MP277通電進(jin)(jin)不(bu)(bu)去(qu)操作系統(tong)(tong)維(wei)(wei)(wei)修(xiu)(xiu)。MP277黑屏無顯(xian)(xian)示(shi)維(wei)(wei)(wei)修(xiu)(xiu)，MP270按鍵(jian)失(shi)(shi)靈(ling)(ling)(ling)維(wei)(wei)(wei)修(xiu)(xiu)，MP277進(jin)(jin)不(bu)(bu)了(le)(le)系統(tong)(tong)維(wei)(wei)(wei)修(xiu)(xiu)，MP370通訊不(bu)(bu)上(shang)顯(xian)(xian)示(shi)#號(hao)維(wei)(wei)(wei)修(xiu)(xiu)，MP377黑屏無顯(xian)(xian)示(shi)維(wei)(wei)(wei)修(xiu)(xiu)，MP377按鍵(jian)失(shi)(shi)靈(ling)(ling)(ling)維(wei)(wei)(wei)修(xiu)(xiu)，MP277進(jin)(jin)不(bu)(bu)了(le)(le)系統(tong)(tong)維(wei)(wei)(wei)修(xiu)(xiu)，MP377通訊不(bu)(bu)上(shang)顯(xian)(xian)示(shi)#號(hao)維(wei)(wei)(wei)修(xiu)(xiu)，MP277黑屏無顯(xian)(xian)示(shi)維(wei)(wei)(wei)修(xiu)(xiu)，MP377按鍵(jian)失(shi)(shi)靈(ling)(ling)(ling)維(wei)(wei)(wei)修(xiu)(xiu)，MP277進(jin)(jin)不(bu)(bu)了(le)(le)系統(tong)(tong)兩套系(xi)統，每套系(xi)統s7 212與(yu)昆侖通(tong)(tong)態(tai)觸摸(mo)屏(ping)通(tong)(tong)訊，然后兩個plc之(zhi)間進行網絡(luo)讀寫，每個PLC通(tong)(tong)訊口用RS485總線連(lian)接(jie)器(qi)鏈接(jie)，進口接(jie)觸摸(mo)屏(ping)，出口PLC之(zhi)間通(tong)(tong)訊，現(xian)在出現(xian)問題：四(si)臺(tai)設備，2臺(tai)觸摸(mo)屏(ping)、2臺(tai)PLC同(tong)時不能通(tong)(tong)訊，斷開一路觸摸(mo)屏(ping)連(lian)接(jie)就能通(tong)(tong)訊，請高手(shou)指(zhi)點。

西門子觸摸屏MP277通訊網口壞修復解決

答：觸摸屏連接PLC時，觸摸屏是主,PLC是從，主讀寫從。
PLC之間做通訊時，主讀寫從。
同一個485口不能同時既做主又做從。
212只有一個485口，所以通訊會出現問題。
你(ni)可以換(huan)成(cheng)226，用(yong)一(yi)個(ge)485口接屏(ping)，另一(yi)個(ge)485口做PLC間的通訊。或者用(yong)212加一(yi)個(ge)EM277 PROFIBUS從(cong)站模(mo)塊從(cong)而擴展(zhan)出來一(yi)個(ge)485口。