S7300PLC讲义--模拟量

Date:2020/5/21File:SSP1_01C.1SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation模拟量处理S7-300:模拟量Date:2020/5/21File:SSP1_01C.2SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation生产过程中有大量的连续变化的模拟量需要用PLC来测量和控制：非电量：例如温度、压力、流量、频率等。强电电量：例如发电机的电流、电压、有功功率、无功功率和功率因数等。Date:2020/5/21File:SSP1_01C.3SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomationDate:2020/5/21File:SSP1_01C.4SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomationS7-300:硬件接线Date:2020/5/21File:SSP1_01C.5SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomationS7-300:测量范围的选择新建一个工程，进入硬件组态，可以对模块的每一输入输出通道组选择测量的信号种类（电压信号或电流信号）和允许的任意量程。Date:2020/5/21File:SSP1_01C.6SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomationS7-300:编程符号和变量编辑编辑模拟量输入和输出端口的符号、地址：Date:2020/5/21File:SSP1_01C.7SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation编程插入一个数据块FB1，Date:2020/5/21File:SSP1_01C.8SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomationPIW75211DB2.DBD21Date:2020/5/21File:SSP1_01C.9SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation276MD108MW112PQW75227648Date:2020/5/21File:SSP1_01C.10SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation双击OB1，在左边的FBBlocks中选择FB1并按住鼠标，将其拖到梯形图中，则FB1就出现在梯形图程序中了，在FB1的模块的上方需填写对应的数据块的名称，如下图保存后，该程序即编写完毕。Date:2020/5/21File:SSP1_01C.11SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation输入数据块名称后会弹出提示框，只需点击“yes”即可，这时，对应的数据块便会出现在Blocks里面，还可建立其他模块。Date:2020/5/21File:SSP1_01C.12SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation在SIMATICManager窗口中，选择PLCDownLoad，下载程序完毕即可运行调试。Date:2020/5/21File:SSP1_01C.13SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation点击设备--新建，弹出设备配置向导，选择正确的设备生产厂家、设备名称和通讯方式，然后点击下一步，输入唯一的设备逻辑名称。S7-300:与组态王通讯Date:2020/5/21File:SSP1_01C.14SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation继续点击下一步，进入地址设置指南，设置设备地址。组态王地址格式：*.*，其中小数点前为MPI地址(即站号)，小数点后为MPI设备（即所使用的通讯模块或CPU模块）的槽号（slotnumber）范围为.0~126.126，建议使用常用的地址范围为2.2~126.30.一般PLC默认的地址(即站号)为2，槽号为2，组态王设备地址定义为2.2.Date:2020/5/21File:SSP1_01C.15SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomationDate:2020/5/21File:SSP1_01C.16SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation对于E（I）、A（Q）寄存器，组态王不支持位数据类型，只能以字节（BYTE）或字符串形式存取数据。每一个BYTE类型（8个BIT位）可以对应8个开关量的输入或输出状态，即BYTE的0-7位分别对应输入或输出的0-7开关量通道。如果想显示或控制某一开关量通道的状态，必须使用组态王提供的BIT()或BITSET()函数进行取位或置位。S7-300:组态王变量设置Date:2020/5/21File:SSP1_01C.17SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation如上图，定义一个I/O实数变量：AI0。Date:2020/5/21File:SSP1_01C.18SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation在“工具箱”中点击“打开图库”，选择如图所示的仪表。再点击“实时曲线”，拖出一个实时曲线图。如下图所示。Date:2020/5/21File:SSP1_01C.19SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation双击仪表，弹出“仪表向导”对话框，连接到变量AI0，其他设置如图所示。Date:2020/5/21File:SSP1_01C.20SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation双击实时曲线，弹出“实时趋势线”对话框，连接到变量AI0，其他设置如图所示。Date:2020/5/21File:SSP1_01C.21SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation至此，一个通过PLC对模拟量进行处理，然后再运用组态软件与PLC进行通讯的工程已经完毕，可运行观察其效果。Date:2020/5/21File:SSP1_01C.22SIMATICS7SiemensAG2000.Allrightsreserved.InformationandTrainingCenterKnowledgeforAutomation谢谢~~