CN201156194Y - General PLC analog outputting module - Google Patents
General PLC analog outputting module Download PDFInfo
- Publication number
- CN201156194Y CN201156194Y CNU200820018049XU CN200820018049U CN201156194Y CN 201156194 Y CN201156194 Y CN 201156194Y CN U200820018049X U CNU200820018049X U CN U200820018049XU CN 200820018049 U CN200820018049 U CN 200820018049U CN 201156194 Y CN201156194 Y CN 201156194Y
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- CN
- China
- Prior art keywords
- analog quantity
- quantity output
- output module
- cpu
- isolation card
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Abstract
The utility model relates to a universal PLC analog quantity output module, which is particularly applicable to the fields of process industry control and numerical control machine control in order to realize process control. The universal PLC analog quantity output module consists of a CAN communication interface, a CPU, a relay isolation card and an analog quantity output contact, and wherein, the CPU is connected with a PLC master controller through the CAN communication interface and connected with the analog quantity output contact through the relay isolation card. The universal PLC analog quantity output module of the utility model has the advantages of low cost, high speed and flexible use and has prominent advantages particularly when relating to redundant backup.
Description
(1) technical field
The utility model relates to a kind of general PLC analog output module, especially is applied to the general PLC analog output module in process industry control and numerical controlled machinery Machine-Tool Control field, implementation procedure control.
(2) background technology
Quickening along with process of industrialization, also be developed rapidly as Industry Control digitizing, fieldbus (Fie1dBus) technology intelligent and networking typical case representative, influence huge, the general interest and the attention of engineering circle have been caused, make computer control system progressively move towards distributed field bus control system based on fieldbus and the corresponding function module from Distributed Control System (DCS), I/O (I/O) control station of realizing PLC master controller and dispersion is interconnected, constitutes Control Network.
PLC master controller and its I/O module interconnects on same data chainning adopt the bus functionality module based on the Profibus bussing technique usually at present, and master controller and remote station adopt the functional interface module based on this bussing technique, and be interconnected by respective bus.This field bus technique is most widely used at present, and technology is also the most ripe, and communication speed is also very fast, but the field bus control system cost that adopts this bussing technique is than higher, and the user can not self-defining communication protocol in application, and dirigibility is poor.The Profibus bussing technique adopts distributed token mode, all contacts are formed a virtual ring, token transmits by the address between the Profibus bus master, and the main website that has token has bus control right at the time window of determining, with polling mode and slave station communication.Need take certain bandwidth when this mode transmits token, so bandwidth utilization is lower.
The communication of swap data is divided into logic channel by channel and physical channel carries out between the Profibus bus apparatus.Undertaken by logic channel with communicating by letter between the application process, it is to be defined in correspondence table (CRL) in the design phase, and its all parameters are listed in the correspondence table.Each channel has an inlet row in CRL, all CRL inlets of a channel are by the unique addressing of correspondence (CR).This addressing mode in use user is poor according to the degree of freedom that own needs are provided with, when relating in particular to redundancy backup.
(3) summary of the invention
At the above-mentioned shortcoming of prior art, the utility model provides a kind of general PLC analog output module.
The utility model is by the following technical solutions:
The general PLC analog output module of the utility model comprises CAN communication interface, CPU, relay isolation card and analog quantity output contact; Wherein CPU links to each other with the PLC master controller by the CAN communication interface, and CPU is connected to the analog quantity output contact by the relay isolation card.
Above-mentioned general PLC analog output module, described relay isolation card are light lotus root isolation card.
The general PLC analog output module of the utility model adopts the communication interface of CAN communication interface as this output module and PLC master controller.The CAN bus has only been stipulated Physical layer and data link layer, and the user oneself defines communication protocol in application, outstanding dirigibility is arranged, and cost advantage and speed advantage are arranged.Be applied on the Industry Control fieldbus, can effectively embody its dirigibility.The CAN bus belongs to the bus-type serial communication network, adopt many master modes, when a plurality of contacts sent information simultaneously on the network, the contact that priority is low can initiatively withdraw from transmission, the impregnable continuation of the contact that priority is high transmits, and has saved the arbitration time of bus greatly.In addition, the CAN contact has the function of automatic pass closed bus under wrong serious situation.This agreement has outstanding reliability, dirigibility, and the CAN bus can effectively be avoided the bus collision.In the CAN system, each contact all has a unique address, and during bus work, the implication of the data of transmitting on the given logical address is fixed.This addressing mode has outstanding advantage when relating to redundancy backup.
(4) description of drawings
Fig. 1 is the general PLC analog output module of a utility model block scheme.
(5) embodiment
Embodiment 1:
With reference to Figure of description 1, this general PLC analog output module comprises CAN communication interface, CPU, relay isolation card and analog quantity output contact, and CPU links to each other with the PLC master controller by the CAN communication interface, is used to receive the master controller signal.The analog quantity output contact joins by relay isolation card and CPU, is used to export the analog data signal external system is carried out process control.This relay isolation card adopts light lotus root isolation card, with light is the light lotus root isolation card that coal Jie transmits signal, and input circuit is isolated, and can suppress system noise effectively, eliminate the interference of ground loop, have that response speed is very fast, the life-span is long, a little benefit such as shock-resistant of volume.
Claims (2)
1. general PLC analog output module, it is characterized in that: comprise CAN communication interface, CPU, relay isolation card and analog quantity output contact, wherein CPU links to each other with the PLC master controller by the CAN communication interface, and the analog quantity output contact joins by relay isolation card and CPU.
2. general PLC analog output module according to claim 1 is characterized in that: described relay isolation card is a light lotus root isolation card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820018049XU CN201156194Y (en) | 2008-02-27 | 2008-02-27 | General PLC analog outputting module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820018049XU CN201156194Y (en) | 2008-02-27 | 2008-02-27 | General PLC analog outputting module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201156194Y true CN201156194Y (en) | 2008-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820018049XU Expired - Fee Related CN201156194Y (en) | 2008-02-27 | 2008-02-27 | General PLC analog outputting module |
Country Status (1)
| Country | Link |
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| CN (1) | CN201156194Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336477A (en) * | 2013-07-15 | 2013-10-02 | 贵州大学 | Analog output module based on CAN bus |
-
2008
- 2008-02-27 CN CNU200820018049XU patent/CN201156194Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336477A (en) * | 2013-07-15 | 2013-10-02 | 贵州大学 | Analog output module based on CAN bus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081126 |