Chapter 6 High-speed Link Service
6.1 Introduction
High-speed link (HS link) is a communication method between XGT PLC communication modules to
send and receive data with High-speed link parameters setting, which can also allow the user to use
XG5000 to exchange data with parameters setting of Send/Receive data size, communication period,
Send/Receive area and area to save through its data transmission service function.
However, since High-speed link service uses the subnet broad service, it may have an influence on
other communication modules which use the identical network. Thus, setting block size as near to the
maximum Send/Receive size (400 bytes or 200 words) as available per High-speed link block is
recommended for the user to obtain the greatest communication efficiency with the lowest influence on
other modules so to reduce the sum of blocks. In order to make use of all functions, surely specify the
basic communication parameters in the status of communication available.
High-speed link functions are specified as below;
1) High-speed link block setting function
(1) If there are many Send/Receive areas, up to 128 blocks can be setup.
(2) 200 words are available for a block.
2)
Communication period setting function
Send/Receive period can be setup per block by user for the areas where especially fast Tx/Rx
is required and not required respectively in a Tx/Rx period of 20ms to 10 sec.
3)
Send/Receive area setting function
Send/Receive area can be setup per data block by user according to memory address
specified.
4) Providing function of High-speed link information
Reliable communication system can be easily configured by providing High-speed link
information for user via the user keyword.
[Table 6.1.1] shows the data capacity of High-speed link communication whose basic unit is 1 word.
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