Description
SPDSI22 Robot control card
SPDSI22 Robot control card
Module Clips Drive controller servo motor
Contact: Mr. Lai
Wechat:17750010683
Whats app：+86 17750010683
Skype：+86 17750010683
QQ: 3221366881
3221366881@qq.com
Analysis of PLC”s most basic serial communication
When using PLC, electric power operators will be exposed to many communication protocols and communication interfaces. Do you know the most basic PLC serial communication and basic communication interfaces?
Serial port is a very general device communication protocol on the computer (don”t confuse it with Universal Serial Bus or USB). Most computers contain two serial ports based on RS232. The serial port is also a common communication protocol for instruments and meters; Many GPIB compatible devices also have RS-232 ports. At the same time, the serial communication protocol can also be used to obtain data from remote acquisition equipment.
Serial communication is completed with three wires: (1) ground wire, (2) transmission, and (3) reception. Because serial communication is asynchronous, the port can send data on one line and receive data on another line. Other lines are used to shake hands, but are not necessary.
The most important parameters of serial communication are baud rate, data bit, stop bit and parity. For two ports to pass, these parameters must match:
a. Baud rate: This is a parameter to measure the communication speed. It represents the number of bits transmitted per second. For example, 300 baud means sending 300 bits per second. When we mention the clock cycle, we mean the baud rate. For example, if the protocol requires 4800 baud rate, the clock is 4800Hz. This means that the sampling rate of serial communication on the data line is 4800Hz. Generally, the baud rate of the telephone line is 1440028800 and 36600. The baud rate can be much larger than these values, but the baud rate is inversely proportional to the distance. The high baud rate is often used for communication between closely placed instruments.
b. Data bit: This is a parameter to SPDSI22 Robot control card measure the actual data bit in communication. When the computer sends a packet, the actual data will not be 8 bits, and the standard values are 5, 7 and 8 bits. How to set depends on the information you want to send. For example, the standard ASCII code is 0~127 (7 bits). The extended ASCII code is 0 to 255 (8 bits). If the data uses simple text (standard ASCII code), then each packet uses 7-bit data. Each packet refers to a byte, including start/stop bit, data bit and parity bit. Since the actual data bit depends on the choice of communication protocol, the term “packet” refers to any communication situation.
c. Stop bit: used to represent the last bit of a single package. Typical values are 1, 1.5 and 2 bits. Because the data is timed on the transmission line, and each device has its own clock, it is likely that there is a small unsynchronization between the two devices in the communication. Therefore, the stop bit not only indicates the end of transmission, but also provides an opportunity for the computer to correct clock synchronization. The more bits applicable to the stop bit, the greater the tolerance of different clock synchronization, but the slower the data transmission rate.
d. Parity bit: a simple error detection method in serial communication. There are four error detection methods: even, odd, high and low. Of course, there is no check bit. In the case of even and odd parity, the serial port will set the parity bit (the bit after the data bit), and use a value to ensure that the transmitted data has even or odd logical high bits. For example, if the data is 011, for even parity, the check bit is 0, and the number of digits with high logic is even. If it is odd check, check bit 1, so there are three logical high bits. The high and low bits do not really check the data. Simply set the logic high or low to check. In this way, the receiving device can know the status of a bit and have the opportunity to judge whether there is noise interfering with communication or the data transmitted and received are not synchronized.
a. What is RS-232?
RS-232 (ANSI/EIA-232 standard) is the serial connection standard on IBM-PC and its compatible computers. It can be used for many purposes, such as connecting a mouse, printer or Modem, and also connecting industrial instruments and meters. For the improvement of drive and connection, the transmission length or speed of RS-232 often exceeds the standard value in practical applications.
RS-232 is only limited to point-to-point communication between PC serial port and equipment. The maximum distance of RS-232 serial communication is 50 feet.
b. What is RS-422?
RS-422 (EIARS-422-AS Standard) is the serial port connection standard of Apple”s Macintosh computer.
RS-422 uses differential signal and RS-232 uses signal of unbalanced reference ground. Differential transmission uses two lines to send and receive signals. Compared with RS-232, it can better resist noise and have a longer transmission distance. Better noise resistance and longer transmission distance are great advantages in industrial environment.
c. What is RS-485?
RS-485 (EIA-485 standard) is an improvement of RS-422 because it increases the number of devices from 10 to 32, and defines the electrical characteristics under the maximum number of devices to ensure sufficient signal voltage. With the ability of multiple devices, you can use a single RS-422 port to establish a device network. Excellent anti-noise and multi-device capability. RS-485 will be selected for serial connection when establishing distributed device network connected to PC, other data collection controllers, HMI or other operations in industrial applications.
RS-485 is a superset of RS-422, so all RS-422 devices can be controlled by RS-485. RS-485 can use more than 4000 feet of cable for serial communication.
