Ethernet Communication; Legacy Protocols; Hot-Standby Ethernet Failover; Hot-Standby Ethernet Failover Settings - GE MiCOM P40 Agile Technical Manual

SCADA Communications
MiCOM P40 Agile P442, P444
Since up to 32 relays can be connected to one K-bus spur, as indicated in Figure 2, it is
necessary for each relay to have a unique address so that messages from the master control
station are accepted by one relay only. Courier uses an integer number between 0 and 254
for the relay address that is set with this cell. It is important that no two relays have the same
Courier address. The Courier address is then used by the master station to communicate
with the relay. The default value is 255 and must be changed in the range 0 to 254 before
use.
The next cell down controls the inactivity timer.
The inactivity timer controls how long the relay will wait without receiving any messages on
the rear port before it reverts to its default state, including revoking any password access
that was enabled. For the rear port this can be set between 1 and 30 minutes.
In the case of EIA(RS)232 and EIA(RS)485 the next cell down controls the baud rate. For K-
Bus the baud rate is fixed at 64kbit/second between the relay and the KITZ interface at the
end of the relay spur.
Courier communications is asynchronous. Three baud rates are supported by the relay,
'9600 bits/s', '19200 bits/s' and '38400 bits/s'.
1.4

Ethernet communication

1.4.1

Legacy Protocols

It is possible to communicate through an Ethernet network using an Alstom Grid I4XS4UE
(refer to Px4x/EN REB user guide for Redundant Ethernet board connections).
1.4.2

Hot-standby Ethernet failover

This is used for products which do not have Ethernet redundancy and applies only to those
using single Ethernet boards. This board has one fibre and one copper interface. If there is a
fault on the fibre channel it can switch to the copper channel, or vice versa. Px4x products
which use the Parallel Redundancy Protocol (PRP) do not need this function.
When this function detects a link failure, it generates the NIC Fail Alarm. The failover timer
then starts, which has a settable timeout of 2 to 60 secs in 100 ms steps. During this time,
the Hot Standby Failover function continues to check the status of the other channel. If the
link failure recovers before the failover timer timesout, the channels are not swapped over. If
there is still a fail when the failover timer times out and the other channel status is ok, the
channels are swapped over. The Ethernet controller is then reconfigured and the link is
renegotiated.
1.4.2.1

Hot-standby Ethernet failover settings

To set the function:
1. Start S1 Agile.
2. Click the Ethernet Configuration tile.
3. Start the IEC 61850 IED Configurator.
RP2 address
255
RP2 inactivity timer
15 mins.
RP2 baud rate
19200
P44x/EN SC/Hb6
(SC) 12-13