Extraction Procedure; Manual Extraction Procedure - GE MiCOM P40 Agile Technical Manual

P44x/EN SC/Hb6
(SC) 12-24
MODBUS Register
3x00802
3x00803 – 3x00929
3x00934
4x00251
Note:
The disturbance record status register will report one of the following values:
State
Idle
Busy
Page ready
Configuration complete
Record complete
Disturbance overwritten
No unextracted
disturbances
Not a valid disturbance
Command out of
sequence
3.6.2

Extraction procedure

The following procedure will be used to extract disturbances from the relay. The procedure
is split into four sections:
1. Selection of a disturbance – either manually or automatically
2. Extraction of the configuration file
3. Extraction of the data file
4. Accepting the extracted record (automatic extraction only)
3.6.2.1

Manual extraction procedure

The procedure used to extract a disturbance manually is shown in the following figure. The
manual method of extraction does not allow for the acceptance of disturbance records.
Name
o
N of registers in data
page
Data page registers
Disturbance record
status register
Data file format
selection
Register addresses are provided in reference code + address format. E.g. 4x00001 is
reference code 4x, address 1 (which is specified as function code 03, address 0x0000
in the MODBUS specification).
Description
This will be the state reported when no record is selected; such as after
power on or after a record has been marked as extracted.
The relay is currently processing data.
The data page has been populated and the master station can now
safely read the data.
All of the configuration data has been read without error.
All of the disturbance data has been extracted.
An error occurred during the extraction process where the disturbance
being extracted was overwritten by a new record.
An attempt was made by the master station to automatically select the
next oldest unextracted disturbance when all records have been
extracted.
An attempt was made by the master station to manually select a record
that did not exist in the relay.
The master station issued a command to the relay that was not
expected during the extraction process.
SCADA Communications
MiCOM P40 Agile P442, P444
Description
This register informs the master station of the
number of registers in the data page that are
populated.
These 127 registers are used to transfer data
from the relay to the master station. They are
16-bit unsigned integers.
The disturbance record status register is
used during the extraction process to indicate
to the master station when data is ready for
extraction. See next table.
This is used to select the required data file
format. This is reserved for future use.