本特利Bently Nevada 模块 3500/93 135785-01
Bently Nevada本特利 133819-02 模块卡件
Bently Nevada本特利 140734-02 模块卡件
Bently Nevada本特利 163179-01 模块卡件
Bently Nevada本特利 3500/25-01-02-00 模块卡件
Bently Nevada本特利 125840-01 模块卡件
Bently Nevada本特利 128276-011 模块卡件
Bently Nevada本特利 135145-01 模块卡件
Bently Nevada本特利 3500/42-01-00 模块卡件
Bently Nevada本特利 3300/16 模块卡件
Bently Nevada本特利 133300-01 模块卡件
Bently Nevada本特利 3500/15-02-02-00 模块卡件
Bently Nevada本特利 176449-02 模块卡件
Bently Nevada 本特利bently 135489-01小卡
BENTLY本特利 3300/20-12-01-01-00-02-00 电源模块 转速模块
BENTLY本特利 3300/47-01-04-01-00 电源模块 转速模块
BENTLY本特利 3300/50-02-01-00-00 电源模块 转速模块
BENTLY本特利 330103-00-30-10-02-05 前置器探头 备件
BENTLY本特利 330130-040-01-00 前置器探头 备件
BENTLY本特利 330850-50-05 转速模块 振动模块
BENTLY本特利 330876-02-10-01-00 转速模块 振动模块
BENTLY本特利 3500/05-01-01-00-00-00 变送器 压缩机配件
BENTLY本特利 3500/05-01-02-00-01 变送器 压缩机配件
BENTLY本特利 3500/50-01-01-00-00 模块 3500系统
BENTLY本特利 3500/93-01-00-00-00 模块 3500系统
149986-01 Bently Nevada 本特利3500/33 前卡
本特利3500/15 106M1079-01 新款交流电源 BENTLY振动监测系统
本特利146031-01 机架接口模块Bently Nevada I/O 模块
125680-01 本特利内华达 BENTLY前置器 I/O 模块
3500/50 133442-01 BENTLY本特利 带内部终端的 I/O 模块
BENTLY本特利57552系统输出模块
BENTLY本特利 2711P-RDK7C 系统模块
BENTLY本特利 45C-341 系统输出模块
BENTLY本特利 2711P-RDB7CK系统模块
BENTLY本特利 2711P-RDB7CM系统模块
Bently 125840-01 本特利 高压交流电源输入模块 module
3500/15 127610-01 BENTLY 本特利电源模块 module
内达华BENTLY本特利3500/53 133388-01电子超速检测系统模块
内达华BENTLY本特利106M1081-01
60M100-00 Bently本特利内达华监测系统模块
Bently本特利3500/42M 监测模块前后卡原厂3500全系列供应
BENTLY本特利16通道继电器模块3500/33 149986-01
BENTLY本特利通信网关模块3500/92 136180-01
BENTLY本特利3500检测系统 接地模块3500/04
BENTLY本特利3500/20 125744-02机架接口模块 大小卡出售 货源稳定
3500/15 127610-01本特利BENTLY电源模块 3500全系列大量供应
BENTLY本特利3500/25 184684-01键相模块 3500检测系统
3500/92 Bently本特利通讯模块使用说明
Bently本特利3500/32 125712-01通讯模块
本特利3500/42M 176449-02 前置器/地震监测器 工业电源
本特利Bently 3500/15电源模块，库存出售
本特利 3500/32M 4通道继电器模块 瞬态数据接口
BENTLY 3500/94 VGA 本特利显示模块 PWA 145988-01
3500/33-01-01 本特利 3500/53-03-00 监测器模块 3500/33-01-00
Bently Nevada 3500/40M 176449-01 本特利 3500-40M模块 3500/40
本特利 3500/92 136180-01 通讯网关模块 DCS数控系统
Bently Nevada 3500/42E 振动监测器 285691-01 本特利 3500-42E
BENTLY 本特利 3500/63M 气体检测模块 3500/63 3500系统 3500-63
BENTLY 本特利 3500/72M 176449-08 3500系统模块 350072M
BENTLY 本特利以太网通讯网关 3500/92 与3500框架组件和数据通讯
1900/65A-01-01-03-00-00 本特利 通用设备监视器
3500/70M 本特利监测器模块
136188-02 本特利以太网/RS232 Modbus I/O 模块
BENTLY 本特利直流电源模块 3500/15-07-00-00 原装进口 库存
Bently本特利 3500/33 149986-01 通道继电器模块 3500-33
BENTLY本特利 3500/50 133442-01 转速表监视器 PWA 286566-02
BENTLY本特利 3500/60 133811-01 温度监视器模块163179-01D
BENTLY本特利框架 3500/05-01-01-00-00-00 3500机箱 3500-05
本特利 3500/22 Bently Nevada 瞬态数据接口 后卡 ：146031-01
Company advantage service:
1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems
1.Has been engaged in industrial control industry for a long time, with a large number of inventories.
