Yaskawa V1000-Series Option SI-EM3D/V Dual Port EtherNet Modbus TCP/IP Technical Manual - Manual (Page 42)

Figure 31 RSTP Page Initial View
Change the select box labeled “STP / RSTP” from “DISABLED” to “ENABLED” then click “Save Changes”. The webpage
will automatically refresh and enable RSTP. Refer to Figure 23 for an example of an RSTP enabled home page.
u Rapid Spanning Tree Protocol Webpage
There are two groups of data displayed on the RSTP webpage: General and Port Information.
n General
STP / RSTP Enable
To enable RSTP, Change this setting to “ENABLED” and click “Save Changes” to enable RSTP.
Priority
The RSTP Priority controls which bridge in the network becomes the root bridge. For most installations, the PLC or controller
should be configured as the root bridge. A lower value in the “Priority” field indicates a higher priority. The priority ranges
from 0 to 61440 in increments of 4096. The option defaults to the lowest priority, 61440. Table 37 lists the possible priorities.
Table 37 Priority Values
0 16384 32678 49152
4096 20480 36864 53248
8192 24576 40960 57344
12288 28672 45056 61440
To change the priority, select the desired priority from the list and click “Save Changes”.
Root Bridge
This field displays the MAC address of the root bridge on the network.
Hello Time (secs)
The Hello Time is displayed in seconds. This value is set by the root bridge and indicates how often bridge packets will be
sent out.
Forward Delay (secs)
The Forward Delay is displayed in seconds. This value is set by the root bridge. When the port is using STP and not RSTP,
the Forward Delay is the length of time the bridge will wait before transitioning between states.
9 Rapid Spanning Tree Protocol
42 YASKAWA SIEP YAICOM 17A V1000 Option Dual-Port Modbus TCP/IP SI-EM3D/V Technical Manual