Fonrich FR-DCMG-MMPY Manual de usuario

User Manual

Version 4.2

DC System Monitor：FR-DCMG-MMPY

丰郅（上海）新能源科技有限公司

Fonrich (Shanghai) New Energy Technology Co., Ltd.

Add: 1st Floor, Building 5, No.999 Jiangyue Road, Minhang District,Shanghai

Web: www.fonrich.com

Tel: +86 21 61679671

Email: [email protected]

Table of Contents

Product description.......................................................................................................................................... 3

The main function..................................................................................................................................... 3

Documentation statement......................................................................................................................3

Terminal definition....................................................................................................................................4

Controller connection diagram............................................................................................................. 5

Ground connection and communication shield............................................................................... 6

Operation interface display............................................................................................................................ 7

Key operation............................................................................................................................................. 7

Initial interface display............................................................................................................................. 7

Histogram interface.......................................................................................................................... 7

Channel current and power generation display interface..................................................... 9

Parameter setting interface..................................................................................................................10

Current calibration setting interface..........................................................................................10

Software version number display interface............................................................................. 10

Alarm status display interface............................................................................................................. 11

Channel arc fault alarm interface................................................................................................11

Fault alarm clear interface............................................................................................................ 11

Items that can generate alarms can be set..............................................................................12

Alarm conditions..................................................................................................................................... 12

Alarm message................................................................................................................................ 13

MODBUS Protocol definition.......................................................................................................................14

Communication format configuration...................................................................................... 14

Data frame format description (refer to Modbus RTU standard)......................................14

Function code description............................................................................................................ 14

Register description........................................................................................................................15

......................................................... 15

..........................................28

Appendix........................................................................................................................................................... 34

FAQ..............................................................................................................................................................34

Document revision record.................................................................................................................... 35

Contact us................................................................................................................................................. 37

Product description

FR-DCMG DC monitor products are mainly used in DC power transmission and distribution,

such as photovoltaic combiner boxes, DC cabinets, telecommunications equipment rooms

and communication base stations. It communicates with the host computer through RS485

or industrial wireless. Its main function is to monitor the current of each branch in the DC

system, the bus voltage, the temperature of the cabinet, the status of the lightning arrester

and the status of the DC breaker. It can realize automatic alarm for abnormal conditions and

real-time detection of the presence of harmful arcs in the DC circuit.

The main function

•

Monitoring function: Real-time monitoring of the generation current, voltage,

temperature of the combiner box, lightning arrester status, DC circuit breaker status,

and DC arc fault status of each photovoltaic string in the combiner box, and

communicate with the host computer through RS485.

•

Display content: For the detected voltage, current, temperature, switching state,

power generation and other data, the FR-DCMG-MMPY can display a histogram

interface through the LCD to read the current and other data more intuitively.

•

Alarm function: It can be configured to open or close the alarm according to the

actual needs of the scene. When the alarm occurs, the interface will pop up an alarm

message.

•

Current calibration: identify zero drift and improve the accuracy of current

identification. (Default off)

•

Compatibility:Program compatible model FR-DCMG-MMPD products

Documentation statement

This manual is applicable to the monitoring host whose model is FR-DCMG-MMPY.

The software version is A0F2.

See page 11 for software version viewing method

Terminal definition

Symbol

Meaning

PV+ . PV-

PV DC bus power supply terminal

Not connecion

A.B

RS485 Communication terminal

Fixed Ground terminal

TS1.TS2

Externally connected temperature sensor terminals

Temperature sensor and digital input ground terminal

DI1.DI2.DI3.DI4

4 digital input terminals

FUC

Can connect modules with FUC interface

FMB

Modules with an FMB interface can be connected, such as the FR-DCMG-AS4A

DC Arc Detector.

Controller connection diagram

Ground connection and communication shield

The FG terminal of the FR-DCMG must be grounded, otherwise communication will

interfere and the reliability of the device will decrease. The grounding wire should be

grounded nearby. The grounding wire should be no more than 15cm from the “FG”

terminal to the bottom of the combiner box. It is recommended to be within 10cm. The

shorter the better, the thicker the better. The bottom of the combiner box should be

connected to the ground. The main control unit module is fixed on a standard guide rail

with a width of 3.5 cm.

