This article describes the limitation of the Anybus Communicator.
The web site states that the sub-network can "multi-drop to up to 31 nodes". But the Anybus Configuration Manager limits this to 100 “transactions”. Is this a limitation?
Normally a Modbus command requires two “transactions”. If you have many different Modbus commands to each slave, you might reach the limit of 100 transactions on fewer slaves than 31.