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Merge pull request #631 from dalathegreat/feature/SMA-LV-CAN
New inverter protocol: SMA Low Voltage 48V via CAN
This commit is contained in:
Daniel Öster
GitHub
commit
ae4d761891
4 changed files with 184 additions and 0 deletions
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@ -46,6 +46,7 @@
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//#define PYLON_CAN //Enable this line to emulate a "High Voltage Pylontech battery" over CAN bus
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//#define PYLON_CAN //Enable this line to emulate a "High Voltage Pylontech battery" over CAN bus
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//#define SCHNEIDER_CAN //Enable this line to emulate a "Schneider Version 2: SE BMS" over CAN bus
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//#define SCHNEIDER_CAN //Enable this line to emulate a "Schneider Version 2: SE BMS" over CAN bus
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//#define SMA_CAN //Enable this line to emulate a "BYD Battery-Box H 8.9kWh, 7 mod" over CAN bus
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//#define SMA_CAN //Enable this line to emulate a "BYD Battery-Box H 8.9kWh, 7 mod" over CAN bus
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//#define SMA_LV_CAN //Enable this line to emulate a "SMA Sunny Island 48V battery" over CAN bus
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//#define SMA_TRIPOWER_CAN //Enable this line to emulate a "SMA Home Storage battery" over CAN bus
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//#define SMA_TRIPOWER_CAN //Enable this line to emulate a "SMA Home Storage battery" over CAN bus
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//#define SOFAR_CAN //Enable this line to emulate a "Sofar Energy Storage Inverter High Voltage BMS General Protocol (Extended Frame)" over CAN bus
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//#define SOFAR_CAN //Enable this line to emulate a "Sofar Energy Storage Inverter High Voltage BMS General Protocol (Extended Frame)" over CAN bus
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//#define SOLAX_CAN //Enable this line to emulate a "SolaX Triple Power LFP" over CAN bus
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//#define SOLAX_CAN //Enable this line to emulate a "SolaX Triple Power LFP" over CAN bus
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@ -43,6 +43,10 @@
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#include "SMA-CAN.h"
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#include "SMA-CAN.h"
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#endif
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#endif
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#ifdef SMA_LV_CAN
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#include "SMA-LV-CAN.h"
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#endif
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#ifdef SMA_TRIPOWER_CAN
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#ifdef SMA_TRIPOWER_CAN
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#include "SMA-TRIPOWER-CAN.h"
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#include "SMA-TRIPOWER-CAN.h"
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#endif
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#endif
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166
Software/src/inverter/SMA-LV-CAN.cpp
Normal file
166
Software/src/inverter/SMA-LV-CAN.cpp
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#include "../include.h"
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#ifdef SMA_LV_CAN
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#include "../datalayer/datalayer.h"
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#include "SMA-LV-CAN.h"
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/* SMA Sunny Island Low Voltage (48V) CAN protocol:
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CAN 2.0A
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500kBit/sec
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11-Bit Identifiers */
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/* Do not change code below unless you are sure what you are doing */
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static unsigned long previousMillis100ms = 0;
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#define VOLTAGE_OFFSET_DV 40 //Offset in deciVolt from max charge voltage and min discharge voltage
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#define MAX_VOLTAGE_DV 630
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#define MIN_VOLTAGE_DV 41
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//Actual content messages
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CAN_frame SMA_351 = {.FD = false, // Battery charge voltage, charge/discharge limit, min discharge voltage
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.ext_ID = false,
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.DLC = 8,
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.ID = 0x351,
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame SMA_355 = {.FD = false, // SOC, SOH, HiResSOC
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.ext_ID = false,
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.DLC = 8,
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.ID = 0x355,
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame SMA_356 = {.FD = false, // Battery voltage, current, temperature
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.ext_ID = false,
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.DLC = 8,
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.ID = 0x356,
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame SMA_35A = {.FD = false, // Alarms & Warnings
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.ext_ID = false,
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.DLC = 8,
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.ID = 0x35A,
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame SMA_35B = {.FD = false, // Events
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.ext_ID = false,
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.DLC = 8,
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.ID = 0x35B,
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame SMA_35E = {.FD = false, // Manufacturer ASCII
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.ext_ID = false,
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.DLC = 8,
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.ID = 0x35E,
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame SMA_35F = {.FD = false, // Battery Type, version, capacity, ID
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.ext_ID = false,
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.DLC = 8,
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.ID = 0x35F,
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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CAN_frame SMA_00F = {.FD = false, // Emergency stop message
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.ext_ID = false,
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.DLC = 8, //Documentation unclear, should message even have any content?
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.ID = 0x00F,
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.data = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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static int16_t temperature_average = 0;
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void update_values_can_inverter() { //This function maps all the values fetched from battery CAN to the correct CAN messages
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//Calculate values
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temperature_average =
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((datalayer.battery.status.temperature_max_dC + datalayer.battery.status.temperature_min_dC) / 2);
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//Map values to CAN messages
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//Battery charge voltage (eg 400.0V = 4000 , 16bits long) (MIN 41V, MAX 63V, default 54V)
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SMA_351.data.u8[0] = ((datalayer.battery.info.max_design_voltage_dV - VOLTAGE_OFFSET_DV) >> 8);
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SMA_351.data.u8[1] = ((datalayer.battery.info.max_design_voltage_dV - VOLTAGE_OFFSET_DV) & 0x00FF);
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if (datalayer.battery.info.max_design_voltage_dV > MAX_VOLTAGE_DV) {
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//If the battery is designed for more than 63.0V, cap the value
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SMA_351.data.u8[0] = (MAX_VOLTAGE_DV >> 8);
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SMA_351.data.u8[1] = (MAX_VOLTAGE_DV & 0x00FF);
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//TODO; raise event?
