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Ladder Logic MVI69-DNP ♦ CompactLogix or MicroLogix Platform
DNP 3.0 Master/Slave Communication Module
ProSoft Technology, Inc. Page 45 of 129
November 3, 2008
3.2 Special Objects
These objects utilize some of the advanced features the module provides. If your
application does not require the object, then you need not declare an instance of
the object. Each of the objects and associated function are discussed in the
following topics.
3.2.1 DNPCROB Object
The DNPCROB object is used in conjunction with the command control block
9901. This block sends a pulse output command to a single-point relay or a
trip/close relay. All the parameters required for each command to be used in the
block are contained in the object. Up to six of these objects can be contained in a
single block 9901 command. The structure of the object is shown in the following
example:
Tag Name Data Type Description
Port_Flag INT This field is ignored in the current implementation
Slave_ID INT
This is the DNP slave address to send the command
to
Object INT This should always be 12
Variation INT This should always be 1
Function INT
This should be 3, 5 or 6 depending on the write
method
Address INT
This is the binary output starting point to operate in
the slave
Control_Code INT This determines the CROB operation
Pulse_Count INT This determines the number of pulses (0-255)
Pulse_On INT This determines the pulse on time
Pulse_Off INT This determines the pulse off time
3.2.2 DNPEventMsg Object
The DNPEventMsg object stores event messages received on the DNP master
port and passed to the processor. The structure of this object is shown in the
following example:
Tag Name Data Type Description
DevIndex INT Logical slave device index in module
IEDPoint INT Logical point address in IED database
DNPPoint INT Logical point address in DNP database
SlaveAddress INT Remote slave address that generated event
PointNum INT Point address in remote device
Object INT DNP object number for point
Variation INT DNP variation for event
LowTime INT Least-significant word of 48-bit DNP time
HighTime DINT Most-significant double-word of 48-bit DNP time
Value DINT Value for event
This information is passed to the processor from the module in a special read
block with an identification code of 9903. Each block can send up to 20 event
messages. Ladder logic must handle the receipt of this special data block and to
place the data received into controller tags.
- MVI69-DNP 1
- Please Read This Notice 2
- Contents 5
- 1 Start Here 9
- 1.2 Package Contents 10
- 1.3 Setting Jumpers 11
- 1.6.1 Configuring RSLinx 17
- 2.1 Configuration File 21
- 2.3 Slave List 29
- 2.4 Command List 29
- 2.4.9 Poll Interval 34
- 3 Ladder Logic 41
- 3.1.2 DNPSlvStat Object 42
- 3.1.3 DNPBackplane Object 44
- 3.1.4 DNPData Object 44
- 3.2 Special Objects 45
- 3.2.1 DNPCROB Object 45
- 3.2.2 DNPEventMsg Object 45
- 3.2.3 DNPSlave_Err Object 46
- 3.2.4 DNP_BI_Event Object 46
- 3.2.5 DNP_AI_Event Object 46
- 60 62 61 51
- 120 122 121 51
- 240 242 241 51
- 4.1.2 Required Hardware 54
- 4.1.3 Required Software 55
- 4.1.5 Main Menu 56
- 4.2 LED Status Indicators 66
- 4.2.2 Troubleshooting 68
- 5 Reference 69
- 5.2 Functional Overview 72
- 5.2.1 General Concepts 72
- 5.2.2 Normal Data Transfer 75
- Processor 87
- 5.3 Cable Connections 89
- 5.3.2 RS-232 91
- 5.3.3 RS-422 93
- 5.3.4 RS-485 94
- 5.4 Error Status Table 95
- 5.4.1 Module Error Codes 99
- 5.5 Internal Indication Word 103
- 5.5.1 First Byte 103
- 5.5.2 Second Byte: 103
- In This Chapter 119
- 6.2.1 All Product Returns: 120
- 6.3 LIMITED WARRANTY 122
- 6.3.8 No Other Warranties 125
- 6.3.9 Allocation of Risks 125
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