Error 
code 
Description 
CPU 
status 
ERROR LED indicator 
ON 
000A  Scan timeout  Stop  V         
The program in the PLC is damaged. 
000D 
The initial value of the device and the PLC   
  program are not completely downloaded. 
Stop      V     
CPU memory access is denied. 
0012  The PLC password is incorrect.  Continue          V 
0020  CPU operation speed is not at its highest.  Stop      V     
0021 
Failed to restore Delta device parameters back to   
H      H     
Note: You can set to have PLC CPU stop running or not in HWCONFIG if this error occurs. If the setting is to have PLC 
CPU stopps running once 16#0021 occurs, the PLC CPU will stop running and the ERROR LED will go blinking. If the 
setting is to have PLC CPU keep running, the error will be stated in the Error Log but ERROR LED will not go blinking.   
0026 
RTC cannot keep track of the current time   
  (the battery LED is blinking.) 
Continue           
Battery low (the battery LED is ON.) 
002A 
24VDC power supply is not sufficient and then is 
recovered from low-voltage for less than 10 ms. 
Continue    V       
The PLC maximum password attempts exceeded. 
002E 
The access to the external memory of the CPU is 
denied. 
Stop      V     
002F 
PLC programs are not consistent with the system 
logs. 
Stop      V     
0040 
The converted value in the function card 1 (AS-
F2AD) or in the built-in AD input channel 1 
exceeds the setting range.   
Continue        V   
0041 
The converted value in the function card 1 (AS-
F2AD) or in the built-in AD input channel 2 
exceeds the setting range. 
Continue        V   
0042 
The converted value in the input channel 1 of the 
function card 2 (AS-F2AD) exceeds the setting 
Continue        V   
0043 
The converted value in the input channel 2 of the 
function card 2 (AS-F2AD) exceeds the setting 
range. 
Continue        V   
0044 
Connection lost in the mode of current input 4 mA 
- 20 mA for the function card 1 (AS-F2AD) or for 
the built-in AD input channel 1.     
Continue        V   
0045 
Connection lost in the mode of current input 4 mA 
- 20 mA for the function card 1 (AS-F2AD) or for 
the built-in AD input channel 2. 
Continue        V   
0046 
Connection lost in the mode of current input 4 mA 
- 20 mA for the input channel 1 of the function 
Continue        V   
0047 
Connection lost in the mode of current input 4 mA 
- 20 mA for the input channel 2 of the function 
card 2 (AS-F2AD). 
Continue        V   
Send Quote Requests to info@automatedpt.com
Call +1(800)985-6929 To Order or Order Online At Deltaacdrives.com
Send Quote Requests to info@automatedpt.com 
Call +1(800)985-6929 To Order or Order Online At Deltaacdrives.com