ABB XVC768101 3BHB007211R101 自动化模块

ABB XVC768101 3BHB007211R101 自动化模块

ABB XVC768101 3BHB007211R101 自动化模块

ABB XVC768101 3BHB007211R101 自动化模块在用户程序执行阶段，PLC总是按由 上而下的顺序依次地扫描用户程序(梯形图)。在扫描每一条梯形图时， 又总是先扫描梯形图左边的由各触点构成的控制线路,并按先左后右、先上后下的顺序对由触点构成的控制线路进行逻辑运算,然后根据逻辑运算的结果，刷新该逻辑线圈在系统RAM存储区中对应位的状态;或者刷新该输出线圈在I/O映象区中对应位的状态;或者确定是否要执行该梯形图所规定的特殊功能指令。

ABB XVC768101 3BHB007211R101 自动化模块即，在用户程序执行过程中，只有输入点在I/O映象区内的状态和数据不会发生变化，而其他输出点和软设备在I/O映象区或系统RA存储区内的状态和数据都有可能发生变化，而且排在上面的梯形图，其程序执行结果会对排在下面的凡是用到这些线圈或数据的梯形图起作用;相反,排在下面的梯形图，其被刷新的逻辑线圈的状态或数据只能到下一个扫描周期才能对排在其上面的程序起作用。

ABB XVC768101 3BHB007211R101 自动化模块

ABB XVC768101 3BHB007211R101 Automation module In the execution phase of the user program, the PLC always scans the user program in order from top to bottom (ladder diagram). When scanning each ladder diagram, it always scans the control line composed of each contact on the left side of the ladder diagram first, and carries out logical operations on the control line composed of contacts in the order of first left and then right, first up and then down, and then refreshes the status of the corresponding bit of the logic coil in the system RAM storage area according to the results of logical operations; Or refresh the state of the corresponding bit of the output coil in the I/O map area; Or determine whether to execute the special function instructions specified in the ladder diagram.

ABB XVC768101 3BHB007211R101 Automation module, that is, during the execution of the user program, only the status and data of the input point in the I/O map area do not change, while the status and data of other output points and software devices in the I/O map area or system RA storage area may change. And the ladder diagram on the top, the program execution results will work on the ladder diagram on the bottom that uses these coils or data; In contrast, in the ladder diagram below, the status or data of the logic coils that are refreshed can only be useful to the program above it until the next scan cycle.

ABB XVC768101 3BHB007211R101 自动化模块

ABB PP885 3BSE069276R1

ABB 07KT92 CS31

ABB ABB  5SHY3545L0016  3BHB019719R0101 GVC736BE101 5SXE06-0160

ABB ABB  07KT97 GJR5253000R4270

ABB ABB  07KT98 GJR5253100R4278

ABB ABB  07KT98 H2 GJR5253100R0278

ABB ABB  07KT98C GJR5253100R028

ABB ABB  KUC711AE 3BHB004661R0001

ABB ABB  KUC711AE01 3BHB004661R0001

ABB ABB  KUC711AE101 3BHB004661R0101

ABB ABB  PFTL101A 1.0KN 3BSE004166R1

ABB ABB 5SHX1445H0002 3BHL000387P0101

ABB ABB REF601 CE446BB1NH

ABB CI546 3BSE012545R1

ABB KUC720AE01 3BHB003431R0001 3BHB000652R0001

ABB PFTL101B 5.0KN 3BSE004191R1

ABB PPC380AE01 HIEE300885R0001

ABB TP854 3BSE025349R1

ABB UBC717BE101 3BHE021887R0101

ABB UFC718AE01 HIEE300936R0001