Write SMA Modbus Register

General
1

Hi, after a successful Modbus query (read) I wanted to venture into the next chapter, to write Modbus.. but I need some help:

Modbus register 40016 defines Power value of inverter in W to provide (set-point):
positive discharge, negative charge
40016 Power Value for Charge (-) or Discharge (+)

Activate has to be send before sending ‘Power Value for Charge (-) or Discharge (+)’
40151 "Activate Power Setpoint 802 active/ 803 inactive

With register 41187 could be select the mapping of power measurement to Devcie or Metering
(3053: MsSrcMtr -> use Meter data; 3547: MsSrcDev -> use inverter data).
And which meaning the ‘Power Value for Charge (-) or Discharge (+)’ has!!

this is from SMA

SBS Schreib Register2
SBS Schreib Register22163×662 268 KB

SBS Schreib Register
SBS Schreib Register1331×401 65.2 KB

this is from a guy who uses Siemes SPS.

and this is my first step:

[{"id":"95b6b7ed.d22d38","type":"modbus-write","z":"9f6752b0.b55988","name":"40151","showStatusActivities":true,"showErrors":true,"unitid":"3","dataType":"HoldingRegister","adr":"40151","quantity":"1","server":"b6c6500c.41cc1","emptyMsgOnFail":false,"keepMsgProperties":false,"x":790,"y":4320,"wires":[[],[]]},{"id":"d3f2c1e.3905f4","type":"ui_dropdown","z":"9f6752b0.b55988","name":"SBS manuelle Steuerung","label":"SBS manuell","tooltip":"","place":"Select option","group":"cafe7086.9845e8","order":13,"width":0,"height":0,"passthru":false,"multiple":false,"options":[{"label":"aktiv","value":802,"type":"num"},{"label":"aus","value":803,"type":"num"}],"payload":"","topic":"topic","topicType":"msg","x":270,"y":4320,"wires":[["d8369c1c.1bf58"]]},{"id":"86b1def.36c442","type":"debug","z":"9f6752b0.b55988","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":810,"y":4380,"wires":[]},{"id":"d8369c1c.1bf58","type":"buffer-maker","z":"9f6752b0.b55988","name":"","specification":"spec","specificationType":"ui","items":[{"name":"item1","type":"uint32be","length":1,"dataType":"msg","data":"payload"}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","x":510,"y":4320,"wires":[["86b1def.36c442","95b6b7ed.d22d38"]]},{"id":"b6c6500c.41cc1","type":"modbus-client","name":"SBS2.5","clienttype":"tcp","bufferCommands":true,"stateLogEnabled":false,"queueLogEnabled":false,"tcpHost":"192.168.168.55","tcpPort":"502","tcpType":"TPC-RTU-BUFFERED","serialPort":"/dev/ttyUSB","serialType":"RTU-BUFFERD","serialBaudrate":"9600","serialDatabits":"8","serialStopbits":"1","serialParity":"none","serialConnectionDelay":"100","unit_id":3,"commandDelay":200,"clientTimeout":1000,"reconnectOnTimeout":true,"reconnectTimeout":2000,"parallelUnitIdsAllowed":true},{"id":"cafe7086.9845e8","type":"ui_group","name":"manuelle Steuerung","tab":"69ee5cda.ec1a2c","order":3,"disp":true,"width":"6","collapse":false},{"id":"69ee5cda.ec1a2c","type":"ui_tab","name":"Speicher","icon":"fa-battery-half","order":4,"disabled":false,"hidden":false}]

which is unsuccessful :roll_eyes:
(I just wanted to switch the inverter in manuell mode)

grafik
this comes out of the buffer maker to write modbus

grafik
grafik2560×217 11.4 KB

here some information from SMA:
SMA-Modbus-general-TI-en-10.pdf (286.3 KB)

2

I think I circled the problem:

grafik
grafik324×650 14.8 KB

green: output of a modbus read uint32-be

I think I have to write such an array to two registers, but I don´t know how to create an array, and write array 0 to register 40151 and array 1 to register 40152.

Maybe @Steve-Mcl has an idea.

3

so what is it you need to achieve (in words).

e.g...

