MMS6823/9100-00001-05前置器,EPRO使用指導
并行端口接口PCCchip2提供8位雙向并行端口。這端口可用作與Centronics兼容的并行打印機端口或作為通用并行輸入/輸出端口。
端口的所有八位必須是輸入或輸出（否單個(gè)位選擇）。除了8位數據外，還有兩個(gè)控制引腳和五個(gè)狀態(tài)引腳。當用作并行打印機端口時(shí)，這些引腳的功能如下：每個(gè)狀態(tài)引腳都可以在任何以下可編程條件之一：
? 高水平
? 低電平
? 高-低轉換
? 低到高轉換PCCCIP2提供了與MVME147 PCC。
? 在自動(dòng)選通模式下，寫(xiě)入打印機數據寄存器后，PCCCip2自動(dòng)為打印機快速選通控制位指定的選定時(shí)間。
MMS6823/9100-00001-05前置器? 在手動(dòng)模式下，打印機直接選擇控制位控制選通*引腳的狀態(tài)。以太網(wǎng)接口
82596CA實(shí)現以太網(wǎng)收發(fā)器接口。這個(gè)82596CA使用DMA操作訪(fǎng)問(wèn)本地RAM以執行其正常功能。以太網(wǎng)收發(fā)器接口位于MVME187上，并且行業(yè)標準連接器位于MVME712X上過(guò)渡模塊。
每個(gè)MVME187分配一個(gè)以太網(wǎng)站地址。這個(gè)地址是$08003E2xxxxx，其中xxxxx是唯一的5位字節分配給電路板的編號（即每個(gè)MVME187具有不同的xxxxx的值）。
每個(gè)模塊的標簽上都顯示了以太網(wǎng)站地址連接到VMEbus P2連接器。此外，六個(gè)字節包括以太網(wǎng)地址存儲在配置區域中BBRAM的。也就是說(shuō)，08003E2xxxxx存儲在BBRAM中。
? 在地址為$FFFC1F2C時(shí)，前四個(gè)字節（08003E2x）可以讀取。
? 在地址為$FFFC1F30時(shí)，較低的兩個(gè)字節（xxxx）可以被閱讀。
MVME187調試器能夠檢索或設置以太網(wǎng)地址。
如果BBRAM中的數據丟失，用戶(hù)應使用恢復VMEbus P2連接器標簽。Summary
This project is relatively simple on the whole. Only pay attention to the pulse output command with acceleration and deceleration, so as not to cause large loss to the motor and small vibration of the motor. The driver current only needs to be adjusted to drive the load to reduce the heating of the motor. At the end of 2012, we successfully developed the electric control system of concrete mixing plant of 1012 housing projects in Algeria by using delta DOP man-machine interface and delta DVP He3 series PLC. After ten months of commissioning and operation, it is in good condition. The production of concrete is about 16000 cubic meters, which meets the requirements of on-site construction. Through continuous improvement, the electric control system V3 version of small concrete mixing plant is summarized. This version refines the system, improves efficiency, has good continuity and runs more smoothly. It lays a foundation for the establishment of small mixing plants on the construction site in the future.
System structure:
V3 version: realize man-machine communication through HMI touch screen. The weighing sensor and analog input module collect the analog quantities of aggregate, cement, chemicals and water respectively, and 4-way electronic scales. PLC completes data operation and signal processing, drives AC contactor and drives electromechanical operation. Process control is realized.In order to expand the data storage space, the formula and historical data are set to be saved in USB flash disk, which can be easily read and written through PC for reference and management.
HMI man-machine
