Checking With The Buffer Memory - Mitsubishi Electric MELSEC iQ-R Series User Manual

Checking with the buffer memory

The status of the Class1 communication connections and the error details can be checked with the following buffer memory
areas.
• 'Data link status (Class1)' (Un\G27136 to Un\G27151)
• 'Error status (Class1)' (Un\G27152 to Un\G27167)
• 'Reserved station (Class1)' (Un\G27168 to Un\G27183)
• 'Class1 Connection Behavior Error status' (Un\G27392 to Un\G27647)
• 'Node information area' (Un\G28160 to Un\G28170)
Connection information can also be checked with the following buffer memory by requesting reading of connection
information.
• 'Connection information' (Un\G28291 to Un\G28341)
Status of each connection
The connection status can be checked by checking the bit corresponding to each connection in 'Data link status (Class1)'
(Un\G27136 to Un\G27151), 'Error status (Class1)' (Un\G27152 to Un\G27167), and 'Reserved station (Class1)' (Un\G27168
to Un\G27183).
'Data link status (Class1)'
(Un\G27136 to Un\G27151)
Off
Off
On
Off
On
No error is generated for combinations other than those listed above.
For details on the buffer memory, refer to the following.
Page 150 Class1 communication status (Un\G27136 to Un\G27183)
Error details of each connection
The error code of each connection can be checked with 'Class1 Connection Behavior Error status' (Un\G27392 to
Un\G27647).
For details on the buffer memory, refer to the following.
Page 151 Class1 Connection Behavior Error status (Un\G27392 to Un\G27647)
For error code descriptions, refer to the following.
Page 127 Error codes when a communication error occurs
Checking node information
The RJ71EIP91 node information can be checked with 'Node information area' (Un\G28160 to Un\G28170).
For details on the buffer memory, refer to the following.
Page 152 Node information area (Un\G28160 to Un\G28170)
5 TROUBLESHOOTING
116
5.3 Checking the Network Status
'Error status (Class1)'
(Un\G27152 to Un\G27167)
Off
Off
Off
On
On
'Reserved station (Class1)'
(Un\G27168 to Un\G27183)
Off
On
Off
Off
Off
Status of each connection
Not connected or data link not in operation.
Set as a reserved station.
Data link in operation.
No error has occurred.
Error has occurred with data link not in
operation.
Error has occurred with data link in
operation.