The wiring specifications of the communication shielded wire are shown in the figure above:

The wiring of on-site communication lines requires that the communication shield can only

be grounded at a single point, otherwise there will be a risk of lightning surge damage to

all equipment on the entire communication line during a lightning strike;

If you encounter a situation where communication line interference is too large to

communicate, you can refer to the figure above, and insert a high voltage capacitor C

<100nF between the shielded wire of each combiner box and the ground wire, and use

this capacitor to filter the shielding layer interference.

Operation interface display

Key operation

FR-DCMG-MMPY has four keys “ESC”, “-”, “+”, and “SET”.

"ESC" key is used to return to the default interface and cancel parameter setting;

“SET”key is used to enter the parameter setting mode, select the parameter to be set and

complete the setting of the parameter;

The "+" and "-" keys are used to scroll the screen and adjust parameters;

Press the "+" and "-" keys at the same time to display the software version interface;

Press the "ESC" and "-" keys simultaneously to display the current calibration interface;

If there is no key operation for 10 seconds, the interface will automatically jump to the

default interface of the current mode, and the brightness will decrease after 5 seconds.

Initial interface display

The factory default is Modbus mode. When the host computer is connected to the

device via RS485 and communicates, the LED lights “R” and “P / T” will flash

alternately to indicate normal communication. When the device is not connected to

communication, it restarts by default every 5 minutes, or you can turn off the default

restart function, which can be turned off through the 0xF003 register.

Histogram interface

The histogram interface is the default display interface of Modbus mode, as shown

below:

The histogram in the figure shows the current value detected by each channel. The

initial interface display range is: -2A ~ 10A. You can also set register 0x0B16, which

displays -2A ~ 20A and -2A ~ 30A. Because a six-channel Hall sensor is connected, every

six channels are distinguished during display, and the current channels are from 1 to 24 in

order from left to right. The order of the current channels can also be set in reverse order.

The lightning icon in the upper left corner indicates that the FR-DCMG-MMPY horn-

connected Hall sensor with arc monitoring function; "24" indicates the current online arc

and current channel number; "1111" indicates the real-time status of the digital input DI1

~ DI4; "1250V" Represents the real-time voltage value of the bus. If there is no key

operation within 5 seconds, the screen brightness will decrease.

Channel current and power generation display interface

In the histogram mode, press the "+" or "-" key to enter the channel current and

power generation display interface. The current value and cumulative power generation of

each channel are displayed on the screen. When the "+" key is pressed first, the digital

value of the current is displayed first, and when the "-" is pressed first, the digital value of

the current is displayed first

The value of cumulative power generation. When viewing the values of current and

cumulative power generation, you can scroll through the screen by continuing to press the

"+" or "-" key. After the current display is completed, continue to press the "+" key to start

displaying the cumulative power generation. The figure above shows the current display

interface. “CH1:” in the figure indicates that the current value monitored by channel 1 in

real time is “6.929A”, and so on.

The figure below shows the cumulative power generation display interface. "CH1:" in

the figure indicates that the cumulative power generation of channel 1 is "6.929kwh", and

so on.

Parameter setting interface

In the histogram interface, press the "SET" key to enter the Modbus parameter

setting interface. The Modbus parameter setting is as follows:

•

ADDR: The communication address of the Modbus slave node, the range is 1 ~ 247 (default is

247).

•

PAR: The data verification method of Modbus communication. The optional parity (None), odd

parity (Odd), even parity (Even), and no parity by default.

•

BPS: Baud rate for Modbus communication. The selectable baud rates are 2400, 4800, 9600

(default), 19200, 38400.

Current calibration setting interface

Press the "ESC" and "-" keys at the same time to enter the current calibration setting

interface, as shown below:

To use this feature, please contact the company's technical support staff.

Software version number display interface

In the histogram interface, press the "+" and "-" keys at the same time to enter the

software version number display interface, as shown below:

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