Chapter 16 Remote I/O Module  AHRTU-ETHN-5A 
16-11 
Number  Attribute
Name  Description 
0: No module exists. 1: The module exists. 
b4
0: Inconsistent with the software configuration. 
1: consistent with the software configuration. 
SR21~28: The states of I/O modules 0~7 on the 
extension backplane 1   
SR29~36: The states of I/O modules 0~7 on the 
extension backplane 2. 
And so on… 
77  R  RTU error code  Refer to Troubleshooting in section 16.7.   
78-89  R 
modules on RTU’s 
main backplane   
Display the error codes of I/O modules 0~11 on the 
main backplane. For details, refer to the explanation of 
error codes in modules.   
90-145  R 
Error codes of I/O 
modules on RTU’s 
extension backplanes 
1~7 
Display the error codes of I/O modules 0~7 on the 
extension backplane 1~7.   
SR90~97: The error codes of I/O modules 0~7 on the 
extension backplane 1     
SR98~105: The error codes of I/O modules 0~7 on the 
extension backplane 2. 
And so on… 
For details, refer to the explanation of error codes in 
modules. 
16.4.3  RTU Input Register 
Number  Attribute
Name  Description 
0  R  Status 
0: Normal, 1: Alarming, 2: In error, 3: A fault exists but the 
module does not stop working. 
1  R  Reserved 
2  R  Error code  Error code in AHRTU   
3~10  R  Reserved 
11~15  R  I/O module status 
The status of every I/O module is expressed with one bit. 
(0: normal operation; 1: abnormal)   
Bit0 of number 11 stands for I/O module 0 on the main 
backplane. 
Bit 1 of number 11 is I/O module 1 on the main 
backplane and Bit 
11 of number 11 is I/O module 11 on the 
main backplane. Bit 12 of number 11 indicates I/O module 
0 on the extension module and so on.