User Manual for Intelligent Multi channel Voltage and Current Collector:

I. Overview

The YK-DCD series intelligent multi-channel voltage and current collector uses a microprocessor for control and calculation, which can directly measure current within DC5A and voltage within DC500V. Paired with splitters/dividers of different measurement ranges, it can meet the requirements of various measurement ranges. Equipped with a display, it can achieve high-precision display, control, and transmission output of voltage and current. It is also equipped with RS485/RS232 communication modules, which can communicate with computers PLC、 Touch screen, display screen and other supporting displays are used to form a * measurement and control system.

This product is widely used in new industries such as new energy, high-speed rail, solar energy, and electric vehicle testing, leading the way in new scientific research. The product has high precision, strong adaptability to low temperature environments, separate isolation for each channel acquisition, and strong anti-interference performance.

Main features: Fully isolated multi-channel input.

Each channel has independent AD acquisition, with fast acquisition speed.

IIDC current collectorMain technical indicators:

Basic * Difference: 0.2% FS ± 1 word

Resolution: 0.1

Input signal: DC0-10A

Communication output: Interface mode - isolated serial bidirectional communication interface RS485/RS422/RS232/modem

Baud rate -9600bps internal free setting

Power supply: DC5V

Power consumption: 20W

Environmental temperature: 0-50 ℃

Environmental humidity:<85% RH

Dimensions: Length 295mm x Width 110mm x Height 60mm

IIIDC current collectorSelection:

4、 Communication instructions

This instrument can be equipped with RS232 and RS485 interfaces for direct communication with a computer. The RS485 standard communication distance is 1.5km, and multiple instruments can be attached. The RS232 standard communication distance is 15m, and only one instrument can be attached. The TXD, RXD, and GND of the RS232 interface are respectively connected to the second, third, and fifth pins of the computer serial port. The data format consists of 1 start bit, 8 data bits, no checksum, and 1 stop bit. To avoid communication conflicts, the instruments are all in listening mode. The computer sends a command to a certain instrument at a specified address, and then waits for a period of time for the instrument to respond. After the instrument receives the correct command, it sends out the data. After sending, the instrument is in listening mode again. In the same system, instrument addresses cannot be the same, and the baud rate must be *.

The instrument adopts the standard Modbus rtu communication protocol. When using configuration software, the device to be selected is a PLC with Modicon (* Kang), Modbus RTU address type, and integer 16 bit data. The Kingview register starts from 4001 or 4000, while other configuration software may start from 3001 or 3000. The communication is an integer, and users need to handle the decimal places according to the actual situation. Communication transmission data is signed integer data, and it is recommended to define signed integer data for user programming. When the data is greater than 0X8000, the actual negative value is obtained by adding 1 in reverse. For example, if the communication transmission data is 0XFFFF, the corresponding data value is -1. For long integer data such as cumulants, the data value is equal to the high-order x 65536+low order. During configuration, users can also choose the data type as long, and the system will automatically calculate the cumulative amount.

Read instrument data and send command format: It is recommended to read no more than 16 data at a time

On site measuring instruments return data format:

Write data to instrument and send command format: (Write to register)

Data format returned by on-site measuring instruments: (same as the data format sent)

Example: Read the first measurement value of the instrument with address 1 (PV1=1000);

The data sent is 01 03 00 00 01 84 0A;

The returned data is 01 03 02 03 E8 B8 FA (including 03 E8-1000);

Among them, 01 is the instrument address, 03 is the function number, 00 00 is the register starting address, 00 01 represents reading a number, 840A is the checksum, and B8 FA in the returned data is the checksum. If you want to read the first and second data, you can send 01 03 00 00 02 C4 0B, read 16 data and send 01 03 00 00 10 44 06;

Communication measurement value return value=(measurement value+error correction) * full-scale correction. The full correction range is 0.500-2.000, and users can also omit this measurement error correction and directly perform error correction on the upper computer;

The communication address range is 1-99, and the baud rate can be set to 2400 or 9600. The instrument has a default communication address of 248 (0XF8), which can be used for testing if the user is unsure. The baud rate is 2400 or 9600. After changing the communication address and baud rate, it needs to be powered on again to take effect;

The instrument has been set with a communication address of 1 and a baud rate of 9600 at the factory.

Register correspondence table (please refer to the setting section of the operating instructions for specific meanings).

Except for the measured values, all other data can be written

Example: Read the PV (PV=1000) value of the instrument with address 1

Send data as 01 03 00 00 00 01 84 0A

The returned data is 01 03 02 03 E8 B8 FA (where 03 E8-1000), where 01 is the instrument address, 03 is the function number, 00 and 00 are the register start addresses, 00 and 01 represent reading a number, 84 and 0A are check codes, and B8 FA is the check code in the returned data. If you want to read two data, you can send 01 03 00 00 02 C4 0B.

5、 Warranty

If it is a manufacturing quality problem caused by the factory, the instrument will be repaired free of charge from the date of leaving the factory. If the damage is caused by improper storage and use, the repair cost will be charged. The warranty period is twelve months, and the warranty period of 3-5 years must be specified separately.