GE P444 User Manual

P44x/EN SC/H
b6
SCADA Communications
(SC) 12
-22 MiCOM P40 Agile
P442, P444
Each fault or maintenance record logged causes an event record to be created by the relay.
If this event record is selected the additional registers allowing the fault or maintenance
record details will also become populated.
3.5.2 Automatic extraction
The automatic extraction facilities allow all types of record to be extracted as they occur.
Event records are extracted in sequential order including any fault or maintenance data that
may be associated with the event.
The MODBUS master can determine whether the relay has any events stored that have not
yet been extracted. This is performed by reading the relay status register 30001 (G26 data
type). If the event bit of this register is set then the relay has unextracted events available.
To select the next event for sequential extraction the master station writes a value of 1 to the
record selection register 40400 (G18 data type). The event data together with any
fault/maintenance data can be read from the registers specified below. Once the data has
been read the event record can be marked as having been read by writing a value of 2 to
register 40400.
3.5.3 Record data
The location and format of the registers used to access the record data is the same whether
they have been selected using either of the two mechanisms detailed above.
Event
Description
MODBUS
Address
Length Comments
Time and Date 30103 4 See G12 data type description in section 3.8.
Event Type 30107 1 See G13 data type. Indicates type of event.
Event Value 30108 2
Nature of value depends on event type. This will
contain the status as a binary flag for contact, opto,
alarm, and protection events.
MODBUS
Address
30110 1
This indicates the MODBUS register address where
the change occurred.
Alarm 30011
Relays 30723
Optos 30725
Protection events – like the relay and opto
addresses this will map onto the MODBUS address
of the appropriate DDB status register depending on
which bit of the DDB the change occurred. These
will range from 30727 to 30785.
For platform events, fault events and maintenance
events the default is 0.
Event Index 30111 1
This register will contain the DDB ordinal for
protection events or the bit number for alarm
events. The direction of the change will be
indicated by the most significant bit; 1 for
0 – 1 change and 0 for 1 – 0 change.
Additional Data
Present
30112 1 0 means that there is no additional data.
1 means fault record data can be read from 30113
to 30199 (number of registers depends on the
product).
2 means maintenance record data can be read from
30036 to 30039.
If a fault record or maintenance record is directly selected using the manual mechanism then
the data can be read from the register ranges specified above. The event record data in
registers 30103 to 30111 will not be available.
It is possible using register 40401(G6 data type) to clear independently the stored relay
event/fault and maintenance records. This register also provides an option to reset the relay
indications, which has the same effect on the relay as pressing the clear key within the alarm
viewer using the front panel menu.

GE P444 Specifications

General

Brand	GE
Model	P444
Category	Protection Device
Language	English