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1-PLC126231B specifications
作者:管理员    发布于:2009-12-15 16:22:05    文字:【】【】【

    [PLC126231B] specifications

Ladies and gentlemen, dear friends and relatives:
    Moto Koji will tell you detail [PLC126231B] of the installation, use and technical key points, welcome to my shop.

    In this store display of goods, [PLC126231B] is a standard type PLC. Not only fully functional, able to adapt to almost all applications of PLC, and also a has distributed characteristics of PLC.

    [PLC126231B] is designed for high speed applications and supporting the design of the PLC:

    [1] printing plate size: 12.24x8.74cm / 4820x3440mil;
    [2] installation hole size: 11.50x8.00cm / 4530x3150mil;
    [3] basic structure: the base of domestic standard of 145x90mm industrial control cabinet, Industrial Rail mounting;
    [4] central processor: stc90c58ad, using an external active crystal, LQFP44 package;
    [5] working frequency: 88.4736 MHz, 12 clock cycle;
    [6] memory: 32k/Flash, 29k/EEPROM, 4096/SRAM;
    [7] serial port baud rate: 1200-2.7648M bp/s, full duplex;
    [8] The network configuration: RS-422 full duplex, J45 network socket;
    [9] power supply: quiescent current 12V/ machine is about 100-120mA;

    The basic characteristics of the [PLC126231B]:

    [1] high speed serial port, baud rate can reach 2.7648M bp/s;
    [2] high speed output port, the frequency characteristic of 1MHz;
    [3]10 A/D and the high speed input port, the switching frequency can reach 1MHz; [89 clock cycles.
    [4]16 bit precision D/A, resolution is better than 1/10000 [single end];
    [5]16 bit precision A/D, resolution is better than 1/10000 [difference];
    [6] can be directly connected to the z893;
    [7] embedded emdos operating system;
    [8] low price, small size, high reliability, software level compatible Desktop PC operating system, is a scientific research personnel rare development tool.

    [PLC126231B] the main parameters:

    [1]12 output (0-12V);
    [2]6 input (0-12V) + 1 differential synchronization;
    [3]2 Road 16 D/A (0-10V and 0-5V);
    [4]2 Road 10 A/D (0-5V);
    [5]1 Road 16 phase difference A/D (0-2048mV), 8 times amplification (0-256mV);
    [6]1 differential synchronization;
    [7]1 on RS-422 full duplex communication port (1200 2.7648M bp/s).

    [PLC126231B] the use of European terminals, equivalent to a 26 bit programmable, and printed board dimensions of only 12.24 x 8.74 cm. Design of polite, double sided with the process, give a person a very concise feeling. The performance of the whole machine is mainly composed of a chip decided, affected by the peripheral device is small, can reduce labor cost greatly, so the price is low, hope you will like it.

    1 power supply [12V/2A]

    The power supply of external 12V, current capacity of more than 2A at least. The static current is about 100-120mA, using natural air convection cooling.
    [1] 7805 direct welding on the printed circuit board power adjustment tube, in order to enhance the cooling effect, in the side drilled with 3mm diameter of perforation, to form a highly efficient air circulation channel. After testing, the environmental temperature of 25 DEG C case, 24 hours electricity preheating, power adjustment tube core temperature of <60 DEG C.
    [2] external power supply circuit, access a Schottky diode, and at the front and the back, to the place of the 0.22uF capacitor, high frequency filter.
    [3]12V and 5V loop, for access to two groups of 470uF-1000uF of the electrolytic capacitor, its location rely firmly on the printed board at both ends of the power supply circuit, effectively reducing the low-frequency filter circuit impedance.
    [4] two level power supply channel independent of A/D and D/A, which greatly reduces the power supply ripple crosstalk.

