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Chapter 1 Overview
1-5
(2) HS Link Service
The high speed link is the communication method between the XGB PLC and XGK PLC communication modules
and data is transmitted and received periodically according to the high speed link parameter setting. The high speed
link service transmits a frame to the subnet broadcast using the UDP protocol. Devices in the same subnet receive
broadcast frame at the same time, and if the relevant frame is registered in the reception list, the data it will processed.
(3) P2P service
The P2P service is the client function in the following client/server model. This function requests the server for
reading/writing data. When the starting condition of each block is On, this function creates a request frame with the
protocol specified as the relevant channel, receives and processes the response.
The parameter consists of up to 64 P2P blocks.
(4) Server service
Dedicated communication (server) service is a protocol of Ethernet module that can read and write information and
data of PLC from PC and peripheral devices. Ethernet operates as a server in a communication network and
responds to memory read or write requests from an external device or PC using the XGT protocol or Modbus TCP
protocol. TCP port 2004 and UDP port 2005 are used for XGT dedicated driver of Ethernet module, and Modbus
TCP driver uses TCP 502. The dedicated service means the server function in the following client/server model. The
client connects to the server and read and write data according to the set protocol. The server performs the functions
of
②
reception detection and
③
response transmission.
Client
Server
Request Indication
Confirmation Response
(5) Remote service
Remote service function is a function that can control programming, downloading user programs, debugging program
and monitoring etc. in the network system where PLC is connected to each other by Ethernet without using XG5000
direct connection with communication module.
(6) EtherNet / IP service
EtherNet / IP is a protocol that puts Common Industrial Protocol (CIP: Common Industrial Protocol such as DeviceNet,
ControlNet, CompoNet, etc.) to the upper layer to the open protocol Ethernet. EtherNet / IP therefore enables
DeviceNet, ControlNet, and CompoNet product developers, system integrators and users to apply the same objects
and profiles to ensure interoperability between multi-vendor and sub-network devices. In addition, it provides two
Ethernet ports, and has built-in switch functions necessary for the existing star method, and is a module for data
transmission between PLCs or between PLCs and EtherNet / IP supported IO modules.