Arduino, Modbus and Xbee

Good morning,

I am new in the subject and I´d like to know if it is possible to build a plataform with shields Modbus and Xbee in an Arduino Board.

The idea is to use the protocol Modbus from a generator, specifically PCC 1301, and send data through a Zigbee network to a PC.

There some equipments from Digi builds a Zigbee network and interprets the Modbus, creating a table of association.

I´d like to build a plataform using Arduino that mixes both of them: Modbus (RS485 =and Xbee)
Thanks