    Technical points:

    [PLC126231B] using 7805 linear regulator, without the use of switching regulator, is based on the PLC, equipped with 16 bit high accuracy of A/D and D/A, in order to achieve more than 1/10000 accuracy, while sacrificing little efficiency, also is the rogue move.
    [1] switch power supply and DC/DC converter, although has the advantage of high efficiency, but tend to produce high-frequency burrs or spikes, which makes the output ripple is very large, and these high-frequency burrs or peak, it is difficult to clean by capacitor filter.
    [2] linear regulator, efficiency is a point, but the output ripple is very small, with DC attributes, can by increasing the amount of smoothing filtering electrolytic capacitor, output high gain.
    [3] linear regulator and switching power supply, both in stability and precision voltage, there exists great difference. Tested by oscillograph, the use of voltage of 7805 +5V, the ripple stability < Delta 1mv/10s, the switching power supply is difficult to.
    From a practical point of view, the effect also is indeed very obvious, 16 bit A/D, plus 8 times the pre amplification, resolution can still reach [+/-]1 Bt, the precision is 7.8125 UV, with analytical grade level.

    2 high speed serial [2.7648M bp/s]

    Serial standard RS-422 configuration.
    Baud rate ranges: 1200-2.7648M bp/s.
    Signal level: difference full duplex.
    Using J45 network socket, 8 core network head connection.
    In order to improve the reliability, each signal line of serial port, use the two terminal head.
    The advantage of this is that, even if one plug bad contact, it will not affect the normal transmission of the whole system.
    Two line and a signal line, fault tolerance with hardware, but also can greatly reduce the line resistance, reduce the loss of reactive power, is conducive to the stable transmission.
    Network socket:
    [1]1-2 feet to the string out (A)
    [2]3-4 feet to the string out (B)
    [3]5-6 feet to the string in (A)
    [4]7-8 feet to the string in (B)
    [5] logic "1" for A>B;
    [6] logic "0" for A<b;< trans=""></b;<>
    Communication signal for full duplex, level with RS-422, using double sn75176 chip drive power.
    The theoretical maximum transmission rate of the chip is 10M bp/s, can ensure that the actual work in the 2.7648M bp/s, there is a certain amount of surplus.

    Technical points:

    PLC J45 network using sockets, 8 core network head connection.
    The 8 core network lines are divided into four groups, each group of 2 signals, i.e., the output A, B and A, B input. When the connection request signal lines arranged, as follows:
    [1] Party A Party B (output A) connection (A input);
    [2] Party A Party B (output B) connection (B input);
    [3] Party A Party B (A input) connection (A output);
    [4] Party A Party B (B input) connection (B output).
    [5] is big in the interference source place, it is best to use a cable with shielding.

    [PLC126231B] RS-422 full duplex serial port configuration, the terminal is J45 mesh seat, FSB crystal 44.2368, MHz, CPU operating speed is 88.4736 MHz, although it is not a top-level configuration, but also enough mainstream.
    The highest baud rate of 2.7648M is 24 times of bp/s, 115.2k bp/s, a minimum of 1200 bp/s, almost all compatible communication protocols, and all the frequency point can provide zero deviation precision.

    3 high speed output [>1MHz] switching frequency

    Output PLC mouth, usually using the optical isolation, using the output relay or transistor. Its advantages are high security, the disadvantage is the low switching frequency.
    Relay switching frequency <50 Hz,
    Transistor switching frequency <10kHz,
    The switching frequency of the <25kHz optical isolator,
    [PLC126231B] the output port, the frequency characteristics of >1MHz, which belongs to the high speed I/O. So the light isolation can not be used, they don't even say a relay or a transistor.
    It is used in special driving chip mic4423, the SOIC-8 package.
    The theoretical parameters of the chip is: working voltage of =12-18V, Ipk=3A, ESD=1000V, tpw=400ns, the equivalent switching frequency of 2.5MHz bi-directional push-pull type solid state relay.
    To adapt to the silicon controlled rectifier, power supply, variable frequency speed regulation, different frequency ultrasound laser fields.
    The practice proved that, in these applications, if the frequency characteristics of the output port is not high, in the process of switching up or down, it will cause serious heating power module, low efficiency, and high speed I/O port, almost none of these problems.

    1 technical points:

    High speed chip, usually have a high peak of the driving ability. The ability of driving high peak, mean high risk, especially the load short circuit, will cause the chip overheating, this is a contradiction between the two aspects.
    [PLC126231B] in the output circuit of the chip resistor, series a small resistance, under normal circumstances, its pressure drop is very small, the heating is also small, but when the peripheral serious over-current, SMD resistor assume full voltage, will the burning heat, thus cutting off the chip load, is like a fuse.
    Currently there is a component, called the self recovery fuse, 0805 and 1206 two specifications. But the listed soon, test feeling is not very reliable, so don't currently use, but does not rule out the possibility of using, which is the same in installation.
    The user needs to prior assessment of good risk adequately, make a.

