The RUN indicator on High-speed Counter Units lights when count operations begin. The conditions under which count operation will begin depend on the operating mode.

Example:

Using C200H-CT001-V1 in Linear Operating Mode
When bit 00 of word n allocated to the High-speed Counter Unit turns ON, the counting operation will begin, and the RUN indicator will light.
n = 100 +10 x Unit number for the C200HX/HG/HE, C200HS, or C200H
n = 2000 + 10 x Unit number for a CS1-series Programmable Controllers