Problem  Action 
Output LED and output are 
off when they should be on. 
Check that the output is not forced off. 
The LED is dim.  This normal operation when the controller is in 
sleep mode. 
 
13.5 Counter Inputs 
Problem  Action 
Input LED does not come 
on when input signal is 
applied. 
Check the input signal at the termination block. It 
should be at least 50% of the counter input range. 
The LED is dim.  This normal operation when the controller is in low 
power mode or sleep mode. 
 
SCADAPack LP Hardware Manual 
May 26, 2006   
40