Error Log Area For Modbus/Tcp Function - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Error log area for MODBUS/TCP function

■Number of errors (Un\G720896)
This area is used for storing the number of errors that occurred during communications using MODBUS/TCP.
■Error log write pointer (Un\G720897)
This area is used for storing the error log number at which the latest error log was registered.
■Error log 1 (Un\G720898 to Un\G720905)
Address
Un\G720898
Un\G720899
Un\G720900
Un\G720901
Un\G720902 to Un\G720903
Un\G720904
Un\G720905
■Error log 2 to 32 (Un\G720906 to Un\G721153)
These areas are used for storing the information of the 2nd to 32th errors in the same order as Error log 1.
APPX
364
Appendix 3 Buffer Memory
Name
Detail error code
Abnormal response code
Function code
Own station port number
Destination IP address
Destination port number
System area
Description
Stores an error code. (Page 310 List of Error Codes)
Stores a MODBUS abnormal response code. ( MELSEC iQ-R
MODBUS/TCP Reference Manual)
Stores a function code that caused the error.
Stores the own station port number when the error occurred.
Stores the IP address of the destination station when the error
occurred.
Stores the port number of the destination station when the error
occurred.
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