S&C Instruction Sheet 461-509 75
Conguring the Communications Gateway
STEP 5. If a SpeedNet™ Radio is used for the eld area network radio, the remote Web
user’s computer will require an additional setting to be updated to enable Web
access. The user must reduce the MTU (maximum transmission unit) size to a
value of 500 or lower. S&C recommends using an MTU size of 500 for
optimal performance. To change the MTU size, the following command can be
used on a Windows 10 machine: netsh interface ipv4 set sub-interface “Local
Area Connection” mtu=500 store=persistent.
STEP 6. From the DNP3 Master/SCADA Master, send the following command to the
status point congured in Step 3 on page 74:
• Direct Relay control command
(a) Type = Latching Relay
(b) Value = Latch On (To Enable)
STEP 7. Check the Binary Input status points that align with the status points
congured in Step 4 on page 74.
• 8: Communication Gateway remote web user interface access enabled status
point reects “1”/“True” value
• 9: Communication Gateway remote web user interface access enabled via
DNP3 status point reects “1”/“True” value
STEP 8. When the Binary Input status points reect the values in Step 7, the user should
conrm connectivity to the communication gateway from the user’s computer
congured with the workaround and connected into the network connected to
the SpeedNet Radio headend point.
• URL: IP address associated with communication gateway’s Ethernet Port 2.
The Prole screen enables the present user logged in to the communication gateway to
change his or her password credentials. See Figure 72.
Figure 72. The Profile screen.
Profile
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