Re: [Minimalmodbus-list] Morningstar SunSaver MPPT

[Jonas B. <jon...@ho...>]

Best Russel,
sorry for the late reply.

I was looking into the documentation for your battery charging
regulator:
http://support.morningstarcorp.com/wp-content/uploads/2014/07/SSMPPT.APP
_.Modbus.EN_.10.pdf

On page 5, it says Write Single Coil (0x05). The address for reset is
0x00F.

"Single Coil" is in practical terms a bit. So I guess you should use the
command:
write_bit(0xff, 1, functioncode=5)

See http://minimalmodbus.sourceforge.net/#implemented-functions

Please give it a try, and report back.

Best regards
Jonas


<-----Ursprungligt Meddelande----->

 	 	From: Russell Nelson [rus...@gm...]
Sent: 30/9/2014 3:34:06 PM
To: min...@li...
Subject: [Minimalmodbus-list] Morningstar SunSaver MPPT 

Hi. I'm trying to command the Morningstar SunSaver MPPT to reset. 
That's register 0xff, writing a 1. Trouble is that they only support 
using function 5 to do that, and write_register() rejects all but 6 
and 10. I got it to work by adding 5 to the list. I don't know if this 
is the right thing to do in general, but it works for me. Hope this is 
helpful. Like this: 



_checkFunctioncode(functioncode, [5, 6, 16]) 


and then like this: 
instrument.write_register(0xff,1, functioncode=5) 

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