2.Industry leading, price advantage, quality assurance
3.Diversified models and products, and all kinds of rare and discontinued products
4.15 days free replacement for quality problems
All kinds of module card driver controller servo motor servo motor embedded card wires and cables Power module control module is applicable to steel, hydropower, nuclear power, power generation, glass factory, tire factory, rubber, thermal power, paper making, shipping, navigation, etc
ABB — AC 800M controller, Bailey, PM866 controller, IGCT silicon controlled 5SHY 3BHB01 3BHE00 3HNA00 DSQC series
BENTLY — 3500 system/proximitor, front and rear card, sensor, probe, cable 3500/20 3500/61 3500/05-01-02-00-001 3500/40M 176449-01 3500/22M 138607-01
Emerson — modbus card, power panel, controller, power supply, base, power module, switch 1C31,5X00, CE400, A6500-UM, SE3008,1B300,1X00,
EPRO — PR6423 PR6424 PR6425 PR6426 PR9376 PR9268 Data acquisition module, probe, speed sensor, vibration sensor
FOXBORO — FCP270 FCP280 FCM10EF FBM207 P0914TD CP40B FBI10E FBM02 FBM202 FBM207B P0400HE Thermal resistance input/output module, power module, communication module, cable, controller, switch
GE —- IS200/215/220/230/420 DS200/215 IC693/695/697/698 VMICPCI VMIVME 369-HI-R-M-0-0-E 469 module, air switch, I/O module, display, CPU module, power module, converter, CPU board, Ethernet module, integrated protection device, power module, gas turbine card
HIMA — F3 AIO 8/4 01 F3231 F8627X Z7116 F8621A 984862160 F3236 F6217 F7553 DI module, processor module, AI card, pulse encoder
Honeywell — Secure digital output card, program module, analog input card, CPU module, FIM card
MOOG — D136-001-007 Servo valve, controller, module
NI — SCXI-1100 PCI – PXIE – PCIE – SBRIO – CFP-AO-210 USB-6525 Information Acquisition Card, PXI Module, Card
Westinghouse — RTD thermal resistance input module, AI/AO/DI/DO module, power module, control module, base module
Woodward — 9907-164 5466-258 8200-1300 9907-149 9907-838 EASYGEN-3500-5/P2 8440-2145 Regulator, module, controller, governor
YOKOGAWA – Servo module, control cabinet node unit
Main products:
PLC, DCS, CPU module, communication module, input/output module (AI/AO/DI/DO), power module, silicon controlled module, terminal module, PXI module, servo drive, servo motor, industrial display screen, industrial keyboard, controller, encoder, regulator, sensor, I/O board, counting board, optical fiber interface board, acquisition card, gas turbine card, FIM card and other automatic spare parts
ABB — AC 800M controller, Bailey, PM866 controller, IGCT silicon controlled 5SHY 3BHB01 3BHE00 3HNA00 DSQC series
BENTLY — 3500 system/proximitor, front and rear card, sensor, probe, cable 3500/20 3500/61 3500/05-01-02-00-001 3500/40M 176449-01 3500/22M 138607-01
Emerson — modbus card, power panel, controller, power supply, base, power module, switch 1C31,5X00, CE400, A6500-UM, SE3008,1B300,1X00,
EPRO — PR6423 PR6424 PR6425 PR6426 PR9376 PR9268 Data acquisition module, probe, speed sensor, vibration sensor
FOXBORO — FCP270 FCP280 FCM10EF FBM207 P0914TD CP40B FBI10E FBM02 FBM202 FBM207B P0400HE Thermal resistance input/output module, power module, communication module, cable, controller, switch
GE —- IS200/215/220/230/420 DS200/215 IC693/695/697/698 VMICPCI VMIVME 369-HI-R-M-0-0-E 469 module, air switch, I/O module, display, CPU module, power module, converter, CPU board, Ethernet module, integrated protection device, power module, gas turbine card
HIMA — F3 AIO 8/4 01 F3231 F8627X Z7116 F8621A 984862160 F3236 F6217 F7553 DI module, processor module, AI card, pulse encoder
Honeywell — Secure digital output card, program module, analog input card, CPU module, FIM card
MOOG — D136-001-007 Servo valve, controller, module
NI — SCXI-1100 PCI – PXIE – PCIE – SBRIO – CFP-AO-210 USB-6525 Information Acquisition Card, PXI Module, Card
Westinghouse — RTD thermal resistance input module, AI/AO/DI/DO module, power module, control module, base module
Woodward — 9907-164 5466-258 8200-1300 9907-149 9907-838 EASYGEN-3500-5/P2 8440-2145 Regulator, module, controller, governor
YOKOGAWA – Servo module, control cabinet node unit
Main products:
PLC, DCS, CPU module, communication module, input/output module (AI/AO/DI/DO), power module, silicon controlled module, terminal module, PXI module, servo drive, servo motor, industrial display screen, industrial keyboard, controller, encoder, regulator, sensor, I/O board, counting board, optical fiber interface board, acquisition card, gas turbine card, FIM card and other automatic spare parts