    [PLC126231B] of the output, the equivalent of a (2.8-4.3) European resistance, release and suction flow function, therefore has the two-way sliding property, can directly drive the intermediate relay. After using the intermediate relay [PLC126231B], can replace the conventional PLC, its safety is not less than the use of light isolation plc.

    2 technical points:

    Driving intermediate relay, advisable to use two [XOR mode. The security mode has a very high, can effectively prevent the misoperation of power. In some medical laser applications, [the XOR pattern has become the default standard, disadvantage is the need for more I/O.
 
 

    4 optically isolated input port [12V/5mA]

    [PLC126231B] input port, polite. The use of optical isolation, its parameters and routine is basically the same, but slightly smaller size.
    TLP281GB, SOP4 package.
    The theoretical parameters of the chip are: Vs=12-80V, Ipk=50mA, ESD=2500V, tpw=40uS, the equivalent switching frequency of 25kHz photoelectric isolator.
    [1] in the input circuit, the series resistance of a 2K patch. The working voltage is 12V, the signal to ground short circuit to enter a valid, open for invalid input.
    The terminal to ground short circuit, the working current is about 5mA.
    Terminal head on to open, the working current is about 0mA.
    [2]PLC light across the load resistance is 5.1k, even with the input, if the strength of the current is less than 0.5mA, it will not form a TTL signal effectively, so it has high anti-interference ability.
    In the strong interference environment, but also can reduce the load resistance of light insulation, in order to achieve higher security, drawback is that would increase the power of the power.

    Technical points:

    [PLC126231B] input port, a Schottky diode configuration Kan, negative voltage to the light isolation are current limiting protection. Theoretically speaking, the input can also work in AC circuit.
 


 
    5 16 D/A [DA1/0-10V, DA2/0-5V]

    [PLC126231B] D/A is 16 bit precision, two configuration, signal level is 0-10V and 0-5V.
    Using dac8532 chip, Vssop-8 package.
    The theoretical parameters of the chip as: voltage =2.7-5.5V, current is =250uA, the channel number 2, interface mode is SPI, output setup time =10us, switching speed equivalent to 100kHz.

    Technical points:

    The chip output directly, without the use of a buffer, so high resolution based on the device, the general is very difficult to guarantee has the same matching precision, but rather to use its internal operational and more stable.
    Dac8532 internal operational amplifier, the working voltage is 5V, the output for the 5V, so the maximum and minimum value near there will be linear change phenomena to a certain extent, this is the saturation voltage drop formation. Therefore some of the requirements for the absolute zero or application of absolute +5V, it must be the other with peripheral circuit, can not be said to be a little regret.

    6 A 10 bit high-speed A/D [single end]

    [A/D PLC126231B] high speed as single end input, two channel, conversion chip for built-in CPU.
    The theoretical parameters of the chip: the fastest conversion speed is 89 clock cycles, the slowest for 534 clock cycles, the built-in CPU speed adjustment register, if the operating frequency of 88.4736 MHz, speed range is about Hz/ times between 160K-1M.
    The occupation of P1.0-P1.1 channel, the input range is 0-5V, the precision is 0-1024.
    With its speed, also, its accuracy, about 1/1000, not too high, nor too low.
    Mainly used for temperature detection, key scan etc.. But not to send it to high hope value, stability, accuracy, linearity, can put on a par with professional ad chip, can only be regarded as a kind of function.
    [1] single ended A/D channel, the default for the key scan mode, so the printed circuit board is pasted with a 5.1k on the resistance bridge, static 1/2 VCC value. When used in the mode, the 5.1k resistance and may affect the accuracy.
    [2] Resistor PLC outside with different values, Unicom and positive end or the negative end, will be the formation of different A/D values in the port, and the command CPU for different treatment, this is the basic idea of key scanning.

