Requirements

To get the most of out WattMaestro, a couple of settings are required.

Modbus Attributes

The following attributes need to be known:

• Register Address

• Input/Holding

• Modbus Datatype

  • Signed/Unsigned

  • Number of bit (8, 16, 32, 64, etc..)

• Readable/Writeable

• Unit

• Word Order (Big/Little Endian)

• Byte Order (Big/Little Endian)

Energy Meter

Asset

Connecting an Energy Meter is mandatory

Registers

Register	Read/Write	Level of Requirement
Power Consumption	Read	Mandatory
Power Production	Read	Mandatory
Energy Consumption	Read	Mandatory
Energy Production	Read	Mandatory
Voltage	Read	Optional
Current	Read	Optional
Frequency	Read	Optional

Inverter

Asset

Connecting an Inverter is optional

Registers

Register	Read/Write	Level of Requirement
E-Daily	Read	Optional
E-Total	Read	Optional
Reactive Power	Read	Optional
Active Power	Read	Mandatory
Active Power adjustment by percentage	Read/Write	Mandatory*
Active Power adjustment (kW)	Read/Write	Mandatory*

*At least one of the 2 register is mandatory

Battery

Asset

Connecting a Battery is optional

Registers

Register	Read/Write	Level of Requirement
State of Charge (SOC)	Read	Mandatory
Setting SOC	Read/Write	Mandatory
Battery Control Function	Read/Write	Mandatory