CN208506578U - A kind of digital control system based on bus type communication - Google Patents
A kind of digital control system based on bus type communication Download PDFInfo
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- CN208506578U CN208506578U CN201821412687.XU CN201821412687U CN208506578U CN 208506578 U CN208506578 U CN 208506578U CN 201821412687 U CN201821412687 U CN 201821412687U CN 208506578 U CN208506578 U CN 208506578U
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Abstract
The utility model discloses a kind of digital control systems based on bus type communication, comprising: master cpu unit, bus communication chip unit and bus physical layer communication unit, wherein, master cpu unit is connect by data/address bus with bus communication chip unit, data/address bus uses parallel form, bus protocol is Mechatrolink-II, bus communication chip unit uses dedicated communication chip JL-098B, bus physical layer communication unit includes: 485 communication chip U3, filter inductance L1, transformer T1 and plug CN1, 485 communication chip U3 are by the data conversion of Transistor-Transistor Logic level at differential signal, differential signal is followed by through filter inductance L1 filtering to transformer T1, transformer T1 modulates signals into the electric signal of required voltage, modulated electric signal It is sent through plug CN1.The problems such as the utility model has the beneficial effect that using bus communication, directly transmits data to servo unit, pulse frequency limitation, pulse missing, poor interference free performance is not present.
Description
Technical field
The utility model relates to a kind of digital control systems, and in particular to a kind of digital control system based on bus type communication belongs to
Electroporation field.
Background technique
Traditional digital control system is all to control the corner and speed of servo motor by sending pulse signal, works as servo
When the rate request of motor is relatively high, need to send the frequency of pulse signal with regard to relatively high, and the member of general return pulse signal
Part has highest to receive frequency limit, so being difficult to improve the speed of servo motor, and arteries and veins during return pulse signal
Signal to be rushed to be easy to lose step, anti-interference is poor, in addition, there are certain delays since pulse signal sends and receives all, so
Net synchronization capability is also poor.
Utility model content
To solve the deficiencies in the prior art, the purpose of this utility model is to provide a kind of numerical controls based on bus type communication
System.
In order to achieve the above objectives, the utility model adopts the following technical solutions:
A kind of digital control system based on bus type communication characterized by comprising master cpu unit, bus communication chip
Unit and bus physical layer communication unit, in which:
Aforementioned master cpu unit is connect by data/address bus with bus communication chip unit, and data/address bus uses parallel
Form, bus protocol Mechatrolink-II；
Aforementioned bus communication chip unit uses dedicated communication chip JL-098B, and communication chip JL-098B is by master control
The data of CPU element write-in are packaged into data frame structure, and serial mode is sent to bus physical layer communication by TXD pin
Unit, while the data of bus physical layer communication unit are received by RXD pin and are saved in a register；
Aforementioned bus physical layer communication unit includes: 485 communication chip U3, filter inductance L1, transformer T1 and plug
CN1, wherein 485 communication chip U3 are connect by TXD pin, RXD pin and TXEN pin with communication chip JL-098B, and 485
By the data conversion of Transistor-Transistor Logic level at differential signal, differential signal is followed by through filter inductance L1 filtering to transformer communication chip U3
T1, transformer T1 modulate signals into the electric signal of required voltage, and modulated electric signal is sent through plug CN1.
Digital control system above-mentioned based on bus type communication, which is characterized in that CPU used by aforementioned master cpu unit
Model S3C2416X.
Digital control system above-mentioned based on bus type communication, which is characterized in that aforementioned bus physical layer communication unit is adopted
The model SN65HVD05D of 485 communication chip U3.
Digital control system above-mentioned based on bus type communication, which is characterized in that aforementioned bus physical layer communication unit also wraps
Contain: resistance R1, resistance R1 are connected in parallel between the A2 foot of plug CN1 and A3 foot.
Digital control system above-mentioned based on bus type communication, which is characterized in that aforementioned bus physical layer communication unit also wraps
Contain: one end of capacitor C2, capacitor C2 are connect with 2 feet of transformer T1 and 7 feet, and the A4 foot and B4 foot of the other end and plug CN1 connect
It connects.
Digital control system above-mentioned based on bus type communication, which is characterized in that aforementioned bus physical layer communication unit also wraps
Contain: one end of capacitor C3, capacitor C3 and the cage connection of plug CN1, the other end are connect with GND.
