With the Modbus protocol interface, SMA makes the flexible integration of inverters possible. The benefits are obvious. Through the use of this well-known, public industry standard, other providers can integrate SMA devices into their systems without having to follow the SMA-specific inverter protocol. System data is transferred via this standardized protocol for further processing and can, as such, be flexibly integrated into any system regardless of the manufacturer. The importance for system planning: You can use SMA inverters in your preferred standard system at any time without having to take manufacturer specifics into account. Direct inverter integration into control room systems or the connection of inverters in building automation systems are both ideal applications.
On the SMA product page “Modbus Protocol Interface” you find an overview of Modbus, FAQs and downlods.
The following questions / topics will be answer on the SMA product page:
SMA Modbus: General Information
- Reaction time
- Number of MPP trackers
- Modbus crashes after a few days
- Errors with certain registers at night
- Values are invalid
- Connection problems with a high number of faulty responses
- Modbus provides two answers upon request
- The inverter only provides the response with error code 11 via Modbus
SMA Modbus: Registers
- 30797 – grid current of line conductor
- 30799 – grid current of line conductor
- 30801 – grid current of line conductor
- 40016 – Maximum change limit value
- 40016 – Active power set point default setting
- 40155 – MAC address
- 40497 – MAC address
SMA SunSpec Modbus: General Information
- Cyclical system control
SMA SunSpec Modbus: Registers
- 40186 – model ID (ID)
- 40217 – DC power (DCW), in W*10
- 40219 – internal temperature (TmpCab), in °C
- 40224 – operating status (St)
- 40353 – choking (WMaxLim-Ena)
- 40358 – fixed power factor (OutPFSet_Ena)
- 40366 – control of reactive power limitation percentage (VArPct_Ena)
- 40632 – ID of MPP tracker (ID): 1
- 40641 – DC input 1 (DCA), in A*10
- 40642 – DC voltage input 1 (DCV), in V*10
- 40643 – DC power input 1 (DCW), in W*10
- 40652 – ID of MPP tracker (ID): 2
- 40661 – DC input 2 (DCA), in A*10
- 40662 – DC voltage input 2 (DCV), in V*10
- 40663 – DC power input 2 (DCW), in W*10