  • Set register 40151 to UINT32 value 803
  • then set 40016 to UINT32 a value entered in dashboard

PS for UINT32 values, you will probably need to send 2 16bit values to 2 registers starting at the address specified in the docs.
e.g. for setting a value of 803 to register 40151 you will probably need to use modbus function FC:16 and quantity of 2 then send 2 UINT16 values in an array. To achieve that, you can use buffer-maker and buffer-parser together like this...

cWnC5C8tPd
cWnC5C8tPd791×142 24.2 KB 

[{"id":"eb22adaf.f8d3b","type":"buffer-parser","z":"4b3f21a3.ba434","name":"","data":"payload","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"uint16be","name":"data","offset":0,"length":2,"offsetbit":0,"scale":"1","mask":""}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","resultType":"value","resultTypeType":"output","multipleResult":true,"fanOutMultipleResult":false,"setTopic":true,"outputs":1,"x":1140,"y":1540,"wires":[["f9e12d3.4d4c4d"]]},{"id":"25af7742.696c78","type":"buffer-maker","z":"4b3f21a3.ba434","name":"","specification":"spec","specificationType":"ui","items":[{"name":"item1","type":"uint32be","length":1,"dataType":"msg","data":"payload"}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","x":950,"y":1540,"wires":[["eb22adaf.f8d3b"]]},{"id":"f9e12d3.4d4c4d","type":"debug","z":"4b3f21a3.ba434","name":"","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"payload","targetType":"msg","statusVal":"payload","statusType":"auto","x":1330,"y":1540,"wires":[]},{"id":"3514a83f.169cb8","type":"inject","z":"4b3f21a3.ba434","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"803","payloadType":"num","x":790,"y":1540,"wires":[["25af7742.696c78"]]},{"id":"53955222.0657cc","type":"inject","z":"4b3f21a3.ba434","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"9999999","payloadType":"num","x":780,"y":1580,"wires":[["25af7742.696c78"]]},{"id":"6edb51fe.0b9d1","type":"inject","z":"4b3f21a3.ba434","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"4294967295","payloadType":"num","x":770,"y":1620,"wires":[["25af7742.696c78"]]}]
1 Like
4

yeah it works:

[{"id":"95b6b7ed.d22d38","type":"modbus-write","z":"9f6752b0.b55988","name":"40149","showStatusActivities":true,"showErrors":true,"unitid":"3","dataType":"MHoldingRegisters","adr":"40149","quantity":"2","server":"b6c6500c.41cc1","emptyMsgOnFail":false,"keepMsgProperties":false,"x":970,"y":4400,"wires":[[],[]]},{"id":"d3f2c1e.3905f4","type":"ui_dropdown","z":"9f6752b0.b55988","name":"SBS manuelle Steuerung","label":"manuelle Steuerung","tooltip":"","place":"Select option","group":"cafe7086.9845e8","order":13,"width":0,"height":0,"passthru":false,"multiple":false,"options":[{"label":"aktiv","value":802,"type":"num"},{"label":"aus","value":803,"type":"num"}],"payload":"","topic":"topic","topicType":"msg","x":210,"y":4500,"wires":[["7bbfa576.6245fc"]]},{"id":"eb22adaf.f8d3b","type":"buffer-parser","z":"9f6752b0.b55988","name":"","data":"payload","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"uint16be","name":"data","offset":0,"length":2,"offsetbit":0,"scale":"1","mask":""}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","resultType":"value","resultTypeType":"output","multipleResult":true,"fanOutMultipleResult":false,"setTopic":true,"outputs":1,"x":710,"y":4400,"wires":[["f9e12d3.4d4c4d","95b6b7ed.d22d38"]]},{"id":"25af7742.696c78","type":"buffer-maker","z":"9f6752b0.b55988","name":"","specification":"spec","specificationType":"ui","items":[{"name":"item1","type":"int32be","length":1,"dataType":"msg","data":"payload"}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","x":520,"y":4400,"wires":[["eb22adaf.f8d3b"]]},{"id":"f9e12d3.4d4c4d","type":"debug","z":"9f6752b0.b55988","name":"","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"payload","targetType":"msg","statusVal":"payload","statusType":"auto","x":990,"y":4460,"wires":[]},{"id":"3514a83f.169cb8","type":"inject","z":"9f6752b0.b55988","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"400","payloadType":"num","x":360,"y":4400,"wires":[["25af7742.696c78"]]},{"id":"98173ae5.5c8d68","type":"modbus-write","z":"9f6752b0.b55988","name":"40151","showStatusActivities":true,"showErrors":true,"unitid":"3","dataType":"MHoldingRegisters","adr":"40151","quantity":"2","server":"b6c6500c.41cc1","emptyMsgOnFail":false,"keepMsgProperties":false,"x":970,"y":4600,"wires":[[],[]]},{"id":"975bdcc1.ee8b68","type":"buffer-parser","z":"9f6752b0.b55988","name":"","data":"payload","dataType":"msg","specification":"spec","specificationType":"ui","items":[{"type":"uint16be","name":"data","offset":0,"length":2,"offsetbit":0,"scale":"1","mask":""}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","resultType":"value","resultTypeType":"output","multipleResult":true,"fanOutMultipleResult":false,"setTopic":true,"outputs":1,"x":710,"y":4600,"wires":[["856b9961.52575","98173ae5.5c8d68"]]},{"id":"7bbfa576.6245fc","type":"buffer-maker","z":"9f6752b0.b55988","name":"","specification":"spec","specificationType":"ui","items":[{"name":"item1","type":"uint32be","length":1,"dataType":"msg","data":"payload"}],"swap1":"","swap2":"","swap3":"","swap1Type":"swap","swap2Type":"swap","swap3Type":"swap","msgProperty":"payload","msgPropertyType":"str","x":520,"y":4600,"wires":[["975bdcc1.ee8b68"]]},{"id":"856b9961.52575","type":"debug","z":"9f6752b0.b55988","name":"","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"payload","targetType":"msg","statusVal":"payload","statusType":"auto","x":990,"y":4660,"wires":[]},{"id":"51df5a94.a9cb94","type":"inject","z":"9f6752b0.b55988","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"803","payloadType":"num","x":350,"y":4600,"wires":[["7bbfa576.6245fc"]]},{"id":"7cf8dcb7.d2c40c","type":"inject","z":"9f6752b0.b55988","name":"aktiv","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"802","payloadType":"num","x":350,"y":4660,"wires":[["7bbfa576.6245fc"]]},{"id":"dc0b5ef5.915538","type":"ui_text_input","z":"9f6752b0.b55988","name":"Leistung","label":"Leistung","tooltip":"(- Laden / + Entladen)","group":"cafe7086.9845e8","order":1,"width":0,"height":0,"passthru":false,"mode":"text","delay":300,"topic":"topic","topicType":"msg","x":300,"y":4320,"wires":[["25af7742.696c78"]]},{"id":"b6c6500c.41cc1","type":"modbus-client","name":"SBS2.5","clienttype":"tcp","bufferCommands":true,"stateLogEnabled":false,"queueLogEnabled":false,"tcpHost":"192.168.168.55","tcpPort":"502","tcpType":"TPC-RTU-BUFFERED","serialPort":"/dev/ttyUSB","serialType":"RTU-BUFFERD","serialBaudrate":"9600","serialDatabits":"8","serialStopbits":"1","serialParity":"none","serialConnectionDelay":"100","unit_id":3,"commandDelay":200,"clientTimeout":1000,"reconnectOnTimeout":true,"reconnectTimeout":2000,"parallelUnitIdsAllowed":true},{"id":"cafe7086.9845e8","type":"ui_group","name":"manuelle Steuerung","tab":"69ee5cda.ec1a2c","order":3,"disp":true,"width":"6","collapse":false},{"id":"69ee5cda.ec1a2c","type":"ui_tab","name":"Speicher","icon":"fa-battery-half","order":4,"disabled":false,"hidden":false}]

