Technical specifications

Настройка платы BMS Display осуществляется по шине CAN (может использоваться любой разъём P3, P4 или P5). Плата BMS Display является подчинённым устройством сети CANopen.

Настройки по умолчанию для доступа к плате по шине CAN:

• скорость передачи данных, кбит/с — 250;
• идентификатор в сети CANopen — 20.

Для настройки и мониторинга состояния платы используется программа ElectricDeviceMonitor:

Чтобы начать работу с платой необходимо в меню главного окна ElectricDeviceMonitor выбрать раздел «Tasks – Monitor – BMS Display 1.x». Откроется окно для выбора параметров подключения к плате:

Подключение к плате BMS Display осуществляется с помощью USB-CAN адаптера. Программа ElectricDeviceMonitor поддерживает адаптеры

Systec USB-CANmodul1,

PEAK PCAN-USB

Marathon CAN-bus-USB

Msovio

. Поддержка других преобразователей – по запросу.

После изменения параметров подключения необходимо нажать на кнопку «Launch monitor». Откроется окно с параметрами и состоянием платы BMS Display 1.x:

The device parameters are divided into the following groups:

• Info – a name and a version of the device, a version of the firmware;
• CAN – parameters of the CANopen communication;
• Display options – parameters of the device and errors indication;
• Low battery level signal (single beep) – parameters for signaling that the battery has a low charge level;
• Battery discharged signal (three beeps) – parameters for signaling that the battery is empty;
• Charger connected/disconnected signal – parameters for signaling that the charger is connected or disconnected;
• Commands – commands to the device.

Info group contains the following parameters:

• Device name – a name of the device in the CANopen network (“BMS Display”);
• Hardware version – a version of the board;
• Software version – a version of the firmware.

CAN group contains the following parameters:

• CANopen Node ID – an identifier of the device in the CANopen network (20 by default);
• CAN baud rate – CAN bus speed, kbps;
• BMS Main Node ID – an identifier of the BMS controller in the CANopen network (32 by default);
• Heartbeat – a flag for sending Heartbeat messages;
• Heartbeat period – a period of sending Heartbeat messages, millisecond;
• Ignore NMT messages – a flag for ignoring command messages in the CANopen network.

Display options group contains the following parameters:

• Disable display – a flag for turning off the LED display;
• Backlight always on – a flag for turning on the backlight of the LCD display;
• Backlight always off – a flag for turning off the backlight of the LCD display;
• Turn off display when idle – a flag for turning off the display after 2 minutes of inactivity (press the button to activate the display);
• Disable buzzer – a flag for turning off the buzzer;
• Errors filter – a filter of errors that should be output to the display.

Errors filter is a 32-bit word which is written in the hexadecimal notation. Each bit of the word corresponds to an error. If the bit is set to “1”, the device signals about the error corresponding this bit. The list of bits and errors is in the table below.

For example, it is necessary to signal about the following errors:

• Low DCH temperature (bit 3);
• HYG offline (bit 13);
• Contactor high temperature (bit 17).

In this case Errors filter should be equal to the «22008» value. This value is calculated the following way:

2³ + 2¹³ + 2¹⁷ = 8₁₀ + 8192₁₀ + 131072₁₀ = 139272₁₀ = 22008₁₆

If the value is set to the Errors filter field, the errors above will be output to the display.

Low battery level signal (single beep) group contains the following parameters:

• SoC minimum value to signal – a charge level of the battery, upon reaching which a sound signal is emitted, %;
• Signal period – a period of the sound signal, second;
• Loudness – volume of the sound signal (Quiet or Loud).

Battery discharged signal (three beeps) group contains the following parameters:

• SoC minimum value to signal – a charge level of the battery, upon reaching which three sound signals are emitted, %;
• Signal period – a period of the sound signals, second;
• Loudness – volume of the sound signals (Quiet or Loud).

Charger connected/disconnected signal group contains the following parameters:

• Signal duration on charger connected – duration of the sound signal (one beep) emitting if the charger is connected to the battery, second;
• Signal duration on charger disconnected – duration of the sound signal (two beeps) emitting if the charger is disconnected from the battery, second.

Commands group contains the following parameters:

• Test display – a command for testing the display (all symbol segments of the display will be activated);
• Test buzzer – a command for testing the buzzer (loud signal, quiet signal and a pause will be emitted alternately);
• Reset and start loader – a command to reboot the device and start the bootloader for updating the firmware.