Functional Overview
6202-WA-DFNT-DFCM3
♦
ProLinx Gateway
Wireless EtherNet/IP to DF1 Master/Slave-3 ports
ProSoft Technology, Inc.
Page 95 of 190
February 2, 2009
Periodic Data Services utilize a low level protocol (UDP/IP) which requires less
overhead than fully acknowledged stream oriented protocols.
4.3.1 Underlying Protocol Requirements and Constraints
PWP protocol messages are classified as data messages. PWP operates on a
message based, connectionless network transport layer, such as the internet
UDP/IP protocol. Each protocol message is sent to a specific network access
point (UDP port) on one or more destination nodes. Data messages are
individually configured to send a sample of data at a fixed periodic rate. Each
data message that a node sends or receives is associated with a specific
identifier, which uniquely defines the configuration of the data sample. This
configuration is called an exchange. PWP allows the configuration of exchanges
which are sent to:
A single destination address (IP Unicast addressing)
A group of addresses (IP Multicast addressing)
All PWP nodes (IP Broadcast addressing).
An assigned set of 32 IP Multicast addresses has been defined for use by
applications requiring the transmission of data exchanges to a group of nodes.
The following tables show the defined network parameters for PWP.
Assigned UDP Network Ports
Parameter UDP
Port
Command Port
7937. (1F01H)
Data Port
18246. (4746H)
Multicast Address Assignments
Parameter IP
Address
Group 1
224.0.7.1
Group 2
224.0.7.2
… …
Group 32
224.0.7.32
The user defines the data to be produced and consumed in a configuration file
downloaded to the module. The driver interfaces with a common internal
database in the module. This permits the sharing of data across many different
types of networks.
Summary of Contents for 6202-WA-DFNT-DFCM3
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