System states
Monitoring of the system states
The easiest way to monitor and log the charging system process and states is by using the command line tool skycharge-cli.
| State | Description |
|---|---|
| STOPPED | All operations suspended. |
| SCANNING | The Source board starts in this state, cyclically scanning the load. When load is detected, the Source board enters the LINK_ESTABLISHED state. |
| LINK_ESTABLISHED | If the Source board 'detect-mode' is set to 'plc' (see Source board configuration), the Source board retrieves the Sink board charging configuration over the data link and verifies it. If the Source board 'detect-mode' is set to 'capacity' this state is intermediate. |
| PRECHARGING_DELAYED | This state indicates that charging is started, but the Sink board configuration setting 'precharge_delay_secs' is set to a value other than 0 and thus the pre-charging is delayed to this amount of seconds. |
| PRECHARGING | Pre-charging is started. During the pre-charging phase, the current slowly increases from the value of 'precharge_current_mA' to 'charging_max_current_mA' during the 'precharge_secs' number of seconds. |
| CHARGING | Charging is in progress. |
| CHARGING_FINISHED | The charging process is complete. See the "reason" status for clarification. |
| ERR_BAD_LINK | When a load is disconnected, the Source board is switched to this state. This error state is considered a normal ending phase of the charging session. |
| ERR_LOW_MUX_VOLTAGE | The Source board detects a low input voltage. |
| ERR_VOLTAGE_ON_OUTPUT | The Source board detects a voltage on the output contacts. EXPERIMENTAL |
| ERR_SHORT_CIRCUIT | Error state which indicates that short circuit was detected while scan procedure. |
There can be several reasons when charging is stopped and system goes to the CHARGING_FINISHED state:
| Reason | Description |
|---|---|
| REACHED_CURRENT_CUTOFF | Current cutoff is reached. See the 'cutoff-min-current-ma' sink configuration setting. |
| CHARGING_TIME_ELAPSED | Charging time elapsed. See the 'total-charge-secs' sink configuration setting. |
| CHARGING_FORCIBLY_STOPPED | Charging was stopped by the 'sink-stop-charge' command. See the command line tool documentation page. |
| CRITICAL_TEMP_ON_MUX | Critical temperature is reached on charge source (MUX). |
| CRITICAL_TEMP_ON_SINK | Critical temperature is reached on a charge sink (PLC mode only). |
| INVAL_CHARGING_SETTINGS | Error state which indicates that the charging configuration retrieved from a Sink board is invalid (PLC mode only). |
| LOW_BATT_VOLTAGE | The Source board detects a battery voltage that is below the 'batt_min_voltage_mV' value. See sink configuration settings. |
The system state is also displayed by a LED on the Source board. This is used for maintenance purposes only. The following states correspond to LED lights:
| State | Description |
|---|---|
| SCANNING | The system is scanning for the load. "SCN" LED (green) blinks fast. |
| PRECHARGING_DELAYED | The system delays pre-charging/charging, load is constantly detected. "CHG" LED (orange) blinks. "SCN" LED (green) is solid. |
| PRECHARGING CHARGING | The system is in the charge loop. "CHG" LED (orange) blinks fast. |
| CHARGING_FINISHED | The charging process is complete, load is constantly detected. "CHG" LED (orange) and "SCN" LED (green) blink fast simultaneously. |
| STOPPED | All operations are suspended. All three LEDs blink fast simultaneously. |
| ERR_LOW_MUX_VOLTAGE ERR_VOLTAGE_ON_OUTPUT | Global Source board error state. "ERR" LED (red) and "SCN" LED (green) blink slow alternately. |
| ERR_LOW_BATT_VOLTAGE ERR_INVAL_CHARGING_SETTINGS ERR_SHORT_CIRCUIT | Charging error state. "ERR" LED (red) blinks fast for the 'error_indication_timeout_secs' number of seconds (see the Source board settings). |
Updated over 2 years ago
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