PCD231B 3HHE025541R0101 Before programming the software, you should first familiarise yourself with the software manuals of the PLC products you have chosen, and then program them after you have become proficient. If the graphical programmer or software package programming, it can be directly programmed, if programmed with a handheld programmer, you should first draw a ladder diagram, and then programming, so that less error, speed is also fast after the end of the programming first air-conditioning programme, to be normal after each action, and then debugging on the equipment.

PCD231B 3HHE025541R0101 depends on the system topology. A large number of multiprocessor nodes can be connected to a large (1,000-processor) system via a SAN (“big bus” model) to support distributed, integrated real-time systems for data acquisition, control, and data processing applications. and switching modules (L-modules, B-modules, and S-modules). The cost of communication speed decreases faster than the cost of pins and board space. Traditional communication is based on buses, which limits the number of processors.

PCD231B 3HHE025541R0101 Weak interactions between processor modules are based on messaging (Ethernet). Intermediate interactions are based on external storage devices used in the cluster (disks, tapes). Strong interactions between processor cores are based on direct reads to distributed memory and are implemented on SCI, which also supports weak interactions between processor modules.Strong interactions for SCI include small packet transactions (packets sent and responded to separated with echo).PCD231B 3HHE025541R0101Packet formatting includes the write xx, read xx, move xx, and lock commands. Here xx indicates the allowed data block length (number of data bytes, to the right of the packet header).