Analog Inputs; E.2.4 Analog Inputs - GE T35 Instruction Manual

APPENDIX E
The following table lists Analog Inputs (Object 30). It is important to note that 16-bit and 32-bit variations of analog inputs
are transmitted through DNP as signed numbers. Even for analog input points that are not valid as negative values, the
maximum positive representation is 32767 for 16-bit values and 2147483647 for 32-bit values. This is a DNP requirement.
The deadbands for all Analog Input points are in the same units as the Analog Input quantity. For example, an Analog Input
quantity measured in volts has a corresponding deadband in units of volts. This is in conformance with DNP Technical Bul-
letin 9809-001 Analog Input Reporting Deadband. Relay settings are available to set default deadband values according to
data type. Deadbands for individual Analog Input Points can be set using DNP Object 34.
When using the T35 in DNP systems with limited memory, the Analog Input Points below may be replaced with a user-
definable list. This user-definable list uses the same settings as the Modbus User Map and can be configured with the Mod-
bus User Map settings. When used with DNP, each entry in the Modbus User Map represents the starting Modbus address
of a data item available as a DNP Analog Input point. To enable use of the Modbus User Map for DNP Analog Input points,
set the
USER MAP FOR DNP ANALOGS
menu). The new DNP Analog points list can be checked via the "DNP Analog Input Points List" webpage,
DNP PROTOCOL
accessible from the "Device Information menu" webpage.
After changing the
USER MAP FOR DNP ANALOGS
ting to take effect.
NOTE
Only Source 1 data points are shown in the following table. If the
data points for subsequent sources will be added to the list immediately following the Source 1 data points.
Units for Analog Input points are as follows:
• Current: A (amps)
• Voltage: V (volts)
• Real Power: W (watts)
• Reactive Power: var (vars)
• Apparent Power: VA (volt-amps)
• Energy Wh, varh (watt-hours, var-hours)
Static (Steady-State) Object Number: 30
Change Event Object Number: 32
Request Function Codes supported: 1 (read), 2 (write, deadbands only), 22 (assign class)
Static Variation reported when variation 0 requested: 1 (32-Bit Analog Input)
Change Event Variation reported when variation 0 requested: 1 (Analog Change Event without Time)
Change Event Scan Rate: defaults to 500 ms
Change Event Buffer Size: 800
Default Class for all Points: 1
Table E–6: ANALOG INPUT POINTS (Sheet 1 of 4)
POINTS DESCRIPTION
0 SRC 1 Phase A Current RMS
1 SRC 1 Phase B Current RMS
2 SRC 1 Phase C Current RMS
3 SRC 1 Neutral Current RMS
4 SRC 1 Phase A Current Magnitude
5 SRC 1 Phase A Current Angle
6 SRC 1 Phase B Current Magnitude
7 SRC 1 Phase B Current Angle
GE Multilin
setting to Enabled (this setting is in the
setting, the relay must be powered off and then back on for the set-
NUMBER OF SOURCES IN ANALOG LIST
•
•
•
•
Table E–6: ANALOG INPUT POINTS (Sheet 2 of 4)
POINTS
8
9
10
11
12
13
14
15
T35 Transformer Management Relay
E.2 DNP POINT LISTS
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PRODUCT SETUP
Frequency: Hz (hertz)
Angle: degrees
Ohm Input: ohms
RTD Input: °C (degrees Celsius)
DESCRIPTION
SRC 1 Phase C Current Magnitude
SRC 1 Phase C Current Angle
SRC 1 Neutral Current Magnitude
SRC 1 Neutral Current Angle
SRC 1 Ground Current RMS
SRC 1 Ground Current Magnitude
SRC 1 Ground Current Angle
SRC 1 Zero Sequence Current Magnitude

E.2.4 ANALOG INPUTS

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COMMUNICATIONS
setting is increased,
E
E-15