[ACR220E ACR220E, new original, large inventory, supplier of the lowest price and constant open Electric Co., Ltd. welcome customers to inquire, thank you! 13486766633 company dedicated telephone 0577-62819667 company has professional technicians, can [ACR220E] control system provides good technical support and pre-sales, sales, after-sales service. Model | Price | Photos | Description | Parameters | manufacturers. We will do our best to provide you with accurate, the digital communications RS485 communication connection PZ568E provide serial the asynchronous part-RS458 communication interface, MOD-BUS-RTU protocol, a variety of data in mind interest rates can be transmitted on the communication lines. On a line can be connected to up to 32 network power meter, each network power meter can be set to Address (Address No.), different communication terminals number of different series of instruments, the communication connection should be used with copper network of shielded twisted pair wire diameter not less than 0.5mm. Wiring should be used for the communication lines away from power cables or other strong electric field environment, the party workers recommend using the type of network connection, do not recommend using a star or other connection. MODBUS / RTU communication protocol MODBUS protocol using the main connection from response mode of communication in a communication line. First, the host computer signals addressed to a single address of a terminal device (slave), and then, the terminal equipment sent a response signal is transmitted in the opposite direction to the host, i.e.; along in a separate communication line signal forward to the two opposite directions to transfer all communication data stream (half-duplex mode). MODBUS protocol allows communication between the host (PC, PLC, etc.) and terminal equipment, but does not allow the exchange of data between the independent terminal equipment, so that each terminal equipment is not to occupy the communication line when they are initialized, but only limited response to the signal reaches the native query. The Host Query: query message frame including device address code, function people code, data code, check code. Address code that slave devices to be selected; tell the function code selected from the equipment to perform what function, for example, function code 03 or 04 is to require their content read from the device registers and return; data segment contains device to perform the function of further additional information, such as where register starts reading the number of registers in the read command, the data segment of the additional information; checksum is used to verify a correctness of the information from the device is provided a verification whether the content of the message is the right way, it CRC16 calibration rules. Slave response: to produce a normal response from the device in response to the message from the machine address code, function code, data code and CRC16 checksum. The data code including data collected from the device: such as register values ??or status. If an error occurs, we agreed that the slave does not respond. Transmission mode refers to a series of independent data structure of a data frame, and means for the transmission of data finite rules, defined below, the transmission mode is compatible with the MODBUS protocol-RTU mode. Bits of each byte: a start bit, 8 data bits (parity bit), one stop bit (parity bit) or 2 stop bits (no parity) . Energy metering, energy metering and pulse output, 2-way power pulse output function and RS485 digital interface to complete energy data display and remote. Meter 3 rows of 12 LEDs achieve active energy (forward), reactive energy (inductive) side data shows that the right that the positive active energy data degrees = 369587.28kWh (of);-level open light the decoupling energy pulse relay (resistor signal) active energy (forward) and reactive energy (reverse) remote, remote computer terminals, PLCs, DI switch the acquisition module acquisition instrumentation of the total number of pulses to achieve energy accumulated measured. Hugh output with output mode or way of precision inspection of the electrical energy (national measurement procedures: standard table pulse error comparator method). The electrical characteristics of collector switch voltage VCC ≤ 48V, current Iz ≤ 50mA. The pulse speed fastest pulse constant 3200imp/kWh than 200mS. Its significance: pulse output when the instrument cumulative 1kWh number N (3200) a 1kWh electricity energy data needs to be emphasized that, in the case of PT, CT, the N data corresponding to a pulse side electricity 1kWh × voltage transformation ratio ER PT × CT. Application examples the PLC terminal using pulse counting means, it is assumed that within the period of time in the length t acquisition pulse number N, the input of meter is: 10kV/100V 400A/5A the period instrument energy accumulated as: N / 3200 × 100 × 80 degrees electricity. Note 1, before using instrumentation required to power after 15 minutes. 2, pay attention to prevent vibration and shock, do not use excessive dust and excessive harmful gases. 3 input wires should not be too long, as the measured signal input terminal longer Try shielded twisted pair cable. 4, if the signal is accompanied by a high-frequency interference, should be online trial low-frequency filter. 5, prolonged storage when not in use, energized once every three months, at least four hours. 6, the long-term preservation should avoid direct sunlight and should be stored at ambient temperature -25 ° C ~ 55 ° C. 7, such as instrument no display, you should first check the auxiliary power supply voltage range. 8, such as the display is not normal, check whether the input signal and the signal terminals are tight. 9, unless the PT has enough power, otherwise you can not use the PT signal at the same time as an auxiliary power supply, to ensure that the instrument work. The 10 CT circuit current terminal screws be sure to tighten, to ensure that the inlet / outlet reliable contact, in order to avoid failure. 11 To check the instrument calibration equipment should be better than 0.1, in order to ensure calibration accuracy. 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