ABB ACS580 drive ➡ Elfin-EW11➡ Node Red

[kaimo123]

Hello, maybe someone can help me.
The goal is to get data and control ABB ACS580 drive (pressure sensor data, start/stop motor, seeing and removing errors). Middle man is Elfin-EW11. End point is Node Red and Home assistant.

The problem seems to be that ACS580 and EW-11 do not communicate with each other.

Made in home assistant forum similar post.

[Steve-Mcl]

Modbus cannot read 65535 addresses in one go. Limit the quantity to 100. (actually 123 words is the specification max quantity)

[kaimo123]

Yes, that's good to know.
But even if use quantity 1 I still got "Modbus Failure On State sending Get More About It By Logging" and "Error: Timed out"

[damica51]

I deal with modbus everyday and I have never seen a modbus address start at "0". Mine always start at "1". But I don't know anything about your hardware so I could be incorrect. Maybe try reading another table. Also keep in mind some Modbus will require an "Offset of +1"

Here is a list of function codes.
Most used Function Codes

• 01: Coils (FC=01)
• 02: Discrete Inputs (FC=02)
• 03: Multiple Holding Registers (FC=03)
• 04: Input Registers (FC=04)
• 05: Single Coil (FC=05)
• 06: Single Holding Register (FC=06)
• 0F: Multiple Coils (FC=15)
• 10: Multiple Holding Registers (FC=16)