Appendix 8 Buffer Memory - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

Appendix 8
The buffer memory is memory used with the following applications.
Module Application
CPU module Stores values such as Ethernet function setting values.
SIL2 function module and Stores the status of the SIL2 function module and safety function module (such as diagnostics information and system
safety function module information). ( Page 833 List of Special Register Areas)
The buffer memory content returns to its default status (initial value) when the CPU module is powered off or is reset.
List of buffer memory addresses
CPU module
The following table lists the CPU module buffer memory addresses.
■Ethernet function
For a list of buffer memory addresses as well as details relating to the Ethernet function, refer to the following.
( MELSEC iQ-R Ethernet User's Manual (Application))
■CC-Link IE Field Network Basic function
The following table lists buffer memory addresses relating to the CC-Link IE Field Network Basic function. (Programmable
controller CPU only) ( Page 894 Details on buffer memory addresses)
Address Name
Un\G1024 Total number of connected stations
Un\G1025 Reserved station specification status
Un\G1026 to Reserved station specification status
Un\G1029 of each station
Un\G1030 to Link scan information
Un\G1032, Un\G1034
to Un\G1036,
Un\G1038 to
Un\G1040, Un\G1042
to Un\G1044
Un\G1050 Diagnostic information display request
Un\G1051 Diagnostic request information
Un\G1052 Diagnostic information status flag
Un\G1053 to Diagnostic information 1
Un\G1064
Un\G1068 to Diagnostic information 2
Un\G1077
Buffer Memory
Data stored
The total number of connected stations set in parameter is stored.
The reserved station specification status of the slave station specified in parameter is
stored.
The reserved station specification status is stored.
The link scan time during cyclic transmission is stored.
When a station number (1 to 16) to be diagnosed is specified in 'Diagnostic request
information' (Un\G1051) and the bit 0 of 'Diagnostic information display request'
(Un\G1050) is turned off and on, the diagnostic information of the specified slave station is
stored in 'Diagnostic information 1' (Un\G1053 to Un\G1064) and 'Diagnostic information 2'
(Un\G1068 to Un\G1077).
APPX

Appendix 8 Buffer Memory

A
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