The utility model has the beneficial effect that
(1) bus communication is used, data is directly transmitted to servo unit, there is no pulse frequency limitation, pulse missing, resists
The problems such as jamming performance is poor；
(2) bus has the characteristics that agreement is simple, fault-tolerant ability is strong, safety is good, can not only make system and servo unit
Between high-speed transfer mass data, meet the processing request of high-precision high-speed, and system can be simplified, convenient for extension；
(3) by bus communication, digital control system can read the working condition of each servo unit, and show in real time
Screen display comes out, and allows user that the working order of equipment can be understood more intuitively.
Detailed description of the invention
Fig. 1 is the circuit diagram of the digital control system based on bus type communication of the utility model.
Specific embodiment
Specific introduce is made to the utility model below in conjunction with the drawings and specific embodiments.
Referring to Fig.1, the digital control system of the utility model is based on made of bus type communication Design comprising: master cpu
Unit, bus communication chip unit and bus physical layer communication unit.
Above three unit is discussed in detail in we respectively below.
One, master cpu unit
Master cpu unit is connect by data/address bus with bus communication chip unit, and data/address bus uses parallel form,
Master cpu unit can carry out the read-write of high speed, bus protocol Mechatrolink-II to bus communication chip unit.
As a preferred solution, the model S3C2416X of CPU used by master cpu unit.
Two, bus communication chip unit
Since the bus protocol used between master cpu unit and bus communication chip unit is Mechatrolink-II,
So bus communication chip unit uses dedicated communication chip JL-098B.
The address signal ADDR0 to ADDR16 of cpu data bus is connected to the CA0 to CA16 of communication chip JL-098B,
The data-signal RDAT0 to RDAT15 of CPU is connected to the CD0 to CD15 of communication chip JL-098B, and the enabled nRWE that writes of CPU connects
To the nRWE of communication chip JL-098B, the enabled nROE of the reading of CPU is connected to the nROE of communication chip JL-098B, and the piece of CPU selects letter
Number nRCS3 is connected to the nRCS of communication chip JL-098B, and the waiting signal nWAIT of CPU is connected to communication chip JL-098B's
The EINT8 of nWAIT, CPU are connected to the INT1 of communication chip JL-098B.
The data such as the location information that master cpu unit is written are packaged into data frame structure by communication chip JL-098B, are passed through
(485 specifically in bus physical layer communication unit are logical the bus physical layer communication unit that is sent to of serial mode for TXD pin
Interrogate chip U3), while bus physical layer communication unit is received (specifically in bus physical layer communication unit by RXD pin
485 communication chip U3) data and save in a register, for master cpu unit read.
Three, bus physical layer communication unit
Bus physical layer communication unit includes: 485 communication chip U3, filter inductance L1, transformer T1 and plug CN1.
485 communication chip U3 are connect by TXD pin, RXD pin and TXEN pin with communication chip JL-098B, specifically
, the transmission enable signal TXEN of communication chip JL-098B is connected to the DE pin of 485 communication chip U3, communication chip JL-098B
Data send signal and be connected to the D pin of 485 communication chip U3, it is logical that the data reception signal of communication chip JL-098B is connected to 485
The R pin of chip U3 is interrogated, the RE of 485 communication chip U3, which is received, to be enabled to be connected to GND.The 485 preferred models of communication chip U3
SN65HVD05D。
Filter inductance L1 is connect with the output end of 485 communication chip U3, specifically, the a-signal of 485 communication chip U3 is connected to
4 feet of filter inductance L1 are filtered, the B signal of 485 communication chip U3 is connected to 1 foot of filtering filter inductance L1.
Transformer T1 is connect with the output end of filter inductance L1, specifically, 3 feet of filter inductance L1 are connected to transformer T1's
2 feet of 5 feet, filter inductance L1 are connected to 6 feet of transformer T1.
Plug CN1 is connect with the output end of transformer T1, specifically, 1 foot of transformer T1 be connected to plug CN1 A3 foot and
B3 foot, 8 feet of transformer T1 are connected to the A2 foot and B2 foot of plug CN1.
The course of work of bus physical layer communication unit: 485 communication chip U3 believe the data conversion of Transistor-Transistor Logic level at difference
Number, differential signal is followed by modulating signals into the telecommunications of required voltage to transformer T1, transformer T1 through filter inductance L1 filtering
Number, modulated electric signal is sent through plug CN1.
