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MELSEC
11 PROGRAMMING
11.2 Cyclic Transmission
The link scan of the MELSECNET/H and the programmable controller of the user
program operate asynchronously.
Depending on the timing of the user program execution, link data with data types of
more than 32 bits (two words), such as the ones below, may be broken up into new
and old data, which may coexist in 16 bit (one word) units.
• Floating point data
• Current values of positioning module, command speed.
The MELSECNET/H provides the following functions for making handling of the link
data easy.
• 32 bit data guarantee (Refer to "Q corresponding MELSECNET/H network system
reference manual (PLC to PLC network)" for details.)
• Block guarantee of cyclic data per station (Refer to Section 11.2.1 Block guarantee
of cyclic data per station for details)
Содержание Q80BD-J71BR11
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