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APPX
Appendix 3  Buffer Memory
Appendix 3
Buffer Memory
The buffer memory is used to exchange data between the RJ71EIP91 and the CPU module or EtherNet/IP devices. Buffer 
memory values are set to their defaults (initial values) when the system is powered off or the CPU module is reset.
List of buffer memory addresses
Address (decimal) Address 
(hexadecimal)
Name Initial 
value
Read, write
0 to 16628 0H to 40F4H System area
16629 40F5H Block assurance specification per connection Setting 
value
*1
Read, write
16630 40F6H Block assurance state per connection 0 Read
16631 40F7H Application Trigger operating 
specification (Class1)
Application Trigger operating 
specification request
0 Read, write
16632 40F8H Application Trigger operating 
specification state
0Read
16633 40F9H System area
16634 40FAH EtherNet/IP data link continuation 
specification
EtherNet/IP data link continuation 
specification request
0 Read, write
16635 40FBH EtherNet/IP data link continuation 
specification state
0Read
16636 to 16639 40FCH to 40FFH System area
16640 to 16895 4100H to 41FFH Class1 I/O data size Class1 Input data length 0 Read
16896 to 17151 4200H to 42FFH Class1 Output data length 0 Read
17152 to 25732 4300H to 6484H System area
25733 to 25735 6485H to 6487H Setting status MAC Address Setting 
value
Read
25736 to 25855 6488H to 64FFH System area
25856 to 26111 6500H to 65FFH Class1 I/O data start offset 
address
Class1 Start offset address to the 
input data
65535 Read
26112 to 26367 6600H to 66FFH Class1 Start offset address to the 
output data
65535 Read
26368 to 27007 6700H to 697FH System area
27008 to 27023 6980H to 698FH Application Trigger (Class1) Application Trigger Request 
(Class1)
0 Read, write
27024 to 27039 6990H to 699FH Application Trigger Acceptance 
(Class1)
0Read
27040 to 27055 69A0H to 69AFH Application Trigger Completion 
(Class1)
0Read
27056 to 27135 69B0H to 69FFH System area
27136 to 27151 6A00H to 6A0FH Class1 communication status Data link status (Class1) 0 Read
27152 to 27167 6A10H to 6A1FH Error status (Class1) 0 Read
27168 to 27183 6A20H to 6A2FH Reserved station (Class1) 0 Read
27184 to 27391 6A30H to 6AFFH System area
27392 to 27647 6B00H to 6BFFH Class1 Connection Behavior Error status 0 Read
27648 to 27903 6C00H to 6CFFH System area
27904 6D00H PING test request area Communication time check 0 Read, write
27905 6D01H Transmission count 0 Read, write
27906 to 27907 6D02H to 6D03H IP Address 0 Read, write
27908 6D04H PING test result area Result 0 Read
27909 6D05H Total Number of packet 
transmissions
0Read
27910 6D06H Number of success 0 Read
27911 6D07H Number of failure 0 Read
27912 to 28159 6D08H to 6DFFH System area