    Technical points:

    [PLC126231B] input port, by a terminal row limit, configuration less, because some A/D export as a supplement to the input port, is a good way to. 1 A/D port, can replace the N input port, is very cost-effective in the economy, and the speed is high, has the very high price ratio.
    Need to pay attention to is, AD1 P1.0, the interior is connected with P4.2. While P4.2 has a disruption of the IO port, the pull-up current of 200uA, will have a certain effect on the scan button, the equivalent resistance of +5V end is equipped with a 25k//5.1k. But have lost only income, loss of near, do not talk to go up is good or bad.

    7 The 16 bit A/D [difference]

    [16] A/D PLC126231B for differential input, ADS1110 chip, 6-SOT23 package.
    The theoretical parameters of the chip as: voltage =2.7-5.5V, the conversion speed of =128 SPS, a built-in reference =2.048V, the number of channels of =1, interface for I2C.
Resolution of the differential input:
    [1] is the end range 0000-7FFFh
    [2] negative end range 8000-FFFFh
    The built-in 1-8 times the preamplifier, full scale with the magnification change:
    (1) X1 times: 0-2.048V
    (2) x2 times: 0-1.024V
    (3) X4 times: 0-0.512V
    (4) X8 times: 0-0.256V

    [PLC126231B] A/D, adopts the design of subminiature core, located near CPU, I/O port are arranged near the front, die attach, negative resistor paste, +5V power after two level filter after the power supply, away from all kinds of noise source, PCB 10x5mm occupation area. The process is in place.
    From the actual test situation, the effect is actually very obvious, 16 bit A/D, after preamplifier 8 times, accuracy is still up to [+/-]1 Bt, a resolution of about 7.8125 UV, with analytical grade level. (impedance =10k)

    Technical points:

    [PLC126231B] A/D, although the design for the poor, but also can be used for single ended, when using the AD- grounding, AD+ is connected with the input signal, but the resolution of 15, about 32000 of general purpose, is enough.
    The input is in the range of (0-2.048V) OR (0-256mV), measured at 0000-7FFFH, still has more than 1/10000 of the rate of resolution.
    The chip for direct input, without the use of a buffer, so high resolution based on the device, the general is very difficult to guarantee has the same matching precision, rather than the use of programmable amplifier in the interior of the more stable.

    8 synchronization [difference]

    [PLC126231B] the synchronization for the differential input, LM311 chip, SOIC-8 package.
    This is a very classic chip, the reliability is high, the use is very extensive.
    The theoretical parameters of the chip as: voltage =5-36V, the static current of =5-7.5mA, offset voltage =5-10mV, response time is =300ns, the voltage gain of the 150V/mV.
    If the input voltage is 5V, the differential resolution of 1mV, the precision is about one in 5000.

    PLC design for the differential input, is to be able to adapt to the remote synchronization.

    [1] in the input circuit, is connected in series with a 330 ohm current limiting resistor, and thereafter the configuration of the two group of diodes bridge, the input level limiting in (0-5V) [+/-] (0.7V), so as to ensure the safety of the chip.
    [2] in the input circuit, the grounding resistance, the line impedance adjustment at around 5.1k, in order to prevent the line between generating unnecessary, parasitic oscillation.
    [3] "comparator input configuration impedance" is 5.1k, output and input between 1000000000000 of Europe's "positive feedback resistance", its typical lag is 25.5mv[5v/ (1M/5.1k) =25.5mv], to prevent duplication of pulse in switching process.
    The impact of the lag synchronization of input threshold is 25mv[25.5mv (forward conduction) -0.5mv (cut-off) =25mv].
    The synchronization threshold of higher accuracy, the ratio of executions in "positive feedback resistance" and "the input impedance of the configuration".
    The synchronization threshold too high precision, interference may fall induced by repetitive pulse, must can be measured.
    [4] The default circuit synchronization mode of silicon controlled rectifier, in the input circuit, a 0.22uF capacitor to ground adapter, which for the 50Hz AC power supply, is a must, but if used for high frequency synchronization, is too big, need according to the actual conditions, make appropriate adjustments.

    Technical points:

    [PLC126231B] the synchronization, although the design for the poor, but also can be used for single ended, when using the Vp- Vp+ signal can be connected to ground,
Synchronization hardware, usually the response time is very fast, generally between 250K-1MHz, the key lies in the processing speed of CPU.

