Appendix 3 Buffer Memory; List Of Buffer Memory Addresses - Mitsubishi Electric MELSEC iQ-R Series User Manual

Appendix 3
The buffer memory is used to exchange data between the RJ71DN91 and the CPU module. Buffer memory values are
defaulted when the CPU module is reset or the system is powered off and on.

List of buffer memory addresses

Address Address
(decimal) (hexadecimal)
0 to 271 0000H to 010FH
272 to 287 0110H to 011FH
288 to 303 0120H to 012FH
304 to 423 0130H to 01A7H
424 to 431 01A8H to 01AFH
432 01B0H
433 01B1H
434 01B2H
435 01B3H
436 to 439 01B4H to 01B7H
440 to 443 01B8H to 01BBH
444 to 447 01BCH to 01BFH
448 to 451 01C0H to 01C3H
452 to 455 01C4H to 01C7H
456 to 459 01C8H to 01CBH
460 to 463 01CCH to 01CFH
464 to 467 01D0H to 01D3H
468 to 975 01D4H to 03CFH
976 to 1007 03D0H to 03EFH
1008 03F0H
1009 to 1151 03F1H to 047FH
1152 0480H
1153 0481H
1154 to 1217 0482H to 04C1H
1218 to 1279 04C2H to 04FFH
Buffer Memory
Name Description
System area
Message Sets the message communication command.
communication
command
Message Stores the processing results of the message
communication result communication.
Message Stores the transmit/receive data of the message
communication data communication.
System area
Master function Stores the communication status of the master
communication status function.
Master function error Stores the communication error code occurred in
information the master function.
Bus error counter Stores the number of CAN chip (DeviceNet
communication chip) illegal frame counts
exceeding 96 times.
Bus off counter Stores the number of the RJ71DN91 transitions to
the bus off status.
Configuration status of Stores the parameter setting status of the slave
nodes node.

System area
Communication status of Stores the I/O communication status of the slave
nodes node.
Communication error Stores the I/O communication error status of the
status of nodes slave node.
Error status of nodes Stores the communication trouble status of the
slave node.

System area
Down node detection Sets whether to detect the down node.
prohibit setting

System area
Master function Sets the master function parameters.
*1
parameters
System area
Auto configuration Sets the operation of the auto configuration.
operation setting
System area
Master function Stores the communication error code occurred in
communication error the own node.
information It is valid only when the own node uses the
master function.
Slave function Stores the communication error code occurred in
communication error the own node.
information It is valid only when the own node uses the slave
function.
Other slave Stores the communication error code occurred in
communication error each slave node.
information It is valid only when the own node uses the
master function.
System area
As As Read, write
master slave
function function
 
Write
 
Read
 
Read, write
 
Read
 
Read
  Read
 
Read
  Read
  
  Read
 
Read
  Read
  
  Read, write
  
  Read, write
 
Read, write
 
Read
 
Read
 
Read
APPX

Appendix 3 Buffer Memory

A
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