TOPCON MS1AXII / SOKKIA NET1200 MONMOS COMMUNICATION PROTOCOL

I'm trying to link my PC to a Topcon MS1AXII robotic to send a data request to receive its tracking data.

This is the same hardware as the Sokkia NET1200 Monmos system in my believe.

I've tried the TopconLink and Sokkia Prolink 1.15 communication software but this is to exchange data from internal memory and not for direct communication.

Does anyone here have an instruction manual / experience with a direct link to this Robotic ?

I want to communicate with it to send instructions when it is tracking a hydrographic vessel with prisms mounted. The data is then send to the vessel to combine with the sonar data.

Your replies are much appreciated.

Thanks for reading.

arjen