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adragan avatar image
adragan asked

V.Direct to RS232 Interface physics

Dear sirs,

For connecting SolarSmart MPPT 75/15 I want to use VE. Direct the RS232 interface cable to Siemens communication module CM 1241, RS232. Siemens module has interface physics RS232C(V24).

Is the communication module MPPT 75 compatible with RS232C(V24)?


Best Regards,


Draga Aleksov

D4Tech


VE.Direct
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4 Answers
wkirby avatar image
wkirby answered ·

No, the MPPT is not directly compatible with RS232 signalling. It is 5V TTL.
You can convert the signals using a MAX232 or something similar.

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Gary Pacey avatar image
Gary Pacey answered ·

Victron sells a VE.Direct to RS-232 cable for this application.


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mvader (Victron Energy) avatar image
mvader (Victron Energy) answered ·
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adragan avatar image adragan commented ·

Hi,

Everything is clear. RS232 to TTL converter. But, I have a question about programming SmartSolar MPPT 75/15.

The question refers to VE. Direct protocol.

I want to use the following functions:


Load output control values (register 0xEDAB):

4 ON Load output on (use with caution, no discharge guard)

7 AES Automatic Energy Selector (*3)


Load output data/settings registers:

0xED9D Load switch high level (*2) 0.01 un16 V

0xED9C Load switch low level (*2) 0.01 un16 V


Lighting controller timer:

0xED90 AES Timer 1 un16 min


Usage Schedule:


1. From the midnight to 4:00 am: AES Timer = 300min, 7 AES Automatic Energy Selector (*3) = Active( Maximal power 18W)

2. From 4:00 am to 7:00 am: 4 ON Load output on (use with caution, no discharge guard) = Active. If I need action (Maximal power 55W) otherwise ( Maximal power 18W)

AES Timer = 300min

3. From 7:00 am to 8:00 am: AES Timer = 120min, 7 AES Automatic Energy Selector (*3) = Active( Maximal power 18W)

3. From 8:00 am to midnight: AES Timer = 1min, 7 AES Automatic Energy Selector (*3) = Active


It is possible?

Please, can you explain to me the next functions:

1. Load output control values (register 0xEDAB)

2. Load output data/settings registers

3. Lighting controller timer



Best regards,


Dragan Aleksov



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Pablo Rodriguez avatar image
Pablo Rodriguez answered ·

Hi guys, respect to topic, I have a question. I have a MPPT 75|15 and I would like to read and modify the option highlighted in image below using HEXA Protocol. What are the register ID's ? . I was searching in the HEXA Protocol document but I didnt found anything. Thanks in advance.


Best Regards.



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VE.Direct protocol FAQ