Toshiba GR200 Series Instruction Manual page 536

Switching LAN ports
performed if a response signal is
not received for setting
[Chk_Count].
Figure 10.2-3 Time chart for Example 1
Example2:
It is assumed that there are three remote devices on the network:
Ping_IP1, Ping_IP2, and Ping_IP3. The Hot-standby function sends a Ping packet to
every remote device every 10 second (i.e., the IED sends a ping packet to a remote
device every 30 second). Suppose that "1" is set for [Check_Count]. The Hot-standby
function can determine a communication failure after 30 seconds if one of the remote
devices is unable to send a response. Figure 10.2-4 shows the operation. Switching is
not executed, because the IED cannot confirm all no-responses from the remote
addresses in the milled of the figure. Switching is performed after no-response is
confirmed from all remote devices.
The IP addresses of the remote devices are set for [Ping_IP1] to [Ping_IP3].
・
(Setting IP addresses for other remote devices is not required.)
10seconds is set for [Ping_Wait].
・
Number "5" is set for [Ping_Interval].
・
Number "1" is set for [Check_Count].
・
Local IED
Ping_Wait
Ping_Interval
: 1sec
: 5sec
1sec
5sec
1sec
5sec
is
1sec
5sec
- 522 -
6F2S1931 (0.20)
Remote device with
Ping_IP1 address
Sending Ping Packet for Ping_IP1.
OK: Response received
Sending Ping Packet for Ping_IP1.
NG: due to delayed response
Sending Ping Packet for Ping_IP1.
NG: due to no response
Sending Ping Packet for Ping_IP1.
Centralized GRB200
(Soft: 030, 031, 032, 033, 034)