摘要:
A measurement transmitter having an interface for transmission of measured values via a fieldbus, wherein communication via the fieldbus occurs according to a fieldbus protocol, wherein the number of measured values provided by the measurement transmitter exceeds the number of measured values retrievable by means of a basic command of the fieldbus protocol, wherein the measurement transmitter has a plurality of fieldbus addresses, and wherein a logic unit is provided, which serves so to distribute the measured values among the plurality of fieldbus addresses of the measurement transmitter that the measured values are retrievable via the plurality of fieldbus addresses of the measurement transmitter by means of the basic command.
摘要:
In connection with a method for the data exchange between an operating and monitoring program BA and a field device (10, 20, 30), which is connected via a field bus adapter (5) with the internet, the operating and monitoring program BA accesses a serial interface (8), which is connected with an internet interface (13). By means of this a data exchange between the operating and monitoring program BA via the internet is possible without extensive program changes.
摘要:
A tank side monitor includes two processor boards, a main/communication board, containing field communications interface circuitry and interface circuitry, and an optional IS module, containing HART interface circuitry. The two processor boards are link by an optically coupled serial communications bus. The HART circuitry is multiplexed and can be operated by either the Main/Communication board processor or a local processor on the HART IS board. The optional IS module, an extension of the HART IS board, provides options such as an IS 4-20 mA input or output or other IS I/O. The TSM employs a modular approach for hardware and software, whose implementation consists of a number of modules and programs, the first being the Main/Communications board software. Other programs are contained within the HART interface module. Due to the modular approach taken in the hardware design, the software is also modular and operates on two hardware modules: Main/Communications module software; and HART module software.
摘要:
A vehicle lock system has individual door locks each having an actuator provided with a printed circuit board on which a microcontroller, motor driver of the lock actuator, and a multiplexing element are encapsulated, the printed circuit board being mounted in the housing of the respective lock and being connected by the multiplexing element to a single-line data bus for binary communication with the individual lock from the central station.
摘要:
This invention relates to a universal device for sequentially sensing any input signals and providing any output signals, comprising; a microprocessor; a programmable memory for defining said input signals and said output signals at selected levels; multiplexers controlled by said microprocessor to sequentially select said input signals and said output signals; electrical components controlled by said microprocessor and programmable memory for generating a digital bit stream for each sequentially selected input signal and output signal; circuitry for translating said digital bit streams to an analogue signal; signal conditioning circuitry activated by said analogue signal for sensing any input signal and providing any output signal defined by said programmable memory.
摘要:
In connection with a method for the data exchange between an operating and monitoring program BA and a field device, which is connected via a field bus adapter with the internet, the operating and monitoring program BA accesses a serial interface, which is connected with an internet interface. By means of this a data exchange between the operating and monitoring program BA via the internet is possible without extensive program changes.
摘要:
A universal, programmable interface circuit which contains a plurality of controllable switches, a plurality of controllable multiplexers, at least one analog/digital converter, and at least one digital/analog converter. These components are activated, deactivated, or changed in their operating or switching states by means of control signals, wherein different functions can be assigned to each bidirectional input connection. Thus, each input connection can have a plurality of digital or analog functions for bidirectional exchange of data, measurement values, control signals, or the like between a computer and instruments of a technical process.
摘要:
There is disclosed a bus control device which reduces the data traffic amount of a parallel bus to enhance the performance of the bus control device. A local CPU (111) controls a serial bus transmission/reception controller (113) to give a transmission timing to a transmission interface (120). The bus transmission/reception controller (113) transmits to a serial bus a transmission frame formed by reading predetermined transmission data from a memory (112) storing addresses of a plurality of units (4) connected to the serial bus (51) and transmission/reception data to be transferred to the plurality of units. As a result, transmission/reception is performed with units connected to the serial bus (51) out of the plurality of units via the serial bus, the destination address and transmission data are read from the memory during transmission, and reception data is written to the memory during reception.