Yaskawa Modbus TCP/IP SI-EM3D/V - Manual (Page 46)

9 Rapid Spanning Tree Protocol
Rapid Spanning Tree Protocol (RSTP) is a mechanism that allows an Ethernet network to be
configured as a ring or other topology that may have more than one pathway to each node.
The RSTP protocol automatically determines the most efficient pathway to each node and
disables any redundant pathways.
Refer to the option Technical Manual for a full description of RSTP features and functions.
9 Rapid Spanning Tree Protocol
46 YASKAWA TOEP YAICOM 17A V1000 Option Dual-Port Modbus TCP/IP SI-EM3D/V Installation Manual