AS Series Module Manual 
11-94 
Code  Indication  How to deal with
F9 
Internal error; 
An error in the access of the 
Flash of AS01DNET (RTU) 
Return the product to factory for repair if the error still exists 
after re-power on.   
E4 
Module error 
Check if an error occurs in the modules connected to the 
right side of AS01DNET (RTU);   
Check if the module exists;   
Check if current module matches that configured in the 
software; 
Check if the unconfigured module is added. 
E7 
Repeated node ID detection 
 
If the code has emerged for a long time, please shoot troubles 
in the methods below. 
1. Ensure that there are at least two nodes working normally 
in the network. 
2. Check if the two ends of the network are both connected 
with a 121Ω terminal resistor. 
3. Ensure that the baud rates of all network nodes are same. 
4. Check if the network cable has a problem such as being 
disconnected and loosened. 
5. Check if the bus  communication  cable  length  exceeds 
maximum  transmission distance. If the maximum 
transmission distance  is exceeded
system can not be ensured. 
6. Check  if the shielded wire of the network communication 
cable is grounded. 
7. Turn on the power of AS01DNET (RTU) again. 
E9 
The number of I/O modules 
connected to AS01DNET (RTU) 
exceeds the maximum 8. 
Check if the number of I/O modules connected to AS01DNET 
(RTU) is more than 8.   
80 
AS01DNET (RTU) is in STOP 
state.   
1. Check if the RUN/STOP switch of the PLC connected to 
the DeviceNet master is turned to RUN. 
2. Check if the value of control word of AS01DNET (RTU) is 
1. For details, refer to Section 11.5.4.3.4. 
83 
The AS01DNET (RTU) 
configuration in the software is 
Wait until the download of AS01DNET (RTU) configuration 
data is completed.   
 
When multiple errors exist, the seven-segment displayer of AS01DNET  (RTU)  will display error codes cyclically. For 
example, the error codes: E4 03 80 02 are displayed cyclically. See the detailed meaning as below. 
   
  E4 indicates a module error or offline. For details, see the explanation of codes above. 
  03 indicates the position of the module where an error occurs. The position of the first module connected to the right 
side of AS01DNET  (RTU)  is 1 and that of the second module is 2. Maximum 8 I/O modules are connectable to 
AS01DNET (RTU) within the range of 1~8.