HART communication protocol
HART communication adopts half-duplex communication mode, which is characterized by realizing digital signal communication on the existing analog signal transmission line. It is a transitional product during the transition from analog system to digital system, so it has strong market competitiveness and develops rapidly. HART specifies a series of commands that work according to the command mode.
Profibus communication protocol
On March 15, 1996, Profibus was approved as a European standard, that is to say, this product has been accepted by ordinary flat panels in the world market, and its market share occupies the S position in the European market; technically speaking, Profibus meets field-level data during production. The important requirements of storage, on the one hand, cover the communication requirements in the sensor/actuator field, and on the other hand, it has all the network communication functions in the unit-level field, so Profibus has become a de facto internationally recognized standard.
Profibus is an open, manufacturer-neutral fieldbus standard. Mainly used in the following fields. (1) Manufacturing automation: automobile manufacturing (robots, assembly lines, stamping lines, etc.), paper making, textiles, etc. (2) Process control automation: petrochemical, pharmaceutical, cement, food, beer and other industries. (3) Electricity: Power generation, transmission and distribution. (4) Buildings: air conditioners, fans, lighting. (5) Railway traffic: signaling system.
The Profibus system adopts the RS-485 physical connection mode, and the data transmission rate is optional from 9.6KB/s to 12Mb/s. The maximum number of slave devices that can be connected to each network segment is 32. When the number of devices exceeds 32, or when expanding the network range, it is necessary to use repeaters to connect different network segments. The characteristics of Class A cables specified by the Profibus standard are as follows.
Characteristic impedance: 135~165Ω
cable capacitance. <30PF/m
loop resistance. 0.64mm
Cable core cross section. >0.34mm², wire size AWG22
Modbus was released in 1979 by the company Modicon (now Schneider Electric) for communication using programmable logic controllers (PLCs). Modbus has become the industry standard for communication protocols in the industrial field
Modbus RTU
Modbus RTU is a relatively simple fieldbus protocol for simple communication between master and slave stations (actuators-sensors). SIPOS actuator supports RTU version. Access to all process data and setting of all actuator parameters is supported by a Modbus RTU slave connection in FRY, in addition to reading actuator information. Like PROFIBUS, the physical connection is via RS-485 or fiber optic cable.
Modbus TCP/IP
Same functionality as Modbus RTU The physical connection is via an external M12 connector in the Ethernet physics.
Shielding layer: copper mesh shielding or fabric shielding and aluminum foil shielding
Technical indicators
★Adjustment times: The number of starts can reach 600 times/hour.
★ Motor insulation level. F;
★ Motor working system. S2;
★Basic error limit: ≤±1.0%.
★Return difference: ≤1.0%.
★Repeatability error of stroke control mechanism: ≤1.0%.
★ Protection level. IP67 (IP68 optional).
★Explosion-proof type. Explosion-proof grade: ExdⅡBT4. power supply
★ Voltage: single-phase 220VAC, 50/60Hz; three-phase 380VAC±10%, 50/60Hz. Error: frequency ±1%; harmonic content <5%. environmental conditions
★ Ambient temperature: -30℃～+70℃.
★ Relative humidity: ≤95%; FRY electric actuator
★Atmospheric pressure: 86kPa～106kPa. Storage conditions
★ Ambient temperature: -10℃～+45℃.
★ Relative humidity: ≤85%, in a ventilated room, the surrounding air does not contain harmful substances that corrode the product.
>Profibus DP
>Modbus RTU
>FF Foundation Fieldbus
>HART
>Bluetooth communication control (optional)
Strict quality management, testing and testing procedures
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Strict quality management, testing and testing procedures
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