Chapter  12  Troubleshooting   
12-19 
Error 
Description  Solution 
16#180D 
The signal received by channel 6 
exceeds the range of analog inputs 
Check the signal received by channel 6 
16#180E 
The signal received by channel 7 
exceeds the range of analog inputs 
Check the signal received by channel 7 
16#180F 
The signal received by channel 8 
exceeds the range of analog inputs 
Check the signal received by channel 8 
- 
When power-on, the module is not 
Check if the connection between module and CPU 
module is working. If not, connect again. 
 
12.3.2
 
Troubleshooting for the Positioning Module AS02/04PU 
12.3.2.1  ERROR LED Indicators Blinking Every 0.2 Seconds 
Error 
Description  Solution 
 
12.3.3
 
Troubleshooting for the High-Speed Counter Module AS02HC 
12.3.3.1  ERROR LED Indicators Are ON 
Error 
Description  Solution 
16#1605 
Counted result in the latched area is not 
retainable (major error)   
Counted data is lost. Switch the module power OFF 
and ON again. The error code is cleared by the 
system. Contact the factory if the problem persists.   
16#1606 
Module settings in the latced area is not 
retainable. (major error) 
Module setting data is lost. Switch the module power 
OFF and ON again. Download the HWCONFIG 
settings again to clear the error code. Contact the 
factory if the problem persists. 
16#1607 
Module setting error   
(major error) 
Check if the setting in HWCONFIG is consistent with 
the actual placement. Contact the factory if the 
problem persists. 
 
12.3.3.2  ERROR LED Indicators Blinking Every 0.5 Seconds 
The following errors are specified as warnings to ensure that the CPU module can still run even when the warnings are 
triggered by its AIO modules.   
Error 
Description  Solution 
16#1800 
Counter overflow / underflow on CH1 
Check the counter result. If the alarm is not required, 
disable the alarm output function in HWCONFIG. Use 
any of the followings to clear the error code: clear, 
reset, preset the counter, restart the module, or 
execute DHCCNT instruction again.   
16#1801 
Counter overflow / underflow on CH2 
16#1802 
Linear count exceeding the set 
Check the signal received by channel 1 and 2. 
Hardware counter is still counting; when the number is