ProSoft Technology InRax MVI71-DNPSNET, Руководство пользователя

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MVI71-DNPSNET ♦ PLC Platform Reference
Distributed Network Protocol Interface Module
Page 86 of 100 ProSoft Technology, Inc.
September 22, 2008
DNP Analog Output Data
This data type stores analog values sent from the DNP master unit to the module
and PLC with a data range of 0 to 65535 or -32768 to 32767. The size of this
data area is determined from the configuration parameter Analog Outputs. These
data are transferred from the module to the PLC using the write operation.
Therefore, these data are read-only for the PLC, as the PLC cannot directly alter
these values in the module. It is the responsibility of the DNP master unit to
maintain this data. For example, if the DNP master sends a value of 3405 to the
module for a specific point, the value will be stored in the module until changed
by the master. A data flow diagram for the analog output data follows.
Communication Parameters
This phase of design defines the communication parameters required for
successful communications between the module and DNP master and slave
units over the Ethernet network. Determine the IP address for the module and
the list of IP addresses that can connect to the unit if this feature is enabled.
Consult with the MIS person in charge of assigning these addresses and setting
up the network configuration. The
Module Configuration
section contains a
form to aid in setting these parameters. Fill out this form before attempting to
configure the module. You must also determine if the UDP or the TCP protocol or
both will be used in your application. The module supports a single connection
for the TCP protocol. The UDP server supports receipt of messages from
multiple clients. Access to both servers can be limited by using the IP address list
filtering.