GE 869, Communications Manual

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4-2 869 MOTOR PROTECTION SYSTEM – COMMUNICATIONS GUIDE
DNP COMMUNICATION CHAPTER 4: DNP 3
Binary input data : Binary input data is used to monitor two-state device operations
such as the position of a circuit breaker. The user can configure up to 96 Binary inputs.
All binary inputs are configured from Flexlogic operands.
Binary output data : Binary output data is used to control two-state devices such as
the tripping or circuit closing of a circuit breaker. The 869 can be configured to support
up to 16 Binary outputs. The slave’s Binary outputs are automatically mapped into the
869 virtual inputs starting at virtual input 1. Please note that the number of Binary/
Control outputs is configurable. The user can configure a subset that supports dual
point control. This subset starts at address 0.
Analog input data : Analog input data is used to monitor analog signals such as
voltages, currents, and power. Up to 32 analog points can be mapped to the master.
Analog output data : Not supported in the 869 .
Time stamps
Count input data : Count input data could represent a cumulative quantity such as
kilowatt-hours of energy. Up to 16 counter points can be mapped to the master.
Table 4-1: Supported Object Numbers
Object DNP Data Type 869
1 Binary Input Status User Assigned FlexLogic Operands
2 Binary Input Change since last
read
10 Binary Output Status for
monitoring
User assigned Virtual Inputs and/
or Commands (client looks at
status only)
12 Control Relay Output Block User assigned Virtual inputs and/
or Commands (client can write to
the user specified number of
control relay outputs)
20 Counter Value Digital counters 1 through 16.
21 Frozen Counter Value
22 Counter Value Change since last
read