In the application of capacitance mechanical ECBUS network

ECBUS network application in the capacitance mechanical Emerson IAC welcome to e exhibition hall 5 / industrial Ethernet fieldbus hall main boards, field bus adapter,. 。 。 One, the introduction of a certain production capacity machinery professional manufacturers, each line has three devices, can run independently. In 1 original PLC for centralized control, wiring not only inconvenient, and PLC failure, 3 devices can't run. In order to spread risk, ease of maintenance and wiring. By using Emerson ECBUS network distributed control system, each device configuration 1 PLC, PLC, the data can be Shared between in order to realize the interlocking and centralized to the text shown in the display. System configuration is as follows: RS485 / ECBUS network here with emphasis on the concept, setting up and application of the ECBUS network, other communications with text and servo drives a narrative. 2, 1, ECBUS ECBUS network communication protocol ECBUS is Emerson company developed a small PLC network. ECBUS at the physical layer using RS485, PLC can communication port 1 direct access or through the communication port 0 through RS232 / RS485 converter access. Can access ECBUS PLC controller automatic exchange part D element and M element values, which makes the access network in other PLC component, becomes as easy and convenient access to their own components. Data access between ECBUS, PLC is completely equivalent ( N: N) 。 Single-layer network: up to 32 PLC. Multilayer networks: maximum 16 sets of PLC on each floor. 2, Shared components address ECBUS exchange D components and M components called Shared components area. A total of 512 M component, from M1400 - M1911, 64 D component, from D7700 - 7763. Once used ECBUS PLC, these components address occupied, sharing the value will automatically refresh, PLC network in each element value to maintain equal sharing of area. For each PLC Shared area element can be read, but only to rewrite their own to write component values. As Shared components number is fixed, the more connected to the PLC, each PLC distribution can write the number of components is less, and successive element address is evenly distributed. To define the corresponding relationship with the refresh mode, according to the number of PLC on the network is divided into five kinds of patterns. 3, ECBUS set ECBUS network, a total of 3 sets of PLC controller in the application of single-layer network, so choosing mode 4. Each PLC assigned address is as follows: 0 # : M1400 - M1527 D7700 - D77151#：M1528- M1655 D7716 - D77312 #: M1656 - M1783，D7732- D7747ECBUS network setup is very simple, through the system block parameter Settings. Station set up starting from 0, 0 station is the start of the network and setting up the site, the network delay time is the largest number of polling station, accessories, retries, only to set 0 station mode setting. No. 1 #, 2 # station site in addition to the baud rate and parity and 0 station is consistent, only need to set up your own stand. 4, simple program to illustrate, assume that each PLC Shared data is as follows: 0 # # station: M0, M1; D0, D11 # # station: M2, M3, D2, D32 # # station: M4, M5; ； D4, D5 for each PLC, without communication programming, just need to send it to the other PLC component values into their Shared components, data automatically refresh, as long as the other PLC reads the corresponding component values Shared area. Station program: 0 # 1 # station program: 2 # station program: two, summarizing, using EC10 serial port 1, ECBUS network under the condition of without increasing any hardware, to achieve simple links between PLC. 2, ECBUS physical layer by RS485, simple and convenient, as long as 2 wires can, had better use shielded twisted-pair cable. 3, simple ECBUS window Settings, users only need to do a simple assignment, MOV instruction, without complex communications procedures. 4, biggest ECBUS communication speed to 115. 2 KBPS, which can meet most of the applications. 5, ECBUS is particularly suited to distributed control system, such as building automation, product in production line.
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