Two WT meters as of 04.30.2018 have MODBUS:
WT1800E
WT300E
The following meters do not have MODBUS native:
WT500, WT3000, WT3000E, WT1800, PX8000, WT200
Other Solutions pertinent to power analysis by MODBUS TCP:
You can purchase and use a GM10 data system as a gateway device to other power analyzer equipment.
The GM10 has SCPI based protocols built-in so that it it can communicate to many of our WT series power analyzers (12 at any one time).
This gateway / GM10 can then then broadcast those parameters on ModbusTCP or Ethernet/IP (Rockwell) or SLMP (Mitsubishi).