Chapter 13 Communications Using A Random Access Buffer; Applications - Mitsubishi Electric QJ71E71-100 User Manual

CHAPTER 13
This section describes communications using a random access buffer.
13.1

Applications

In communications using a random access buffer, data can be freely read from and written to any connected device
(not including an E71). A random access buffer is used as a common buffer area for all the connected devices in the
Ethernet network.
Connected
device
Connected
device
Data communications (sending/receiving) by e-mail using a CPU module cannot be used together with communications
using a random access buffer. Only one of the functions can be used at one time. (The e-mail sending function using the E71
programmable controller CPU monitoring function can be used together with communications using a random access
buffer.)

CHAPTER 13 COMMUNICATIONS USING A RANDOM ACCESS BUFFER

COMMUNICATIONS USING A
RANDOM ACCESS BUFFER
E71
Writing
Random
Reading
access
Writing buffer
Reading
Writing Reading
Connected
device
Writing
Connected
device
Reading
Writing
Connected
Reading
device
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