    9 other

    [PLC126231B] in the output circuit, parallel LED luminous tube, indicating the state of the output, high Weiliang, low off.
    In American row of terminals, LED luminous tube after the current limiting resistor;
    In the European style row of terminals, LED luminous tube before the current limiting resistor;
    Under abnormal condition, cause insurance resistor burned out:
    [1] American terminal row in the luminous tube is not bright, indicates the output terminal state;
    [2] A luminous tube may be bright European style row of terminals, indicates the status of the drive;
    [3] the two have some differences in function.

    [PLC126231B] in the optical isolation input port, connected in series with a LED luminous tube, in addition to indicate its switch state, but also enhanced the reverse voltage of photoelectric isolator.

    [PLC126231B] in the P4.2 input port, configured with interrupt function and buzzer driver function. The buzzer driver for 12V active drive dynamometer, even if the CPU is damaged, can work independently.

    The PCB, with a display buzzer state of the LED luminous tube, and the sound of it is synchronous starting, otherwise is wrong.
    [PLC126231B] in the Da output circuit, the use of operational amplifier with isolation, this will make the switching speed and noise coefficient of operational amplifier, but also into the output circuit, has a certain effect on the precision, but the output load ability will improve a lot, a lot of good safety.
    Operational amplifier amplification of 2 times, one amplification is a times, using the noninverting amplifier classic, the working power supply for the 12V, through the multilevel filter, type 0-5V in the case of DA1, for 0-10V, DA2 for 0-5V.
    The working voltage of the operational amplifier is 12V, if the saturation voltage drop has 1-2V, 0-10V output, has basically reached the maximum value.
    Ratio adjustment of two resistance amplifier on the size of the output, the DA1 can change. In general, the ratio of 2:1, can make the output =0-10V, 1:1 ratio, can make the output of the =0-5V.
    Resolution of 0-10V is 0.2mV, 0-5V resolution is 0.1mV, the stability of + / - 1Bt, beyond the general purpose utility precision.
    Due to the use of single supply amplifier, data is zero, there exists the offset voltage of about 0-20mV, some of the requirements for the application of absolute zero, zero circuit must match with another button, can not be said to be a little regret.

    The design has the advantages of simplified, also not human, all the inputs and outputs of mouth, are equipped with a LED luminous tube as indicator, and is equipped with sound and light alarm. Visual position, intuitive display, and maintenance of software programming, and has a live irreplaceable experience.

    [guide] PLC126231B random evaluation software operation

    [ad24[126231].exe] [PLC126231B] is designed for customized special evaluation software, PC PC.

    1 [software ideas it is this]

    [1]plc embedded emdos operating system.
    [2] will P0 port, P1 port, P2 port, P3 port, P4 port, mapped into the unit database address 0100, 0101, 0102, 0103, 0104; we read and write to the address, like to read and write for the P export.
    [3] The sixteen bit data source of da1 and DA2, mapped to the address of the database (010ch, 010dh) and (010eh, 010fh) unit cell; we will be sixteen bits of data, in accordance with the low byte in the former, in the way after the high byte, then into these units, can be obtained at the output of the Da, analog.
    [4]ad3 and Ad4 are ten bit AD converter, automatic data acquisition by PLC, the results, in accordance with the low byte in the former, in the way after the high byte, mapped to the address of the database (011ah, 011bh) and (011ch, 011dh) unit unit; us from these addresses read AD3, Ad4 data.
    [5]ad5 is a bit more complicated, it is a can of difference, also can be sixteen bit AD single ended, preamplifier with 1-8 times. But it only four speed settings, or 1 times, 2 times, 4 times, 8 times, and identified by d0 and D1 database 0103.
    00: 1 times;
    01: 2 times;
    10: 4 times;
    11: 8 times.
    PLC according to the 0103 d0-d1, automatically configured pre put a lot, and the data will be collected, in accordance with the low byte in the former, in the way after the high byte, mapped to the address of the database (011eh, 011fh) unit; us from these addresses read Ad5 data.