but after a few seconds, the inverter falls back to automatic mode, do I have to write it periodically ?

Do you have an idea how to implement ?

5

No, sorry, I dont know anything about your particular invertor.

6

Do you know how to write the values I set in the dashboard periodically (every 5s) into modbus ?

7

Why would you want to?

Cant you just write the 803 value before sending the updated value?

If you must though, store the dashboard value in context (flow.something or global something) then use an inject node to grab the context value and write it to modbus.

8

because it has to be by the inverter every 15s (somebody told me).

can you please explain what I have to do:

If you must though, store the dashboard value in context (flow.something or global something) then use an inject node to grab the context value and write it to modbus.

grafik
grafik1171×309 17.1 KB

so I only get the timestamp into the field :weary:

9

You didnt store the dashboard value in context.

e.g...

image
image1050×205 14.8 KB

10

It doesn´t work, can you please give me the flow ? never worked with flow.xxx

11

I dont have a flow for you. I just knocked that up for the screenshot.

It is not difficult.

DASHBOARD INPUT → CHANGE NODE (set flow.xxxx to msg.payload)
image

INJECT (set msg.payload to flow.xxxx) → buffer → buffer → modbus
image

You can check in the context viewer to see if the value is present...
image

1 Like
12

thank you, I reversed the flow with msg :grimacing:

13

I need a little help again :nerd_face:

I have now built all the write registers, but now I have to have them written one after the other, all at once overwhelmed the Modbus server.
Similar to how you built it for me with the reading registers (see red marking) - but I don't know how.

grafik
grafik1643×1121 137 KB

edit, i think i got it:

grafik
grafik1124×443 49.3 KB

just with set

1 Like
14

one last question @Steve-Mcl :wink:

sa
sa893×395 87.2 KB

is this correct ?
the parser always uint16be ? i´m not sure

15

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