Hello,
I´m trying to create my own ESS system with Multiplus 2 and own control software. I just want to tell the device that it should take or feed xxx Watt to/from grid.
Here is my setup:
Multiplus 2 3000W 48V
MK3-USB Interface
Simple serial pc tool in order to see the communication (HTERM)
I already read the documents:
ESS mode 2 and 3
Interfacing with VE.Bus products – MK2 Protocol
What I´ve done:
Set the grid to AN4105 – Internal NS
Installed the ESS assistent 017E
In general, I can communicate with the device. I can read DC Info, AC Info.
From the documents above, I think I have to find the RAM ID of the ESS assistant and then just write the set point. Here is what I get (without CRC):
Read RAM ID 128:
05 FF 57 30 80 00 → 07 FF 57 01 00 89 5C
means: Assistent 0000 with 1 RAM ID? (and ~230V AC)
Read RAM ID 130:
05 FF 57 30 82 00 → 07 FF 57 54 00 89 5C
means: Assistent 0005 with 4 RAM ID? Is this the ESS assistent? The manual says that it has only 2 RAM ID? Or do I have to look for the installed 017E assistent?
Read RAM ID 135:
05 FF 57 30 87 00 → 07 FF 57 A1 00 89 5C
I´ve checked also higher RAM ID, but they bring a 00 00.
When I try to set a RAM adress I get a 0x80 error:
Set RAM adress 128+1:
05 FF 57 32 81 00 → 04 FF 57 80 00
Set RAM adress 130+1:
05 FF 57 32 83 00 → 04 FF 57 80 00
write Data to RAM ID (setpoint 200W):
05 FF 57 34 C8 00 → 04 FF 57 80 00
Where is my mistake?
Thank you.