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}
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//Discharge limited current, 500 = 50A, (0.1, A) (MIN 0, MAX 1200)
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SMA_351.data.u8[2] = (datalayer.battery.status.max_discharge_current_dA >> 8);
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SMA_351.data.u8[3] = (datalayer.battery.status.max_discharge_current_dA & 0x00FF);
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//Charge limited current, 125 =12.5A (0.1, A) (MIN 0, MAX 1200)
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SMA_351.data.u8[4] = (datalayer.battery.status.max_charge_current_dA >> 8);
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SMA_351.data.u8[5] = (datalayer.battery.status.max_charge_current_dA & 0x00FF);
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//Discharge voltage (eg 300.0V = 3000 , 16bits long) (MIN 41V, MAX 48V, default 41V)
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SMA_351.data.u8[6] = ((datalayer.battery.info.min_design_voltage_dV + VOLTAGE_OFFSET_DV) >> 8);
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SMA_351.data.u8[7] = ((datalayer.battery.info.min_design_voltage_dV + VOLTAGE_OFFSET_DV) & 0x00FF);
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if (datalayer.battery.info.min_design_voltage_dV < MIN_VOLTAGE_DV) {
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//If the battery is designed for discharge voltage below 41.0V, cap the value
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SMA_351.data.u8[6] = (MIN_VOLTAGE_DV >> 8);
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SMA_351.data.u8[7] = (MIN_VOLTAGE_DV & 0x00FF);
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//TODO; raise event?
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}
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//SOC (100%)
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SMA_355.data.u8[0] = ((datalayer.battery.status.reported_soc / 100) >> 8);
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SMA_355.data.u8[1] = ((datalayer.battery.status.reported_soc / 100) & 0x00FF);
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//StateOfHealth (100%)
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SMA_355.data.u8[2] = ((datalayer.battery.status.soh_pptt / 100) >> 8);
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SMA_355.data.u8[3] = ((datalayer.battery.status.soh_pptt / 100) & 0x00FF);
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//State of charge High Precision (100.00%)
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SMA_355.data.u8[4] = (datalayer.battery.status.reported_soc >> 8);
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SMA_355.data.u8[5] = (datalayer.battery.status.reported_soc & 0x00FF);
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//Voltage (370.0)
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SMA_356.data.u8[0] = ((datalayer.battery.status.voltage_dV * 10) >> 8);
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SMA_356.data.u8[1] = ((datalayer.battery.status.voltage_dV * 10) & 0x00FF);
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//Current (S16 dA)
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SMA_356.data.u8[2] = (datalayer.battery.status.current_dA >> 8);
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SMA_356.data.u8[3] = (datalayer.battery.status.current_dA & 0x00FF);
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//Temperature (s16 degC)
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SMA_356.data.u8[4] = (temperature_average >> 8);
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SMA_356.data.u8[5] = (temperature_average & 0x00FF);
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//TODO: Map error/warnings in 0x35A
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}
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void receive_can_inverter(CAN_frame rx_frame) {
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switch (rx_frame.ID) {
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case 0x305:
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datalayer.system.status.CAN_inverter_still_alive = CAN_STILL_ALIVE;
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//Frame0-1 Battery Voltage
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//Frame2-3 Battery Current
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//Frame4-5 Battery Temperature
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//Frame6-7 SOC Battery
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break;
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case 0x306:
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datalayer.system.status.CAN_inverter_still_alive = CAN_STILL_ALIVE;
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//Frame0-1 SOH Battery
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//Frame2 Charging procedure
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//Frame3 Operating state
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//Frame4-5 Active error message
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//Frame6-7 Battery charge voltage setpoint
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break;
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default:
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break;
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}
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}
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void send_can_inverter() {
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unsigned long currentMillis = millis();
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if (currentMillis - previousMillis100ms >= INTERVAL_100_MS) {
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previousMillis100ms = currentMillis;
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transmit_can(&SMA_351, can_config.inverter);
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transmit_can(&SMA_355, can_config.inverter);
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transmit_can(&SMA_356, can_config.inverter);
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transmit_can(&SMA_35A, can_config.inverter);
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transmit_can(&SMA_35B, can_config.inverter);
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transmit_can(&SMA_35E, can_config.inverter);
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transmit_can(&SMA_35F, can_config.inverter);
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//Remote quick stop (optional)
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if (datalayer.battery.status.bms_status == FAULT) {
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transmit_can(&SMA_00F, can_config.inverter);
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//After receiving this message, Sunny Island will immediately go into standby.
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//Please send start command, to start again. Manual start is also possible.
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}
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}
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}
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void setup_inverter(void) { // Performs one time setup at startup over CAN bus
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strncpy(datalayer.system.info.inverter_protocol, "SMA Low Voltage (48V) protocol via CAN", 63);
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datalayer.system.info.inverter_protocol[63] = '\0';
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}
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#endif
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13
Software/src/inverter/SMA-LV-CAN.h
Normal file
13
Software/src/inverter/SMA-LV-CAN.h
Normal file
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#ifndef SMA_LV_CAN_H
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#define SMA_LV_CAN_H
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#include "../include.h"
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#define CAN_INVERTER_SELECTED
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#define READY_STATE 0x03
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#define STOP_STATE 0x02
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void transmit_can(CAN_frame* tx_frame, int interface);
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void setup_inverter(void);
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#endif
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