BL20-1AI-U
BL20-1AI-U
BL20-1AI-U
《聯系人；歐先生》
首先分析系統構成。3個車間共46臺注塑機，天星組態軟件通過RS485總線與注塑機的控制器進行通信，采集控制器班產量、超標次數、開機時長、運轉時長、超標率等運行數據。系統特點呈分布式獨立控制，再由上位機統一采集管理數據。如果使用一個串口，設備多會引起速度緩慢，而且總線一旦出現故障，所有設備數據均不能采集。同時，使用一個串口，采用線性結構必然導致總線距離過長，通信穩定性下降。最后綜合考慮，給計算機添加一個串口卡，每個車間使用一個串口和天星連接。系統結構如圖1。
圖一
這里我向大家提供一些在工程開發中的小技巧：
一、提高采集速度。運行時溶膠溫度、壓力、注射量、保壓時間等設定參數根據需要可以下載到注塑機無需實時采集，使用世紀星的動態優化功能。在創建驅動設備時，選擇“動態優化”選項，天星運行時，只采集當前顯示畫面所使用的變量、需要歷史數據保存的變量、需要報警的變量及命令語言中使用的變量，不采集其它變量，當采集的變量數量多時，系統的采集速度明顯提高。
二、超標自鎖功能。當合格率低于某個值時，自動對該注塑機鎖定，解鎖之后才能繼續運行。注塑機提供產量和合格產品數量，在天星命令語言里，實時計算出合格率，當合格率低于設定值時，將注塑機鎖定變量置一。設定當系統時間到某個設定時間時，將鎖定變量置零。同時還設置有解鎖按鈕，設置安全區，當有權限的用戶登錄時，可以操作這個按鈕，將鎖定變量置零。
《座機：0592-5709825》
《傳真：0592-5917519》
《24小時熱線：18030229053微信同步》
《QQ ：2479261344》
《QQ郵箱：2479261344@qq.com》
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