`<CHANNEL_NUMBER>` is in the range 1 to 4 depending on the inverter type
@ -47,7 +47,8 @@ The ahoy dtu will publish on the following topics
|YieldTotal | 110.819 | Energy converted to AC since reset Watt hours per module/channel (measured on DC) |
|Irradiation |5.65 | ratio DC Power over set maximum power per module/channel in percent |
## Active Power Limit via Setup Page
## Active Power Limit via Serial / Control Page
URL: `/serial`
If you leave the field "Active Power Limit" empty during the setup and reboot the ahoy-dtu will set a value of 65535 in the setup.
That is the value you have to fill in case you want to operate the inverter without a active power limit.
If the value is 65535 or -1 after another reboot the value will be set automatically to "100" and in the drop-down menu "relative in percent persistent" will be set. Of course you can do this also by your self.
@ -68,160 +69,182 @@ after a power cycle of the inverter (P_DC=0 and P_AC=0 for at least 10 seconds)
The user has to ensure correct settings. Remember that for the inverters of 3rd generation the relative active power limit is in the range of 2% up to 100%.
Also an absolute active power limit below approx. 30 Watt seems to be not meanful because of the control capabilities and reactive power load.
## Active Power Limit via MQTT
The ahoy-dtu subscribes on the topic `<CHOOSEN_TOPIC_FROM_SETUP>/devcontrol/#` if the mqtt broker is set-up correctly. The default topic is `inverter/devcontrol/#`.
## Control via MQTT
To set the active power limit (controled value is the AC Power of the inverter) you have four options. (Only single phase inverters are actually in focus).
### Generic Information
| topic | payload | active power limit in | Condition |
The implementation allows to set any of the available `<DevControlCmdType>` Commands:
```C
typedef enum {
TurnOn = 0, // 0x00
TurnOff = 1, // 0x01
Restart = 2, // 0x02
Lock = 3, // 0x03
Unlock = 4, // 0x04
ActivePowerContr = 11, // 0x0b
ReactivePowerContr = 12, // 0x0c
PFSet = 13, // 0x0d
CleanState_LockAndAlarm = 20, // 0x14
SelfInspection = 40, // 0x28, self-inspection of grid-connected protection files
Init = 0xff
} DevControlCmdType;
### Inverter Power (On / Off)
```mqtt
<TOPIC>/ctrl/power/<INVERTER_ID>
```
The MQTT payload will be set on first to bytes and `<DATA2>`, which is taken from the topic path will be set on the second two bytes if the corresponding DevControlCmdType supports 4 byte data.
See here the actual implementation to set the send buffer bytes.
Example to set the active power limit non persistent to 10%
```json
{
"inverter":0,
"tx_request": 81,
"cmd": 11,
"payload": 10,
"payload2": 1
"id": <INVERTER_ID>,
"cmd": "restart"
}
```
Example to set the active power limit persistent to 600Watt
### Power Limit relative persistent [%]
```json
{
"inverter":0,
"tx_request": 81,
"cmd": 11,
"payload": 600,
"payload2": 256
"id": <INVERTER_ID>,
"cmd": "limit_persistent_relative",
"val": <VALUE>
}
```
The `VALUE` represents a percent number in a range of `[2 .. 100]`
### Power Limit absolute persistent [Watts]
### Developer Information REST API
In the same approach as for MQTT any other SubCmd and also MainCmd can be applied and the response payload can be observed in the serial logs. Eg. request the Alarm-Data from the Alarm-Index 5 from inverter 0 will look like this:
```json
{
"inverter":0,
"tx_request": 21,
"cmd": 17,
"payload": 5,
"payload2": 0
"id": <INVERTER_ID>,
"cmd": "limit_persistent_absolute",
"val": <VALUE>
}
```
The `VALUE` represents watts in a range of `[0 .. 65535]`
## Zero Export Control
* You can use the mqtt topic `<CHOOSEN_TOPIC_FROM_SETUP>/devcontrol/<INVERTER_ID>/11` with a number as payload (eg. 300 -> 300 Watt) to set the power limit to the published number in Watt. (In regular cases the inverter will use the new set point within one intervall period; to verify this see next bullet)
* You can check the inverter set point for the power limit control on the topic `<CHOOSEN_TOPIC_FROM_SETUP>/<INVERTER_NAME_FROM_SETUP>/ch0/PowerLimit` 👆 This value is ALWAYS in percent of the maximum power limit of the inverter. In regular cases this value will be updated within approx. 15 seconds. (depends on request intervall)
* You can monitor the actual AC power by subscribing to the topic `<CHOOSEN_TOPIC_FROM_SETUP>/<INVERTER_NAME_FROM_SETUP>/ch0/P_AC` 👆 This value is ALWAYS in Watt
## Issues and Debuging for active power limit settings
### Power Limit relative non persistent [%]
Turn on the serial debugging in the setup. Try to have find out if the behavior is deterministic. That means can you reproduce the behavior. Be patient and wait on inverter reactions at least some minutes and beware that the DC-Power is sufficient.
