AH500 Module Manual 
16-26 
Field 
(All field contents are read only below) 
Supervisor Status 
DLR Supervisor status 
0: Supervisor as a back up 
Supervisor Status 
1: RTU module works under the mode of Ring Supervisor. 
2: End points of ring topology. 
3: Non-DLR ring topology.   
4: Ring parameters are unsupported 
Last Node on Port 1 
The IP address of a device that Port 1 connects when the ring 
topology is disconnected.   
Last Node on Port 2 
The IP address of a device that Port 2 connects when the ring 
topology is disconnected.   
Refresh Cycle  The default value of the refresh cycle; it is10 with the unit: seconds.   
ā-ā button 
The value of update cycle is decreased by 1 every time when clicking 
the button. The min. value of update cycle is 1.   
ā+ā button 
The value of update cycle is increased by 1 every time when clicking 
the button. The max. value of update cycle is 60.   
 
The general browsers at market are supported. See the list of them as below. 
 
16.6  CIP Object 
Please refer to EtherNet/IP Operation Manual for details. 
 
16.7  Trouble Shooting 
16.7.1  Error Type  
The error codes of AHRTU-ETHN-5A can be classified into RTU error, I/O module error, 
communication error and other error. 
For details on error types, see the following table. 
Error code classification 
Description 1
st
 Phase  2
nd
 Phase 
Category    Item   
RTU error 
Hardware error 
Hardware error detected after power 
on 
Configuration error  IP setup error 
Firmware error  Firmware update error 
I/O module error 
I/O module error  I/O module error 
I/O module configuration 
error 
Actually connected I/O module is 
different from that configured in the 
software. 
Backplane configuration 
Actually connected backplane is 
different from that configured in the