As a preferred solution, bus physical layer communication unit also includes: resistance R1, and resistance R1 is connected in parallel on plug
Between the A2 foot and A3 foot of CN1.The effect of resistance R1 in this circuit arrangement is: preventing signal reflex from interfering original signal.
As a preferred solution, bus physical layer communication unit also includes: capacitor C2, one end of capacitor C2 and transformation
2 feet of device T1 and the connection of 7 feet, the other end are connect with the A4 foot of plug CN1 and B4 foot.The effect of capacitor C2 in this circuit arrangement is:
High-frequency interferencing signal is filtered.
As a preferred solution, bus physical layer communication unit also includes: capacitor C3, one end of capacitor C3 and plug
The cage connection of CN1, the other end are connect with GND.The effect of capacitor C3 in this circuit arrangement is: inhibiting high-frequency interferencing signal.
Since digital control system provided by the utility model uses bus communication, data are directly transmitted to servo unit, so
The problems such as there is no pulse frequency limitations, pulse missing, poor interference free performance.
In addition, the digital control system of pulsed, must connect a communication signal line between each servo unit,
When using multiaxis, the various complexity of wiring.And the digital control system of bus type provided by the utility model, only need a communication letter
Number line is connected to first servo unit, and first servo unit is connected second servo unit again, and so on, not only simplify
Wiring, and can more easily extend the number of axle.
It should be noted that above-described embodiment does not limit the utility model in any form, it is all to use equivalent replacement or wait
The mode technical solution obtained for imitating transformation, all falls in the protection scope of the utility model.
Claims (6)
1. a kind of digital control system based on bus type communication characterized by comprising master cpu unit, bus communication chip list
Member and bus physical layer communication unit, in which:
The master cpu unit is connect by data/address bus with bus communication chip unit, and data/address bus uses parallel form,
Bus protocol is Mechatrolink-II；
The bus communication chip unit uses dedicated communication chip JL-098B, and communication chip JL-098B is by master cpu list
The data of member write-in are packaged into data frame structure, and serial mode is sent to bus physical layer communication unit by TXD pin,
The data of bus physical layer communication unit are received by RXD pin simultaneously and are saved in a register；
The bus physical layer communication unit includes: 485 communication chip U3, filter inductance L1, transformer T1 and plug CN1,
In, 485 communication chip U3 are connect by TXD pin, RXD pin and TXEN pin with communication chip JL-098B, 485 communication cores
By the data conversion of Transistor-Transistor Logic level at differential signal, differential signal is followed by through filter inductance L1 filtering to transformer T1, transformation piece U3
Device T1 modulates signals into the electric signal of required voltage, and modulated electric signal is sent through plug CN1.
2. the digital control system according to claim 1 based on bus type communication, which is characterized in that the master cpu unit
The model S3C2416X of used CPU.
3. the digital control system according to claim 1 based on bus type communication, which is characterized in that the bus physical layer is logical
Interrogate the model SN65HVD05D of 485 communication chip U3 used by unit.
4. the digital control system according to claim 1 based on bus type communication, which is characterized in that the bus physical layer is logical
News unit also includes: resistance R1, resistance R1 are connected in parallel between the A2 foot of plug CN1 and A3 foot.
5. the digital control system according to claim 1 based on bus type communication, which is characterized in that the bus physical layer is logical
News unit also includes: one end of capacitor C2, capacitor C2 are connect with 2 feet of transformer T1 and 7 feet, the A4 of the other end and plug CN1
Foot is connected with B4 foot.
6. the digital control system according to claim 1 based on bus type communication, which is characterized in that the bus physical layer is logical
News unit also includes: one end of capacitor C3, capacitor C3 and the cage connection of plug CN1, the other end are connect with GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821412687.XU CN208506578U (en) | 2018-08-30 | 2018-08-30 | A kind of digital control system based on bus type communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821412687.XU CN208506578U (en) | 2018-08-30 | 2018-08-30 | A kind of digital control system based on bus type communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208506578U true CN208506578U (en) | 2019-02-15 |
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| CN201821412687.XU Active CN208506578U (en) | 2018-08-30 | 2018-08-30 | A kind of digital control system based on bus type communication |
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2018
- 2018-08-30 CN CN201821412687.XU patent/CN208506578U/en active Active
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