--- title: Realtime energy data [Modbus TCP Server] slug: dev/realtime-energy-data-modbus-tcp-server createdAt: 2024-04-16T12:34:12.086Z --- :::hint{type="info"} To activate the modbus TCP port, please contact support\@clemap.com To activate the write registers also note to the clemap engineer. (The cascading module needs to be activated). ::: :::hint{type="danger"} Note that Modbus and RestAPI overwrite each other. ::: :::hint{type="warning"} All registers are **holding registers**. **Modbus port:** 5020 **Ip Address:** \ ::: **Read registers:** | Register | Type | Name | Unit | | -------- | --------- | ----------------------- | ---- | | 19000 | float f32 | Voltage L1-N | V | | 19002 | float f32 | Voltage L2-N | V | | 19004 | float f32 | Voltage L3-N | V | | 19012 | float f32 | Current I L1 | A | | 19014 | float f32 | Current I L2 | A | | 19016 | float f32 | Current I L3 | A | | 19018 | float f32 | Vector sum; IN=I1+I2+I3 | A | | 19020 | float f32 | Real power P L1 | W | | 19022 | float f32 | Real power P L2 | W | | 19024 | float f32 | Real power P L3 | W | | 19026 | float f32 | Sum; Psum3=P1+P2+P3 | W | | 19028 | float f32 | Apparent power S L1 | VA | | 19030 | float f32 | Apparent power S L2 | VA | | 19032 | float f32 | Apparent power S L3 | VA | | 19034 | float f32 | Sum; Ssum3=S1+S2+S3 | VA | | 19036 | float f32 | reactive power Q L1 | var | | 19038 | float f32 | reactive power Q L2 | var | | 19040 | float f32 | reactive power Q L3 | var | | 19042 | float f32 | Sum; Qsum3=Q1+Q2+Q3 | var | **Write Registers** :::hint{type="danger"} Take in consideration that each register has to be written individually. For example when you write FallbackCurrentLimit, you write directly on 19052. Block writes are not supported yet. ::: | Register | Type | Name | Unit | | -------- | --------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------ | | 19050 | float f32 | **ActivePowerActivation**
Enable or disable LM controll over modbus or API:
Activates Registers 19052 and 19054 and KeepAlive timer. | bool \[0, 1] | | 19052 | float f32 | **FallbackCurrentLimit**
Limit set if keep no endpoint is not called in 120 sec (default).
The default limit is min\_current\_limit set on the config of the resource of the device. | A | | 19054 | float f32 | **Current Limit**
Load management current limit | A | | 19056 | float f32 | **Keep Alive**: cab be used write every 120s, else CurrentLimit falls into FallbackCurrentLimit values.
Please note that writing any of the other Write Register, will also do the trick.
If you want to change the default 120s, it can be overwritten in the config. Please contact support\@clemap.com for this:
FLEX\_CONTROL\_MESSAGE\_TIMEOUT | int |