GE P4A, Technical Manual, Page: 416 / 850

Analogue values can be reported to the master station as primary, secondary or normalized values (which takes
into account the IED’s CT and VT ratios), and this is settable in the COMMUNICATIONS column in the IED.
Corresponding deadband settings can be displayed in terms of a primary, secondary or normalized value.
Deadband point values can be reported and written using Object 34 variations.
The deadband is the setting used to determine whether a change event should be generated for each point. The
change events can be read using Object 32 or Object 60. These events are generated for any point which has a
value changed by more than the deadband setting since the last time the data value was reported.
Any analogue measurement that is unavailable when it is read is reported as offline. For example, the frequency
would be offline if the current and voltage frequency is outside the tracking range of the IED. All Object 30 points
are reported as secondary values in DNP 3.0 (with respect to CT and VT ratios).
7.3.6 OBJECT 40 ANALOGUE OUTPUT
The conversion to fixed-point format requires the use of a scaling factor, which is configurable for the various
types of data within the IED such as current, voltage, and phase angle. All Object 40 points report the integer
scaling values and Object 41 is available to configure integer scaling quantities.
7.3.7 OBJECT 50 TIME SYNCHRONISATION
Function codes 1 (read) and 2 (write) are supported for Object 50 (time and date) variation 1. The DNP Need Time
function (the duration of time waited before requesting another time sync from the master) is supported, and is
configurable in the range 1 - 30 minutes.
If the clock is being synchronized using the IRIG-B input then it will not be possible to set the device time using the
Courier interface. An attempt to set the time using the interface will cause the device to create an event with the
current date and time taken from the IRIG-B synchronized internal clock.
7.3.8 DNP3 DEVICE PROFILE
This section describes the specific implementation of DNP version 3.0 within General Electric MiCOM P40 Agile IEDs
for both compact and modular ranges.
The devices use the DNP 3.0 Slave Source Code Library version 3 from Triangle MicroWorks Inc.
This document, in conjunction with the DNP 3.0 Basic 4 Document Set, and the DNP Subset Definitions Document,
provides complete information on how to communicate with the devices using the DNP 3.0 protocol.
This implementation of DNP 3.0 is fully compliant with DNP 3.0 Subset Definition Level 2. It also contains many
Subset Level 3 and above features.
7.3.8.1 DNP3 DEVICE PROFILE TABLE
The following table provides the device profile in a similar format to that defined in the DNP 3.0 Subset Definitions
Document. While it is referred to in the DNP 3.0 Subset Definitions as a “Document”, it is just one component of a
total interoperability guide. This table, in combination with the subsequent Implementation and Points List tables
should provide a complete interoperability/configuration guide for the device.
The following table provides the device profile in a similar format to that defined in the DNP 3.0 Subset Definitions
Document. While it is referred to in the DNP 3.0 Subset Definitions as a "Document", it is just one component of a
total interoperability guide. This table, in combination with the subsequent Implementation and Points List tables
should provide a complete interoperability/configuration guide for the device.
DNP 3.0
Device Profile Document
Vendor Name: ALSTOM GRID
Device Name: MiCOM P40Agile Protection Relays – compact and modular range
Chapter 17 - Communications P54A/B/C/E
390 P54xMED-TM-EN-1