Toshiba GR200 Series Instruction Manual page 531

record, subscript '1' of "IPADDRESS1, SUBNETMASK1, and GATEWAY1" is for
first LAN module.)
§Note: LAN for Local PC at C13 is just provided for PC engineering tools (i.e., GR-
TEIMS, PLC editor). Notice that the LAN at C13 is not designed for the network
such as IEC61850, Hot-standby, IEC62439-3(PRP) etc.
Redundant LAN (Hot-standby)
10.2.2
Hot-standby is designed to change to another LAN path if an error occurs on the LAN
communication; accordingly, the LAN communication can have more security (i.e. "Redundant
communication"). The "Hot-standby (HOTST)" operation is possible when the IED has dual
communication modules for the LAN network. The Hot-standby runs when the user sets
Hot_Standby for scheme switch [RedundantMode]†.
†Note: When the user wishes not to operate Hot-standby, or the network is not ready for
the redundant, set Fixed for the [RedundantMode]. Port B (located at C12 if
provided) can only operate for the connection with the engineering tool (GR-
TIEMS®) or the PLC editor (MULTIPLOG®).
‡Note: See Chapter
module
Overview
(i)
For the Hot-standby communication, the first communication module for Network is used as
the primary port, (i.e. Port A at C11) while a second communication module for Network, (i.e.
Port B at C12) is used as the secondary port; the IED will communicate using Port A for normal
operation. If a communications failure occurs at Port A, the IED can automatically switch
communication from Port A to Port B.
When the IED detects the occurrence of a communications failure, for which the LAN
module is unable to respond to the IED (i.e. a communications link is down), the IED starts a
timer. When the timer exceeds a setting [DownTime], the IED will switch ports. Thus, Port B
is then used for communications. (Note that Port A can be determined to be the secondary port
on the occurrence of the failure. If Port B is unable to continue to operate, then Port A will be
re-switched to run after a predetermined setting [UpTime]. Then, Port B will be discriminated
as the secondary port.)
Primary port selection
(ii)
The user can select any one of the ports to be the primary port although the Port A is normally
used as the primary port. For example, provided that both Port A and Port B are physically
connected to the LAN, when the user wishes to use Port B as the primary port, the user should
Technical description: Signal processing and communication
.
- 517 -
6F2S1931 (0.20)
Centralized GRB200
(Soft: 030, 031, 032, 033, 034)