```json
{
"id": <INVERTER_ID>,
"cmd": "limit_nonpersistent_relative",
"val": <VALUE>
}
```
The `VALUE` represents a percent number in a range of `[2 .. 100]`
In case of issues please report:
1. Version of firmware
2. The output of the serial debug esp. the TX messages starting with "0x51" and the RX messages starting with "0xD1" or "0xF1"
3. Which case you have tried: Setup-Page, MQTT, REST API and at what was shown on the "Visualization Page" at the Location "Limit"
4. The setting means payload, relative, absolute, persistent, not persistent (see tables above)
### Power Limit absolute non persistent [Watts]
```json
{
"id": <INVERTER_ID>,
"cmd": "limit_nonpersistent_absolute",
"val": <VALUE>
}
```
The `VALUE` represents watts in a range of `[0 .. 65535]`
**Developer Information General for Active Power Limit**
⚡The following was verified by field tests and feedback from users
Internally this values will be set for the second two bytes for MainCmd: 0x51 SubCmd: 0x0b --> DevControl set ActivePowerLimit
```C
typedef enum {
AbsolutNonPersistent = 0x0000, // 0
RelativNonPersistent = 0x0001, // 1
AbsolutPersistent = 0x0100, // 256
RelativPersistent = 0x0101 // 257
} PowerLimitControlType;
### Developer Information REST API (obsolete)
In the same approach as for MQTT any other SubCmd and also MainCmd can be applied and the response payload can be observed in the serial logs. Eg. request the Alarm-Data from the Alarm-Index 5 from inverter 0 will look like this:
```json
{
"inverter":0,
"tx_request": 21,
"cmd": 17,
"payload": 5,
"payload2": 0
}
```
## Zero Export Control (needs rework)
* You can use the mqtt topic `<TOPIC>/devcontrol/<INVERTER_ID>/11` with a number as payload (eg. 300 -> 300 Watt) to set the power limit to the published number in Watt. (In regular cases the inverter will use the new set point within one intervall period; to verify this see next bullet)
* You can check the inverter set point for the power limit control on the topic `<TOPIC>/<INVERTER_NAME_FROM_SETUP>/ch0/PowerLimit` 👆 This value is ALWAYS in percent of the maximum power limit of the inverter. In regular cases this value will be updated within approx. 15 seconds. (depends on request intervall)
* You can monitor the actual AC power by subscribing to the topic `<TOPIC>/<INVERTER_NAME_FROM_SETUP>/ch0/P_AC` 👆 This value is ALWAYS in Watt
## Firmware Version collection
Gather user inverter information here to understand what differs between some inverters.
To get the information open the URL `/api/record/info` on your AhoyDTU. The information will only be present once the AhoyDTU was able to communicate with an inverter.
| Name | Inverter Typ | Bootloader V. | FWVersion | FWBuild [YYYY] | FWBuild [MM-DD] | HWPartId | | |
iv->powerLimit[0]=std::stoi(std::string((char*)payload,(unsignedint)length));// THX to @silversurfer
/*if (iv->powerLimit[1] & 0x0001)
DPRINTLN(DBG_INFO,F("Power limit for inverter ")+String(iv->id)+F(" set to ")+String(iv->powerLimit[0])+F("%"));
else
DPRINTLN(DBG_INFO,F("Power limit for inverter ")+String(iv->id)+F(" set to ")+String(iv->powerLimit[0])+F("W"));*/
DPRINTLN(DBG_INFO,F("Power limit for inverter ")+String(iv->id)+F(" set to ")+String(iv->powerLimit[0])+String(iv->powerLimit[1]&0x0001)?F("%"):F("W"));
Make sure that you have noted all your settings before starting an update. New versions may have changed their memory layout which can break your existing settings.<br/>
<br/>
<ahref="/get_setup"target="_blank">Download your settings (JSON file)</a>
DanielR92
2 years ago
GitHub