The application of mitsubishi CC - Link bus instance

In the development of turbine speed, we adopt mitsubishi CC CC - Link application mitsubishi - CC - Link application mitsubishi Link bus as spare as a double PLC channel, now the introduction is as follows:

1.The governor of hardware parts:

Governor of hardware configuration is mainly composed of two sets of PLC configuration identical: main base board, power supply module, CPU module, input module, I/O output I/O module, A/D module, D/A module, high speed counting module, communication module cc-link. Monitor screen using flat-panel LCD computer (with a touch screen), and CC - Link bus communication using installed PCI interface card cc-link A80BDE - J61BT13 constitute.

1.     The realization of the data communication between the double PLC:

Can define any PLC system as the main station or standby station, communication between PLC rate of 0 MBPS, only on the CC - Link module setting station number, 0 is given priority to stand. Communication method is as follows: the main corresponding X, and Y for the local station, such as: local exports mainly Y1000 points stand X2000 input. The corresponding register D are the same.

2.     The PLC software Settings using mitsubishi cc-link GX software Developer Settings:

CC - Link module number: this set of PLC substrate CC - the number of the Link module, only a governor.

Start I/O number: said CC - Link module is installed in the position of the substrate, the regulator module installed on in addition to the power supply module and CPU module of the eighth slot

Type: defines the set of system of CC - Link module as the main station or a local station. (relate to the station number of switch Settings on the module).

The total number of links: only need to set up in the main, because B set of PLC (local) and PCI card cc-link, reason for 2 sets of local station.

Remote input (Rx) to refresh the soft components: set to m2000. Remote input (Ry) to refresh the soft components: set to m4000.

Remote input (RWr) to refresh the soft components: set to D1000. Remote input (RWw) to refresh the soft components: set to D2000.

Send her number: when there is a communication failure, the number of retry link again. Station information specified: when click station information, in the following picture

3.     CC - the Link between PLC data communications:

Above communication fault judging events for only 200 ms, communication failure, data will not be reset, maintain communication before failure data. Local station due to occupy four station, the amount of reading and writing data stations for 4 words and 32 I/O quantity, the amount of data communication is 128 (32 bit (4) and 16 bits variables (4 word x 4) word variable, because of the speed regulation system of real-time data exchange is not very big, the exchange of data mainly are: the guide vane opening, the unit residual voltage frequency, tooth plate measuring frequency, power unit, real-time head, all kinds of given value (given the frequency is given and the opening, power given), opening limit and so on. For the need of more data exchange capacity, can use flags. Such as a variable bit1 = 0 when sending packets DATA1_0 [16] a variable bit1 = 1 when sending packets DATA1_1. [16]. A variable bitn = 0 when sending packets DATAn_0 [16] a variable bitn = 1 when sending packets DATAn_1 [16] because a variable amount of communication for n = 128, the entire communications DATA (sending and receiving) Σ DATA = 2 x 2 x 128 x 16 = 8192 WORD. Amount of data for the communication, are able to meet the governor system requirements.

5. CC - Link with industrial computer data communication, industrial control the research degrees of PPC - 123 type flat-panel LCD computer, install the PCI interface card cc-link A80BDE J61BT13 and CC - Link bus communications. The interface card in the preset support various OS driver Windows 4.0, Windows NT Ver 4.0, etc.). In the attached CC - Link related parameters can be set on the Utility software. The interface card used as a local station, station number and communication parameters and PLC software cc-link from station set up the same. Through the CC - link interface card with dynamic interface function, can use VC and VB application development, implementation and other stand on cc-link data communications.

6, because use the CC - Link way has the communication rate of 10 megabits per second, double machine data exchange for synchronous, basically provide real-time data for the regulation of the turbine. And the way to the bus of open mode, has a very high reliability. Is the most precious in this way has a very high cost performance, the right price, the appropriate amount of communication data, high communication speed, reliability and so on.