ProSoft Technology MVI69-DNP User Manual

Page 78

MVI69-DNP ♦ CompactLogix or MicroLogix Platform

Reference

DNP 3.0 Master/Slave Communication Module

Page 78 of 129

ProSoft Technology, Inc.

November 3, 2008

The following fields are used for each 10-word record in the command list:

Word Offset

Definitions

Description

0 Port/Flags This field is currently ignored as all 9901 blocks

are sent immediately out the master port.

1 Slave

Address

This is the IED node address for the slave to
consider on the network.

Object

Object type always 12

Variation

Variation always 1

4 Function Function codes 3, 5 and 6 supported. Function

code 4 is automatically sent after a successful
function 3.

Address in Slave

Point in IED to consider with the CROB.

6 Control

Code

This is a standard DNP protocol control code byte
(see description below).

7 Pulse

Count

This parameter specifies the number of pulses to
generate for pulse output control. This parameter
has a range of 0 to 255 as the value is a byte
parameter in the CROB. If a value of zero is
entered, the operation will not execute.

Pulse On Time

This parameter specifies the on-time interval for
pulse control.

9 Pulse

Off

Time

This parameter specifies the off-time interval for
pulse control.

The control code in the command is a bit coded byte value with the following
definition:

Bits Definitions Description

0 to 3

Code

These bits determine the control operation to be
performed by the command: 0=No operation,
1=Pulse on, 2=Pulse off, 3=Latch on and 4=Latch
off. All other values are undefined in the DNP
protocol.

4 Queue

0=Normal (execute once), 1=Requeue (place at
end of queue after operation).

5 Clear

This parameter clears the queue. If the value is
set to zero, the queue is not affected. If the value
is set to 1, the queue will be cleared.

6 to 7

Trip/Close

These two bits select the trip or close relay. For
close relay control, set the bits to 01. For trip
relay control, set the bits to 10. A value of 00 for
the bits is used for single point control of normal
digital output points.

Block Format for Read

Word Offset in Block Data Field(s)

Description

0 Block

This field contains the block identification code
of 9901 for the block.

Next write block ID
number

This field contains the ID number of the next
write block.