Device Addressing

In this addressing mode a single slave is addressed with the associated PDU. This addressing mode is usually used for transferring parameters.

There are two sorts of device addressing: position addressing and node addressing.

Position Addressing

With this mode, the slaves are identified using their position in the communication network. Normally position addressing is used during start-up. After communication with the slaves is established, the master can give the slave a new node ID according to the projected value.

Node Addressing

After receiving the node ID from the master, the slaves can be addressed by using the node addressing mode.

This ensures that, even if the segment topology is changed or devices are added or removed, the slave devices can still be addressed via the same configured address.