    2 [hardware idea of it is that]

    [1]usb serial port
    Must first matches with a good PC com port. In your PC, there may be a serial port, there may be no serial; serial no PC, need to buy a USB to serial parts; there are many sellers online, you need to choose a suitable for their own operating system products.
Technical points: you have to ask to buy good professionals, and the installation of the product. Use a different USB port, will produce different com mouth. 98 series of windows, according to the access time is USB port, serial port address dynamic allocation;
    Windows XP and windows 7 is a USB port, serial port address of the stationary distribution, there is a large difference between the two.
    Of course, in the windows, can also modify the serial port address, it relates to a more professional personage. Anyway, as long as you remember the COM port address on the line, each time you use PLC, should try to keep the original address unchanged.

    [2] mouse technique
    We used the mouse left key, a right key, there are points, also called is key, anti bonding points, which are key = left key, the anti bonding = right key.
    Click the mouse button, click, double-click the two methods. On some occasions, the function will have the very big difference, for beginners to master this technique about!

    [3] serial port parameter
    Used for the first time, we must be in the "export address" and "baud" on edit, fill in the correct parameters.
    Technical points: port address refers to the serial port address, also is the above require you to remember the com address on the mouth, now send use. Baud rate refers to the serial baud rate, the general default is 115200. Now PC can almost perfectly support the speed. Ten years ago this isn't about, some of the old machine, is only up to 28800.

    [4] The RS-422 plugin
    Because the PLC is the RS-422 protocol, so you must add a RS-422 to the RS-232 plug-in, and with a good 5V power supply, communication lines connected PLC to PC.

    [5] The software installation
    [xp] executable file installation []:
    The package [em] file in the root directory C by drag and drop.
    The ad24[126231].exe file drag and drop on the desktop.
    And then double-click the ad24[126231].exe file.
    If the use of external USB serial port, you must first install the driver.

    [6] file to start the
    The work of 12V power on PLC, double-click the PC desktop as EXE file, will whisk test window.


    The window is composed of a plurality of modules:

    3 [data] instrument oscillograph

    The X axis is the serial number, the default is 100.
    The Y axis as a data value, the default is automatic range.
    The so-called automatic range refers to, according to the Y axis will be display quantity, automatically calculate the coordinates of the maximum and minimum value, in order to achieve the best display effect.
    The lower left corner there is a parameter memory function keys.
    The upper left corner with a screen lock function keys 16 bit A/D random evaluation software, with 8 times the pre amplifier, the static precision of [+/-]1 Bt, a resolution of about 7.8125 uv.

    AD5 is a 16 bit precision, the differential input;
    (+ end) > (end) of the range for 0000-7FFF
    (+ end) < (end) of the range for 8000-FFFF
    The output is with rational sign digit number.
    In order to avoid data in the display of the unnecessary confusion, therefore, PLC through the resistance bridge 10K, in addition to the differential input configuration around 2.50V, and intends to make (+ end) equipped with super 1-10mV, make static data value, falling into the positive range, in order to facilitate software testing.
    AD5 full scale and a large number of associated preamplifier:
    [1] X1 times: 0-2.048V
    [2] x2 times: 0-1.024V
    [3] X4 times: 0-0.512V
    [4] X8 times: 0-0.256V
    (+ end) to ground short-circuit display 0000,
    (end) of short connected display for 7FFF,
    8 times the pre put a lot, full range is 256mv, the resolution of about 7.8125 UV, static is about [+/-]1 Bt.

    4 [DA1, DA2], the data controller

    DA1, DA2 for a 16 bit precision, considering that in order to facilitate the test, control parameters change is high 8.

    5 [da3, Da4 and i/o output port controller]

    Ad4 AD3, the precision of 10 bits, up to [+/-]1 Bt, because the resistance bridge circuit board with 5.1k, open circuit should be 1/2vcc range.
    AD channel single end mouth, factory default for key mode. If you want to change to other modes, the need for resistance element on the circuit board, as appropriate adjustments and modifications, please carry on under the guidance of professionals.

    6 serial port and calibration parameters [controller]

    Used for the first time, please enter the address and the serial baud rate correctly, and can press the "memory function key" to backup.

    7 [] oscilloscope parameter controller

    When the power is on, the Y axis is usually the default automatic mode, sampling time and the X axis, can be determined according to the "configuration"

    [PLC126231B] random evaluation software, simple operation, intuitive display, the general PCB can be found in most faults, especially some A/D and D/A in the dynamic parameters, has very high practical value, I hope you will like it.

    Welcome to our store, what is wrong, please leave your opinions!

 

 
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