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1. Promag 400 flowmeter 485 communication register address parameter
The Modbus RTU communication register address of Promag 400 (Endress+Hauser electromagnetic flowmeter) is distinguished by functional groups, and the core parameters are based on the E+H 2023 official communication manual
I. Basic Communication Specification 1 Default communication parameters of the device: baud rate 9600bps, no parity check, 8-bit data bit, 1-bit stop bit, default slave address is 12 Address format description: Register addresses are divided into offset addresses (counting from 0) and Modbus standard numbers (counting from 1), with a difference of 1. They need to match the configuration rules of the master station software. 2. Read only input trace registers (corresponding to the 04 function code, can only read process data and device status) Instantaneous flow register: offset address 00000 (corresponding to Modbus standard number 40001), 32-bit IEEE754 floating-point number, measurement unit set locally with the flow meter (such as m ³/h, L/min) 2. Total cumulative flow register: offset address 00002, 32-bit IEEE754 floating-point number, cumulative total flow measurement value 3 Running status register: offset address 00004, 16 bit unsigned integer, containing device running status, fault alarm code 4 Sensor diagnostic register: offset address 00005, 16 bit unsigned integer, including self check results such as electrode contamination, empty tube, and abnormal dielectric insulation
3. Read/write hold register (corresponding to 03/16 function code, can read or modify device configuration parameters) 1 Basic configuration group (offset address starting from 00100) 1 Upper limit of flow range: offset address 0010
IV. Version adaptation instructions 1 Promag 400 with different firmware versions may have slight register offset differences. It is recommended to refer to the official communication manual provided with the device When reading and writing 32-bit floating-point numbers, it is necessary to strictly follow the default big end byte transmission order of the device to avoid data parsing errors Before modifying the equipment parameters, it is recommended to pause the measurement process and lock the equipment operation status to prevent affecting the production measurement accuracy. 2. Electromagnetic flowmeter 485 communication bus, we can help you answer the core points of the electromagnetic flowmeter 485 communication bus, including communication distance, equipment load capacity, bus characteristics, and construction specifications. Specifically, the communication distance is as follows: In theory, the communication distance of the electromagnetic flowmeter 485 bus can reach 1200 meters in an ideal environment (high-quality fuel section
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